Broadwell (microarchitecture)

Broadwell
CPUID code	000306D4
Product code	80658
L1 cache	64 KB per core
L2 cache	256 KB per core
L3 cache	2–6 MB (shared)
L4 cache	128 MB of eDRAM (Iris Pro models only)
Created	2014
Transistors	14 nm transistors
Architecture	Broadwell x86
Instructions	MMX, AES-NI, CLMUL, FMA3
Extensions	x86-64 SSE, SSE2, SSE3, SSSE3, SSE4, SSE4.1, SSE4.2 AVX, AVX2, TXT, TSX VT-x, VT-d
Socket(s)	LGA 1150 rPGA 947 BGA 1364 LGA 2011-v3
Predecessor	Ivy Bridge (tick) Haswell (tock)
Successor	Skylake (tock)
GPU	HD 5300 HD 5500 HD 5700P HD 6000 HD 6100 HD 6200 HD 6300P HD Graphics
Brand name(s)	Core i3 Core i5 Core i7 Core M Celeron Pentium Xeon

Broadwell is Intel's codename for the 14 nanometer die shrink of its Haswell microarchitecture. It is a "tick" in Intel's tick-tock principle as the next step in semiconductor fabrication.^[1]^[2]^[3] Like some of the previous tick-tock iterations, Broadwell will not completely replace the full range of CPUs from the previous microarchitecture (Haswell), as there will be no low-end desktop CPUs based on Broadwell.^[4]

Intel Core processors based on the Broadwell microarchitecture are marketed as fifth-generation Core i3, i5 and i7 processors. This microarchitecture also introduced the Core M processor branding.

Broadwell's H and C variants will be used in conjunction with Intel 9 Series chipsets (Z97, H97 and HM97), in addition to retaining backward compatibility with some of the Intel 8 Series chipsets.^[5]

Design and variants

Broadwell has been launched in three major variants:^[6]

BGA package:
- Broadwell-Y: system on a chip (SoC); 4.5 W and 3.5 W thermal design power (TDP) classes, for tablets and certain ultrabook-class implementations. GT2 GPU will be used, while maximum supported memory is 8 GB of LPDDR3-1600.^[7] These will be the first chips to roll out, and are expected for Q3/Q4 2014. At Computex 2014, Intel announced that these chips will be branded as Core M.^[8]
- Broadwell-U: SoC; two TDP classes – 15 W for 2+2 and 2+3 configurations (two cores with a GT2 or GT3 GPU) as well as 28 W for 2+3 configurations.^[9] Designed to be used on motherboards with the PCH-LP chipset for Intel's ultrabook and NUC platforms. Maximum supported is up to 16 GB of DDR3 or LPDDR3 memory, with DDR3-1600 and LPDDR3-1867 as the maximum memory speeds. The 2+2 configuration is scheduled for Q4 2014, while the 2+3 is estimated for Q1 2015.^[6] For Broadwell-U models with integrated 5x00 GPUs, die size is 82 mm² with a total of 1.3 billion transistors, while for the models with 6100 and 6200 GPUs the die size is 133 mm² with a total of 1.9 billion transistors.
- Broadwell-H: 37 W and 47 W TDP classes, for motherboards with HM86, HM87, QM87 and the new HM97 chipsets for "all-in-one" systems, mini-ITX form-factor motherboards, and other small footprint formats. It may come in two different variants, as single and dual chips; the dual chips (4 cores, 8 threads) will have GT3e and GT2 GPU, while a single chip (SoC; two cores, four threads) will have GT3e GPU. Maximum supported memory is 32 GB of DDR3-1600.^[7] These are scheduled for Q2 2015.^[6]
LGA 1150 socket:
- Broadwell-DT: quad-core unlocked desktop version with GT3e integrated graphics (Iris Pro 6200) and 128 MB of eDRAM L4 cache, in a 65 W TDP class. Announced to be backward compatible with the LGA 1150 motherboards designed for Haswell processors.^[10]
LGA 2011-v3 socket:
- Broadwell-EP: to be marketed as Xeon E5-2600 v4 etc., while using the C610 Wellsburg chipset platform. Up to 22 cores and 44 threads, up to 55 MB of total cache and 40 PCI Express 3.0 lanes, with 55–160 W TDP classes. Maximum supported memory speed is quad-channel DDR4-2400.^[11]
- Broadwell-EX: Brickland platform, for mission-critical servers. Intel QuickPath Interconnect (QPI) is expected to be updated to version 1.1, enabling seamless scaling beyond eight-socket systems. Maximum supported memory speeds are expected to be DDR3-1600 and DDR4-1866.^[12]^[13] Up to 24 core and 48 threads, up to 60 MB of L3 cache and 32 PCI Express 3.0 lanes, with 115–165 W TDP.

