AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 7970
GPU Specs Compare
Graphics Card
Release Date
Mar 2012
Jan 2012
Generation
Southern Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1375 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
153.6GB/s
264.0GB/s
Render Config
Compute Units
20
32
Shading Units
1280
2048
TMUs
80
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
29.60 GPixel/s
Texture Rate
80.00 GTexel/s
118.4 GTexel/s
FP32 (float)
2.560 TFLOPS
3.789 TFLOPS
FP64 (double)
160.0 GFLOPS
947.2 GFLOPS
Graphics Processor
GPU Name
Pitcairn
Tahiti
GPU Variant
Pitcairn XT(215-0828047)
Tahiti XT(215-0821060)
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
4.313 billion
Die Size
212 mm²
352 mm²
Board Design
TDP
175W
250W
Suggested PSU
450 W
600 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
1.2
2.1 (1.2)
Vulkan
1.2
1.2.170
Shader Model
5.1
6.5 (5.1)
📊 Benchmark
3DMark Time Spy
-
2,310
3DMark Time Spy Extreme
-
1,209