GeForce 800M series

GeForce 800M Series
Release date March 12, 2014[1]
Codename GK104
GM10x
Architecture Kepler
Maxwell
Models

GeForce Series

  • GeForce GTX Series
Transistors and fabrication process 28 nm
Cards
Entry-level GeForce 800M
GeForce 820M
GeForce 830M
GeForce 840M
Mid-range GeForce GTX 850M
GeForce GTX 860M
High-end GeForce GTX 870M
Enthusiast GeForce GTX 880M
API support
Direct3D Direct3D 12.0 (feature level 11_0) [2][3]
OpenCL OpenCL 1.2
OpenGL OpenGL 4.6[4]
Vulkan Vulkan 1.0
SPIR-V
History
Variant GeForce 700 series
Successor GeForce 900 series

The GeForce 800M Series is a family of graphics processing units by Nvidia for laptop PCs.[2] It consists of rebrands of mobile versions of the GeForce 700 series[2] and some newer chips that are lower end compared to the rebrands.

The GeForce 800 series name was originally planned to be used for both desktop and mobile chips based on the Maxwell microarchitecture (GM-codenamed chips), named after the Scottish theoretical physicist James Clerk Maxwell, which was previously introduced into the GeForce 700 series in the GTX 750 and GTX 750 Ti, released on February 18, 2014.[5] However, because mobile GPUs under the GeForce 800M series had already been released using the Kepler architecture, Nvidia decided to rename its GeForce 800 series desktop GPUs as the GeForce 900 series.[2]

The Maxwell microarchitecture, the successor to Kepler microarchitecture, was the first Nvidia architecture to feature an integrated ARM CPU of its own.[6] This enabled Maxwell GPUs to be more independent from the main CPU according to Nvidia's CEO Jen-Hsun Huang.[7] Nvidia expects three major things from the Maxwell architecture: improved graphics capabilities, simplified programming as well as better energy-efficiency compared to the GeForce 700 Series and GeForce 600 Series [8]

Architecture

First generation Maxwell (GM10x)

First generation Maxwell GM107/GM108 provides few consumer-facing additional features; Nvidia instead focused on power efficiency. Nvidia's video encoder, NVENC, is 1.5 to 2 times faster than on Kepler-based GPUs meaning it can encode video at 6 to 8 times playback speed.[5] Nvidia also claims an 8 to 10 times performance increase in PureVideo Feature Set E video decoding due to the video decoder cache paired with increases in memory efficiency. However, HEVC is not supported for full hardware decoding, relying on a mix of hardware and software decoding.[5] When decoding video, a new low power state "GC5" is used on Maxwell GPUs to conserve power.[5]

Nvidia increased the amount of L2 cache on GM107 to 2 MB, up from 256 KB on GK107, reducing the memory bandwidth needed. Accordingly, Nvidia cut the memory bus to 128 bit on GM107 from 192 bit on GK106, further saving power.[5] Nvidia also changed the streaming multiprocessor design from that of Kepler (SMX), naming it SMM. The layout of SMM units is partitioned so that each of the four warp schedulers controls isolated FP32 CUDA cores, load/store units and special function units, unlike Kepler, where the warp schedulers share the resources. Texture units and FP64 CUDA cores are still shared.[5] SMM allows for a finer-grain allocation of resources than SMX, saving power when the workload isn't optimal for shared resources. Nvidia claims a 128 CUDA core SMM has 90% of the performance of a 192 CUDA core SMX.[5]

GM107/GM108 supports CUDA Compute Capability 5.0 compared to 3.5 on GK110/GK208 GPUs and 3.0 on GK10x GPUs. Dynamic Parallelism and HyperQ, two features in GK110/GK208 GPUs, are also supported across the entire Maxwell product line.

Maxwell provides native shared memory atomic operations for 32-bit integers and native shared memory 32-bit and 64-bit compare-and-swap (CAS), which can be used to implement other atomic functions.

Maxwell supports DirectX 12.[9]

Products

Products formerly placed into the GeForce 800 (8xx) Series

Nvidia has announced that the company skipped the GeForce 800 series for desktop graphics cards, most likely because the GTX 800M series consists of high-end Kepler and low-end Maxwell based components. Instead, Nvidia had announced that the newly renamed GeForce GTX 980 and GTX 970 will be introduced formally on the 19th of September 2014.[2]

GeForce 800M (8xxM) Series

The GeForce 800M Series is designed for notebooks. The processing power is obtained by multiplying shader clock speed, the number of cores and how many instructions the cores are capable of performing per cycle. Note that all GK104 based GPUs are using the older Kepler Architecture and the 820M uses GF117 cores based on the Fermi Architecture.