Instruction set extensions

Broadwell introduces some instruction set architecture extensions:^[14]^[15]

Intel ADX: ADOX and ADCX for improving performance of arbitrary-precision integer operations^[16]
RDSEED for generating 16-, 32- or 64-bit random numbers from a thermal noise entropy stream, according to NIST SP 800-90B and 800-90C^[17]
PREFETCHW instruction^[17]
SMAP (Supervisor Mode Access Prevention) – optionally disallows access from kernel-space memory to user-space memory, a feature aimed at making it harder to exploit software bugs.

New features

Broadwell's Intel Quick Sync Video hardware video decoder adds VP8 hardware decoding^[18] and encoding^[19] support. Also, it will have two independent bit stream decoder (BSD) rings to process video commands on GT3 GPUs; this will allow one BSD ring to process decoding and the other BSD ring to process encoding at the same time.^[20]

Broadwell's integrated GPU supports Direct3D 11.2, OpenGL 4.4 and OpenCL 2.0.^[21]^[22]^[23] However, it is marketed as Direct3D-12-ready.^[24]

List of Broadwell processors

Desktop processors

Target segment	Cores (threads)	Processor branding and model		GPU model	CPU frequency		TDP	Graphics clock rate		L3 cache	L4 cache^{[lower-alpha 1]}	Release date	Price (USD)	Socket
Target segment	Cores (threads)	Processor branding and model		GPU model	Base	Turbo	TDP	Base	Max	L3 cache	L4 cache^{[lower-alpha 1]}	Release date	Price (USD)	Socket
Performance	4 (8)	Core i7	5775C	Iris Pro 6200	3.3 GHz	3.7 GHz	65 W	300 MHz	1.15 GHz	6 MB	128 MB	June 2, 2015 (2015-06-02)^[25]	$366	LGA 1150
Mainstream	4 (4)	Core i5	5675C	Iris Pro 6200	3.1 GHz	3.6 GHz	65 W	300 MHz	1.1 GHz	4 MB	128 MB	June 2, 2015 (2015-06-02)^[25]	$276	LGA 1150

Embedded processors

Target segment	Cores (threads)	Processor branding and model		GPU model	CPU frequency		TDP	Graphics clock rate		L3 cache	L4 cache^{[lower-alpha 1]}	Release date	Price (USD)	Socket
Target segment	Cores (threads)	Processor branding and model		GPU model	Base	Turbo	TDP	Base	Max	L3 cache	L4 cache^{[lower-alpha 1]}	Release date	Price (USD)	Socket
Performance	4 (8)	Core i7	5775R	Iris Pro 6200	3.3 GHz	3.8 GHz	65 W	300 MHz	1.15 GHz	6 MB	128 MB	June 2, 2015 (2015-06-02)^[25]	$348	BGA 1364
Mainstream	4 (4)	Core i5	5675R		3.1 GHz	3.6 GHz			1.1 GHz	4 MB			$265
Mainstream	4 (4)	Core i5	5575R		2.8 GHz	3.3 GHz			1.05 GHz	4 MB			$244
Server	4 (8)	Xeon E3	1278Lv4	Iris Pro P6300	2.0 GHz	3.3 GHz	47 W	800 MHz	1.0 GHz	6 MB			$546
	4 (8)	Xeon E3	1258Lv4	P5700	1.8 GHz	3.2 GHz	47 W	700 MHz	1.0 GHz	6 MB	N/A		$481
	4 (?)	Xeon E3	1284Lv4^[26]	Iris Pro P6300	2.9 GHz	3.8 GHz	47 W	TBA	TBA	6 MB	128 MB	TBA	OEM	BGA 1364

