NVIDIA GeForce GTX 870M vs AMD Radeon HD 6850 X2
GPU Specs Compare
Graphics Card
Release Date
Mar 2014
Sep 2011
Generation
GeForce 800M
Northern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 2.0 x16
Clock Speeds
Base Clock
941 MHz
-
Boost Clock
967 MHz
-
Memory Clock
1250 MHz
1050 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
120.0GB/s
134.4GB/s
Render Config
Shading Units
1344
960
TMUs
112
48
ROPs
24
32
L1 Cache
16 KB (per SMX)
8 KB (per CU)
L2 Cache
384 KB
512 KB
Compute Units
-
12
Theoretical Performance
Pixel Rate
27.08 GPixel/s
25.60 GPixel/s
Texture Rate
108.3 GTexel/s
38.40 GTexel/s
FP32 (float)
2.599 TFLOPS
1.536 TFLOPS
FP64 (double)
108.3 GFLOPS
-
Graphics Processor
GPU Name
GK104
Barts
GPU Variant
N15E-GT-A2
Barts PRO(215-0798006)
Architecture
Kepler
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
3.54 billion
1.7 billion
Die Size
294 mm²
255 mm²
Board Design
TDP
100W
254W
Outputs
No outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
None
2x 8-pin
Suggested PSU
-
600 W
Graphics Features
DirectX
12 (11_0)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
3.0
1.2
Vulkan
1.1
N/A
CUDA
3.0
-
Shader Model
5.1
5.0