AMD Radeon HD 6950 vs AMD Radeon HD 7870 GHz Edition
GPU Specs Compare
Graphics Card
Release Date
Dec 2010
Mar 2012
Generation
Northern Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1250 MHz
1200 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
153.6GB/s
Render Config
Compute Units
22
20
Shading Units
1408
1280
TMUs
88
80
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
25.60 GPixel/s
32.00 GPixel/s
Texture Rate
70.40 GTexel/s
80.00 GTexel/s
FP32 (float)
2.253 TFLOPS
2.560 TFLOPS
FP64 (double)
563.2 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Cayman
Pitcairn
GPU Variant
Cayman PRO(215-0807019)
Pitcairn XT(215-0828047)
Architecture
TeraScale 3
GCN 1.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
2.64 billion
2.8 billion
Die Size
389 mm²
212 mm²
Board Design
TDP
200W
175W
Suggested PSU
550 W
450 W
Outputs
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
2x 6-pin
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2
Shader Model
5.0
5.1