Mobile processors

Target segment	Cores (threads)	Processor branding and model		GPU model	Base frequency	Turbo frequency		TDP	cTDP down	Graphics clock rate		L3 cache	Release date	Price (USD)
Target segment	Cores (threads)	Processor branding and model		GPU model	Base frequency	Single Core	Dual Core	TDP	cTDP down	Base	Max	L3 cache	Release date	Price (USD)
Performance	4 (8)	Core i7	5950HQ	Iris Pro 6200	2.9 GHz	3.7 GHz	N/A	47 W	N/A	300 MHz	1.15 GHz	6 MB	June 2015	$623
			5850HQ	Iris Pro 6200	2.7 GHz	3.6 GHz	N/A	47 W	N/A	300 MHz	1.1 GHz	6 MB	June 2015	$434
			5750HQ	Iris Pro 6200	2.5 GHz	3.4 GHz	N/A	47 W	600 MHz / 37 W	300 MHz	1.05 GHz	6 MB	June 2015	$434
			5700HQ	HD 5600	2.7 GHz	3.5 GHz	N/A	47 W	600 MHz / 37 W	300 MHz	1.05 GHz	6 MB	June 2015	$378
Mainstream	2 (4)		5650U	HD 6000	2.2 GHz	3.2 GHz	3.1 GHz	15 W	600 MHz / 9.5 W	300 MHz	1 GHz	4 MB	Q1 2015	$426
			5600U	HD 5500	2.6 GHz	3.2 GHz	3.1 GHz	15 W	600 MHz / 7.5 W	300 MHz	950 MHz	4 MB	Q1 2015	$393
			5557U	Iris 6100	3.1 GHz	3.4 GHz	3.4 GHz	28 W	N/A / 23 W	300 MHz	1.1 GHz	4 MB	Q1 2015	$426
			5550U	HD 6000	2.0 GHz	3.0 GHz	2.9 GHz	15 W	600 MHz / 9.5 W	300 MHz	1 GHz	4 MB	Q1 2015	$426
			5500U	HD 5500	2.4 GHz	3.0 GHz	2.9 GHz	15 W	600 MHz / 7.5 W	300 MHz	950 MHz	4 MB	Q1 2015	$393
		Core i5	5350H	Iris Pro 6200	3.1 GHz	3.5 GHz	N/A	47 W	N/A	300 MHz	1.05 GHz	4 MB	June 2015	$289
			5350U	HD 6000	1.8 GHz	2.9 GHz	2.7 GHz	15 W	600 MHz / 9.5 W	300 MHz	1 GHz	3 MB	Q1 2015	$315
			5300U	HD 5500	2.3 GHz	2.9 GHz	2.7 GHz	15 W	600 MHz / 7.5 W	300 MHz	900 MHz	3 MB	Q1 2015	$281
			5287U	Iris 6100	2.9 GHz	3.3 GHz	3.3 GHz	28 W	600 MHz / 23 W	300 MHz	1.1 GHz	3 MB	Q1 2015	$315
			5257U	Iris 6100	2.7 GHz	3.1 GHz	3.1 GHz	28 W	600 MHz / 23 W	300 MHz	1.05 GHz	3 MB	Q1 2015	$315
			5250U	HD 6000	1.6 GHz	2.7 GHz	2.5 GHz	15 W	600 MHz / 9.5 W	300 MHz	950 MHz	3 MB	Q1 2015	$315
			5200U	HD 5500	2.2 GHz	2.7 GHz	2.5 GHz	15 W	600 MHz / 7.5 W	300 MHz	900 MHz	3 MB	February 2015^[27]	$281
		Core i3	5157U	Iris 6100	2.5 GHz	N/A	N/A	28 W	600 MHz / 23 W	300 MHz	1 GHz	3 MB	January 2015	$315
			5020U	HD 5500	2.2 GHz	N/A	N/A	15 W	600 MHz / 10 W	300 MHz	900 MHz	3 MB	March 2015	$281
			5015U	HD 5500	2.1 GHz	N/A	N/A	15 W	600 MHz / 10 W	300 MHz	850 MHz	3 MB	March 2015	$275
			5010U	HD 5500	2.1 GHz	N/A	N/A	15 W	600 MHz / 10 W	300 MHz	900 MHz	3 MB	January 2015	$281
			5005U	HD 5500	2.0 GHz	N/A	N/A	15 W	600 MHz / 10 W	300 MHz	850 MHz	3 MB	January 2015	$275
		Pentium	3825U	HD Graphics	1.9 GHz	N/A	N/A	15 W	600 MHz / 10 W	300 MHz	850 MHz	2 MB	March 2015
	2 (2)	Pentium	3805U	HD Graphics	1.9 GHz	N/A	N/A	15 W	600 MHz / 10 W	100 MHz	800 MHz	2 MB	Q1 2015	$161
		Celeron	3755U	HD Graphics	1.7 GHz	N/A	N/A	15 W	600 MHz / 10 W	100 MHz	800 MHz	2 MB	Q1 2015	$107
		Celeron	3205U	HD Graphics	1.5 GHz	N/A	N/A	15 W	600 MHz / 10 W	100 MHz	800 MHz	2 MB	Q1 2015	$107

