AMD Radeon HD 7970 GHz Edition vs AMD Radeon HD 6850
GPU Specs Compare
Graphics Card
Release Date
Jun 2012
Oct 2010
Generation
Southern Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
1000 MHz
-
Boost Clock
1050 MHz
-
Memory Clock
1500 MHz
1000 MHz
Memory
Memory Size
3GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.0GB/s
128.0GB/s
Render Config
Compute Units
32
12
Shading Units
2048
960
TMUs
128
48
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
33.60 GPixel/s
24.80 GPixel/s
Texture Rate
134.4 GTexel/s
37.20 GTexel/s
FP32 (float)
4.301 TFLOPS
1488 GFLOPS
FP64 (double)
1075 GFLOPS
-
Graphics Processor
GPU Name
Tahiti
Barts
GPU Variant
Tahiti XT2(215-0821065)
Barts PRO(215-0798006)
Architecture
GCN 1.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
4.313 billion
1.7 billion
Die Size
352 mm²
255 mm²
Board Design
TDP
300W
127W
Suggested PSU
700 W
300 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Power Connectors
1x 6-pin + 1x 8-pin
1x 6-pin
Graphics Features
DirectX
12 (11_1)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.2
N/A
Shader Model
5.1
5.0