GeForce 800M series
| Release date | March 12, 2014 |
|---|---|
| Codename | GK104 GM10x |
| Architecture |
Kepler Maxwell |
| Models | GeForce Series
|
| Fabrication process and transistors | 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) |
| OpenCL | OpenCL 1.2 |
| OpenGL | OpenGL 4.5 |
| 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. It consists of rebrands of mobile versions of the GeForce 700 series 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. 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.
The Maxwell microarchitecture, the successor to Kepler microarchitecture, was the first Nvidia architecture to feature an integrated ARM CPU of its own. This enabled Maxwell GPUs to be more independent from the main CPU according to Nvidia's CEO Jen-Hsun Huang. 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
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. 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. When decoding video, a new low power state "GC5" is used on Maxwell GPUs to conserve power.
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