Target segment	Cores (Threads)	Processor Branding & Model		GPU Model	Programmable TDP^[28]^:69–72				CPU Turbo	Graphics Clock rate		L3 Cache	Release Date	Price (USD)
Target segment	Cores (Threads)	Processor Branding & Model		GPU Model	SDP^[29]^[30]^:71	cTDP down^[a]	Nominal TDP^[b]	cTDP up^[c]	1-core	Normal	Turbo	L3 Cache	Release Date	Price (USD)
Mainstream	2 (4)^[31]	Core M (vPro)	5Y71	HD 5300 (GT2)^[32]	3.5 W	3.5 W / 600 MHz	4.5 W / 1.2 GHz	6 W / 1.4 GHz	2.9 GHz	300 MHz	900 MHz	4 MB	October 27, 2014 (2014-10-27)	$281
		Core M (vPro)	5Y70		N/A	N/A	4.5 W / 1.1 GHz	N/A	2.6 GHz	100 MHz	850 MHz		September 5, 2014 (2014-09-05)	$281
		Core M	5Y51		3.5 W	3.5 W / 600 MHz	4.5 W / 1.1 GHz	6 W / 1.3 GHz	2.6 GHz	300 MHz	900 MHz		October 27, 2014 (2014-10-27)	$281
			5Y31				4.5 W / 900 MHz	6 W / 1.1 GHz	2.4 GHz		850 MHz
			5Y10c				4.5 W / 800 MHz	6 W / 1 GHz	2.0 GHz		800 MHz
			5Y10a		N/A	N/A		N/A		100 MHz			September 5, 2014 (2014-09-05)	$281
			5Y10^[33]		N/A	4 W / ? MHz		N/A		100 MHz			September 5, 2014 (2014-09-05)	$281

When a cooler or quieter mode of operation is desired, this mode specifies a lower TDP and lower guaranteed frequency versus the nominal mode.^[28]^:71–72
This is the processor's rated frequency and TDP.^[28]^:71–72
When extra cooling is available, this mode specifies a higher TDP and higher guaranteed frequency versus the nominal mode.^[28]^:71–72

Server processors

Target segment	Cores (threads)	Processor branding and model		GPU model	Base frequency	Turbo frequency		TDP	Socket	Memory		L3 cache	Release date	Price (USD)
Target segment	Cores (threads)	Processor branding and model		GPU model	Base frequency	Single core	All cores	TDP	Socket	Type	Channel	L3 cache	Release date	Price (USD)
SoC server	8 (16)	Xeon D	D-1540	N/A	2 GHz	N/A	2.6 GHz	45 W	FCBGA 1667	DDR4	Dual	12 MB	Q1 2015	$581
SoC server	4 (8)	Xeon D	D-1520	N/A	2.2 GHz	N/A	2.6 GHz	45 W	FCBGA 1667	DDR4	Dual	6 MB	Q1 2015	$199