Model Launch Code name Fab (nm) Bus interface Core config1 Clock speed Fillrate Memory API support (version) Processing Power2
(GFLOPS)		 TDP (watts)
Core (MHz) Shader (MHz) Memory (MT/s) Pixel (GP/s) Texture (GT/s) Size (MiB) Bandwidth (GB/s) Bus type Bus width (bit) DirectX OpenGL
GeForce 800M [10] March 17, 2014 GF117 28 PCIe 2.0 x8 48:8:8 738 1476 2000 5.9 5.9 2048 14.4 DDR3 64 12.0 (11_0) 4.6 141.7 15
GeForce 820M [11] February 2014 PCIe 2.0 x16 96:16:4 719-954 1438-1908 2.9-3.8 11.5-15.3 16 276.1-366.3 15
GeForce 830M [12] March 12, 2014 GM108 PCIe 3.0 x16 256:16:8
(2 SMM)		 1029 1029 8.2 16.5 14.4 790.3 30
GeForce 840M [13] 384:24:8
(3 SMM)		 1029 1029 8.2 24.7 16 790.3 30
GeForce GTX 850M [14] GM107 640:40:16
(5 SMM)		 936+Boost 936+Boost 5000 14.0 35.0 2048
4096		 32 to 80 DDR3 or GDDR5 128 1198.1 40
GeForce GTX 860M [15] GM107
GK104		 640:40:16
(5 SMM)
1152:96:16
(6 SMX)		 1029+Boost
797+Boost		 1029+Boost
797+Boost		 16.5
12.8		 41.2
76.5		 80 GDDR5 1317.1
1836.3		 40-45
75
GeForce GTX 870M [16] GK104 1344:112:24
(7 SMX)		 941+Boost 941+Boost 22.6 105.4 3072
6144		 120 192 2529.4 100
GeForce GTX 880M [17] 1536:128:32
(8 SMX)		 954+Boost 954+Boost 30.5 122.1 4096
8192		 160 256 2930.7 105

Successor Architecture

The next generation of mobile cards was the 900M series, which continued usage of the Maxwell archicture. Nvidia followed the Maxwell architecture with the Pascal architecture in 2016 in the GeForce 10 series.

Chipset table

See also

References

  1. ↑ Burnes, Andrew (March 12, 2014). "Introducing GTX 800M Notebook GPUs". GeForce.com. Nvidia. Retrieved August 31, 2014.
  2. 1 2 3 4 5 Shilov, Anton (August 29, 2014). "Nvidia to skip GeForce GTX 800 series, to introduce GeForce GTX 970, GTX 980 in mid-September". KitGuru.
  3. ↑ Kowaliski, Cyril (March 21, 2014). "DirectX 12 will also add new features for next-gen GPUs". The Tech Report. Retrieved April 1, 2014.
  4. ↑ "NVIDIA GeForce GTX 880M". TechPowerUp.
  5. 1 2 3 4 5 6 7 Smith, Ryan; T S, Ganesh (18 February 2014). "The NVIDIA GeForce GTX 750 Ti and GTX 750 Review: Maxwell Makes Its Move". AnandTech. Archived from the original on 18 February 2014. Retrieved 18 February 2014.
  6. ↑ Nvidia Maxwell to be first GPU with ARM CPU in 2013, Guru3d.com
  7. 1 2 "Nvidia Maxwell Graphics Processors to Have Integrated ARM General-Purpose Cores - X-bit labs". xbitlabs.com.
  8. ↑ "Nvidia: Next-Generation Maxwell Architecture Will Break New Grounds - X-bit labs". xbitlabs.com.
  9. ↑ "DirectX 12: A Major Stride for Gaming". The Official NVIDIA Blog.
  10. ↑ "NVIDIA GeForce 800M". TechPowerUp.
  11. ↑ "GeForce 820M - Specifications - GeForce". geforce.com.
  12. ↑ "GeForce 830M - Specifications - GeForce". geforce.com.
  13. ↑ "GeForce 840M - Specifications - GeForce". geforce.com.
  14. ↑ "GeForce GTX 850M - Specifications - GeForce". geforce.com.
  15. ↑ "GeForce GTX 860M - Specifications - GeForce". geforce.com.
  16. ↑ "GeForce GTX 870M - Specifications - GeForce". geforce.com.
  17. ↑ "GeForce GTX 880M - Specifications - GeForce". geforce.com.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.