GPU Comparison
RADEON
AMD Radeon HD 6850 X2
CORE STATE
Barts
VRAM
2 GB
CLOCK SPEED
—
TDP
254 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
VS
GEFORCE
GeForce GTX 870M
CORE STATE
GK104
VRAM
3 GB
CLOCK SPEED
967 MHz
TDP
100 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
GTX 870M
Core Specs
Shading Units
960
1,344
+40.0%
Shaders
960
1,344
+40.0%
TMUs
48
112
+133.3%
ROPs
32
24
-25.0%
Compute Units
12
—
Clocks
Base Clock
—
941 MHz
Boost Clock
—
967 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
2 GB
3 GB
VRAM (MB)
2,048
3,072
+50.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
192 bit
Bandwidth
134.4 GB/s
120.0 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
384 KB
Performance
Pixel Rate
25.60 GPixel/s
27.08 GPixel/s
Texture Rate
38.40 GTexel/s
108.3 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
2.599 TFLOPS
FP64 (TFLOPS)
—
108.3 GFLOPS (1:24)
Power
TDP
254 W
100 W
TDP (W)
254
100
-60.6%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
None
Architecture
Architecture
TeraScale 2
Kepler
GPU Name
Barts
GK104
Generation
Northern Islands
(HD 6800)
GeForce 800M
Process Size
40 nm
28 nm
Transistors
1,700 million
3,540 million
Die Size
255 mm²
294 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
12.0M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
Vulkan
—
1.2.175
OpenCL
1.2
3.0
CUDA
—
3.0
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
MXM Module
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Portable Device Dependent
Bus Interface
PCIe 2.0 x16
MXM-B (3.0)
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
GeForce 700M
Successor
Southern Islands
GeForce 900M