Target segment	Cores (threads)	Processor branding and model		GPU model	CPU clock rate		Graphics clock rate		L3 cache	TDP	Release date	Release price (USD) tray / box	Motherboard
Target segment	Cores (threads)	Processor branding and model		GPU model	Normal	Turbo	Normal	Turbo	L3 cache	TDP	Release date	Release price (USD) tray / box	Socket	Interface	Memory
Server	4 (8)	Xeon E3 v4	1285v4	HD (P6300)	3.5 GHz	3.8 GHz	300 MHz	1.15 GHz	6 MB	95 W	Q2 15	$556 / —	LGA 1150	DMI 2.0 PCIe 3.0	DDR3 or DDR3L 1333/1600/1866 with ECC
			1285Lv4		3.3 GHz	3.8 GHz		1.15 GHz		65 W		$445 / —
			1265Lv4		2.3 GHz	3.3 GHz		1.05 GHz		35 W		$417 / —

Roadmap and history

Main article: Intel Tick-Tock

On September 10, 2013, Intel showcased the Broadwell 14 nm processor in a demonstration at IDF. Intel CEO Brian Krzanich claimed that the chip would allow systems to provide a 30 percent improvement in power use over the Haswell chips released in mid-2013. Krzanich also claimed that the chips would ship by the end of 2013;^[34] however, the shipment was delayed due to low yields from Intel's 14 nm process.^[35]

On October 21, 2013, a leaked Intel roadmap indicated a late 2014 or early 2015 release of the K-series Broadwell on the LGA 1150 platform, in parallel with the previously announced Haswell refresh. This will coincide with the release of Intel's 9-series chipset, which may be required for Broadwell processors due to a change in power specifications for its LGA 1150 socket.^[36]^[37]

On May 18, 2014, Reuters quoted Intel's CEO promising that Broadwell-based PCs will be on shelves for the holiday season, but probably not for the back-to-school shopping.^[38]

Mobile CPUs are expected in Q4 2014 and high-performance quad-core CPUs in 2015. The mobile CPUs will benefit from the reduced energy consumption of the die shrink.^[39]^[40]

On June 18, 2014, Intel told CNET that while some specialized Broadwell-based products would be out in Q4 2014, "broader availability" (including mobile CPUs) would only happen in 2015.^[41]

As of July 2014, Broadwell CPUs are available to Intel's hardware partners in sample quantities.^[42] Intel is expected to release 17 Broadwell U series family microprocessors at CES 2015.^[43] Also, according to a leak posted on vr-zone, Broadwell-E chips will be available in 2016.^[44]

On August 11, 2014, Intel unveiled formally its 14 nm manufacturing process, which is used for Broadwell, and indicated that mobile variants of the process will be known as Core M products. Additionally, Core M products were announced to be shipping during the end of 2014, with desktop variants shipping shortly after.^[45]

With Broadwell, Intel focused mainly on laptops, miniature desktops, and all-in-one systems.^[46] This left traditional desktop users with no new socketed CPU options beyond fourth-generation Haswell, which first arrived in 2013. Even though the company finally introduced two Broadwell desktop chips in the summer of 2015, it launched its high-end sixth-generation Skylake CPUs very shortly thereafter. In September 2015, Kirk Skaugen, senior vice president and general manager of Intel's Client Computing Group, admitted that skipping desktops with Broadwell was a poor decision. Between the end-of-life for Windows XP in 2014 and the lack of new desktop chips, Intel has not given desktop PC users any good reasons to upgrade in 2015.^[47]

Releases

On September 5, 2014, Intel launched the first three Broadwell-based processors that belong to the low-TDP Core M family, Core M 5Y10, Core M 5Y10a and Core M 5Y70.^[48]

On October 9, 2014, the first laptop with Broadwell Intel Core M 5Y70 CPU, Lenovo Yoga 3 Pro, was launched.^[49]

On October 31, 2014, four more Broadwell based CPUs were launched belonging to Core M Family, increasing the number of launched Broadwell CPUs to seven.^[50]

On January 5, 2015, 17 additional Broadwell laptop CPUs were launched for the Celeron, Pentium and Core i3, i5 and i7 series.^[51]

Notes

1 2 Implemented as eDRAM and serving primarily to increase the performance of integrated GPU, while being shared with the CPU.

