AMD Radeon HD 7850 vs AMD Radeon HD 7970 GHz Edition
GPU Specs Compare
Graphics Card
Release Date
Mar 2012
Jun 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
1500 MHz
Base Clock
-
1000 MHz
Boost Clock
-
1050 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
153.6GB/s
288.0GB/s
Render Config
Compute Units
16
32
Shading Units
1024
2048
TMUs
64
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
27.52 GPixel/s
33.60 GPixel/s
Texture Rate
55.04 GTexel/s
134.4 GTexel/s
FP32 (float)
1.761 TFLOPS
4.301 TFLOPS
FP64 (double)
110.1 GFLOPS
1075 GFLOPS
Graphics Processor
GPU Name
Pitcairn
Tahiti
GPU Variant
Pitcairn PRO(215-0828062)
Tahiti XT2(215-0821065)
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
130W
300W
Suggested PSU
300 W
700 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
1x 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
1.2
Vulkan
1.2
1.2
Shader Model
5.1
5.1
📊 Benchmark
3DMark Time Spy
1,334
-
3DMark Time Spy Extreme
325
-