References

↑ "22nm Details" (PDF) (presentation). Intel. Retrieved January 4, 2012.
↑ Demerjian, Charlie. "After Intel's Haswell comes Broadwell". SemiAccurate. Retrieved January 4, 2012.
↑ Broekhuijsen, Niels (May 22, 2014). "Intel Broadwell CPUs to Arrive Later This Year". Tom's Hardware. Retrieved May 31, 2014.
↑ "Lower-end desktop CPUs won’t get Broadwell, will need to wait for Skylake". Ars Technica.
↑ Reynolds, Sam (August 26, 2013). "Intel's 9-series chipsets will support Broadwell". vr-zone.com. Archived from the original on November 20, 2013. Retrieved November 20, 2013.
1 2 3 "Intel Broadwell Production Plan Leaked – BDW-H Delayed To May 2015". WCCFTech. Retrieved May 21, 2014.
1 2 "Intel’s 14nm Process ‘Broadwell’ Lineup Details Leaked". WCCFTech. Retrieved December 12, 2013.
↑ Ian Cutress (June 3, 2014). "Intel Keynote at Computex 2014: 14nm Core-M, SoFIA, Devil’s Canyon, DC P3700 and RealSENSE". AnandTech. Retrieved June 5, 2014.
↑ "Intel Broadwell GPUs to use HD 5x00, Iris 6100 and Iris Pro 6200 branding". cpu-world.com.
↑ "Intel Broadwell Core i7-5775C and Core i5-5675C Processors With Iris Pro Graphics 6200 Detailed – Launching in Q2 2015". wccftech.com. March 23, 2015. Retrieved March 24, 2015.
↑ Anton Shilov (May 25, 2015). "Skylake Purley: Intel Xeon E5 and E7 Platform Update". xbitlabs.com. Retrieved May 25, 2015.
↑ Valich, Theo (January 10, 2014). "Intel Brickland & Grantley Platforms Revealed: Ivy Bridge-EX, Haswell-EX, Broadwell-EX". Vr-zone.com. Retrieved January 19, 2014.
↑ Novakovic, Nebojsa (January 10, 2014). "Socket 2011 to become the dominant Intel high end physical format even on Xeon EX – but different pin-outs, of course". Vr-zone.com. Retrieved January 19, 2014.
↑ "Intel Software Development Emulator | Intel Developer Zone". Software.intel.com. July 23, 2013. Retrieved October 16, 2013.
↑ Intel Architecture Instruction Set Extensions Programming Reference (Document number 319433-013B) // Intel, July 2012, Chapter 9 "ADDITIONAL NEW INSTRUCTIONS"
↑ New Instructions Supporting Large Integer Arithmetic on Intel Architecture Processors (Document number 327831 -001) // Intel, August 2012
1 2 Intel C++ Composer XE 2013 for Windows* Installation Guide and Release Notes (Document number: 321414-004US) // Intel, October 4, 2012; section "3.2.4 Inline assembly and intrinsic support for Intel architecture code named Broadwell added to Composer XE 2013 Update 1", page 13
↑ "VA-API 1.3 Readies Broadwell Support, Adds VP8 Decoding". Phoronix.com. March 18, 2014. Retrieved June 10, 2015.
↑ "VA-API Adds Support For VP8 Video Encoding". Phoronix.com. July 19, 2014. Retrieved June 10, 2015.
↑ "Intel Broadwell GT3 Graphics Have Dual BSD Rings". Phoronix.com. Retrieved April 17, 2014.
↑ "Intel® Iris™, Iris™ Pro, and HD Graphics Production Driver for Windows® 7, 8.1, & 10". Intel® Download Center.
↑ Release notes for driver version 15.40.10.64.4300 & 15.40.10.32.4300
↑ "The Compute Architecture of Intel Processor Graphics Gen8".
↑ Cutress, Ian. "Broadwell GPU Improvements". Retrieved November 24, 2015.
1 2 "Intel launches Broadwell-H chips for desktops and laptops, but world waits for 'Skylake'". Retrieved June 2, 2015.
↑ http://www8.hp.com/h20195/v2/GetPDF.aspx/c04760481.pdf
↑ "Aldi verkoopt laptop met processor van de 5de generatie". Retrieved February 18, 2015.
1 2 3 4 "4th Generation Intel Core processor based on Mobile M-Processor and H-Processor Lines Datasheet, Volume 1 of 2" (PDF). intel.com. December 2013. Retrieved December 22, 2013. Configurable TDP (cTDP) and Low-Power Mode (LPM) form a design vector where the processor behavior and package TDP are dynamically adjusted to a desired system performance and power envelope. [...] With cTDP, the processor is now capable of altering the maximum sustained power with an alternate guaranteed frequency. Configurable TDP allows operation in situations where extra cooling is available or situations where a cooler and quieter mode of operation is desired.
↑ "The technical details behind Intel's 7 Watt Ivy Bridge CPUs". arstechnica.com. January 14, 2013. Retrieved December 22, 2013. If the CPU needs to work hard for an extended period of time and the laptop gets warmer, it will slowly ramp down its speed until it's operating at its stated TDP. [...] There are two OEM-configurable "power level" states that define how quick the CPU can be in these situations: PL2 tells the processor how much power it's allowed to use when it needs a short burst of speed, and PL1 defines how quickly the processor can run under sustained load. [...] This is at the heart of what Intel is doing with the Y-series processors: their maximum TDP has been lowered four watts, from 17 to 13. Intel is also validating them for use at two lower PL1 values: 10 watts and 7 watts. This is where the marketing we discussed earlier comes in—rather than keeping these values under the covers as it has so far been content to do, Intel has taken that lowest value, put it on its product pages, and called it SDP.
↑ "4th Generation Intel Core processor based on Mobile U-Processor and Y-Processor Lines Datasheet, Volume 1 of 2" (PDF). intel.com. December 2013. Retrieved December 22, 2013.
↑ Ian Cutress. "Intel’s Core M Strategy: CPU Specifications for 9mm Fanless Tablets and 2-in-1 Devices". Retrieved January 6, 2015.
↑ "Intel launches three Core M CPUs, promises more Broadwell "early 2015"". Ars Technica. Retrieved January 6, 2015.
↑ "Details of first Broadwell "Y" mobile processors". cpu-world.com. July 2014. Retrieved January 6, 2015.
↑ "Intel reveals 14nm PC, declares Moore's Law 'alive and well'". The Register. September 10, 2013. Retrieved September 28, 2014.
↑ "Intel delays Broadwell PC chip production to early next year". CNET. October 15, 2013. Retrieved September 28, 2014.
↑ "Intel's Broadwell-K launching at end of 2014 according to new roadmap". vr-zone.com. October 21, 2013. Retrieved October 24, 2013.
↑ Shilov, Anton (August 29, 2013). "Intel Changes Plans: Core i "Broadwell" Processors Will Be Available in LGA Packaging, But There Is a Catch". Xbit Labs. Retrieved October 24, 2013.
↑ "Exclusive: Intel CEO promises Broadwell PCs on shelves for holidays". reuters.com. May 18, 2014. Retrieved May 17, 2014.
↑ "Computex 2014: Intels Broadwell kommt rechtzeitig zum Weihnachtsgeschäft". Heise.de. May 22, 2014. Retrieved May 31, 2014.
↑ Chris.L (May 19, 2014). "2014 年底前絕對見到，14nm Broadwell 處理器最快在 37 周出貨". chinese.vr-zone.com. Retrieved July 19, 2014.
↑ Crothers, Brooke. "Intel's next-gen processor, Broadwell, is (mostly) a 2015 thing". CNET. Retrieved July 19, 2014.
↑ Mark Hachman (July 15, 2014). "Intel shipping Broadwell, but next-gen Skylake chip could slip". PCWorld. Retrieved July 19, 2014.
↑ "Intel to launch Broadwell "U" series CPUs at CES 2015".
↑ "Intel's Extreme Broadwell-E chips reportedly not coming until early 2016". PC Gamer.
↑ Hachman, Mark (August 11, 2014). "Intel aims next-gen 14nm 'Broadwell' technology at fanless tablets, Ultrabooks". PCWorld. Retrieved August 15, 2014.
↑ "Intel regrets skipping Broadwell desktop CPUs". September 15, 2015. Retrieved October 10, 2015.
↑ "Intel regrets skipping Broadwell desktop CPUs". September 15, 2015. Retrieved October 10, 2015.
↑ "Intel launches first Broadwell processors".
↑ "The first Core M laptop paints a depressing, mediocre picture for Intel’s Broadwell - ExtremeTech". ExtremeTech.
↑ "Intel to release Core M 5Y10c, 5Y31, 5Y51 and 5Y71 processors".
↑ "Broadwell U arrives: Faster laptop CPUs and GPUs from Core i7 to Celeron". ArsTechnica.

External links

Intel to launch Broadwell "U" series CPUs at CES 2015

Intel processors

Discontinued

BCD oriented (4-bit)	4004 (1971) 4040 (1974)

pre-x86 (8-bit)	8008 (1972) 8080 (1974) 8085 (1977)

Early x86 (16-bit)	8086 (1978) 8088 (1979) 80186 (1982) 80188 (1982) 80286 (1982)

x87 (external FPUs)	8/16-bit databus 8087 (1980) 16-bit databus 80187 80287 80387SX 32-bit databus 80387DX 80487

IA-32 (32-bit)	80386 SX 376 EX 80486 SX DX2 DX4 SL RapidCAD OverDrive A100/A110 Celeron (1998) M D (2004) Pentium Original OverDrive Pro II II OverDrive III 4 M Dual-Core Core Solo Duo

x86-64 (64-bit)	Celeron D Dual-Core Pentium 4 D Extreme Edition Dual-Core Core 2 i7 (some)

Other	CISC iAPX 432 RISC i860 i960 StrongARM XScale

Current

IA-32 (32-bit)	EP80579 Atom CE SoC Quark

x86-64 (64-bit)	Atom CE SoC Celeron Pentium Core i3 i5 i7 m3 m5 m7 Xeon E7 E5 E3 Phi

EPIC	Itanium

Lists

Atom Celeron Core 2 i3 i5 i7 M Itanium Pentium Pro II III 4 D M Dual-Core Xeon

Related

Chipsets PCHs SCHs ICHs PIIXs GPUs Codenames GMA HD and Iris Graphics

Microarchitectures

P5	800 nm P5 600 nm P54C 350 nm P54CS P55C 250 nm Tillamook

P6 / Pentium M / Enhanced Pentium M	500 nm P6 350 nm P6 Klamath 250 nm Mendocino Dixon Tonga Covington Deschutes Katmai Drake Tanner 180 nm Coppermine Coppermine T Timna Cascades 130 nm Tualatin Banias 90 nm Dothan Stealey Tolapai Canmore 65 nm Yonah Sossaman

NetBurst	180 nm Willamette Foster 130 nm Northwood Gallatin Prestonia 90 nm Tejas and Jayhawk Prescott Smithfield Nocona Irwindale Cranford Potomac Paxville 65 nm Cedar Mill Presler Dempsey Tulsa

Core / Penryn	65 nm Merom-L Merom Conroe-L Allendale Conroe Kentsfield Woodcrest Clovertown Tigerton 45 nm Penryn Penryn-QC Wolfdale Yorkfield Wolfdale-DP Harpertown Dunnington

Bonnell / Saltwell	45 nm Silverthorne Diamondville Pineview Lincroft Tunnel Creek Stellarton Sodaville Groveland 32 nm Cedarview Penwell Cloverview Berryville Centerton

Nehalem / Westmere	45 nm Clarksfield Lynnfield Jasper Forest Bloomfield Gainestown (Nehalem-EP) Beckton (Nehalem-EX) 32 nm Arrandale Clarkdale Gulftown (Westmere-EP) Westmere-EX

Sandy Bridge / Ivy Bridge	32 nm Sandy Bridge Sandy Bridge-E Gladden 22 nm Ivy Bridge Ivy Bridge-EP Ivy Bridge-EX

Haswell / Broadwell	22 nm Haswell 14 nm Broadwell

Silvermont / Airmont	22 nm Valleyview Tangier Anniedale 14 nm Cherryview

Skylake/Kaby Lake/Cannonlake	14 nm Skylake Kaby Lake 10 nm Cannonlake

Intel CPU core roadmaps from NetBurst and P6 to Cannonlake

NetBurst

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Core

Nehalem

Sandy Bridge

Haswell

Skylake

Bonnell

Silvermont

Goldmont

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