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GPU Comparison
AMD Radeon HD 7850 vs AMD Radeon HD 7970
AMD Radeon HD 7850 vs AMD Radeon HD 7970
VS
AMD Radeon HD 7850
AMD Radeon HD 7970
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7850 and 3GB VRAM Radeon HD 7970 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7850 's Advantages
Lower TDP (130W vs 250W)
AMD Radeon HD 7970 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (264.0GB/s vs 153.6GB/s)
1024 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 7850
1.761 TFLOPS
Radeon HD 7970
+115%
3.789 TFLOPS
3DMark Time Spy
Radeon HD 7850
1312
Radeon HD 7970
+73%
2279
Radeon HD 7850
VS
Radeon HD 7970
Graphics Card
Mar 2012
Release Date
Dec 2011
Southern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1200 MHz
Memory Clock
1375 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
153.6GB/s
Bandwidth
264.0GB/s
Render Config
-
SM Count
-
16
Compute Units
32
1024
Shading Units
2048
64
TMUs
128
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
Theoretical Performance
27.52 GPixel/s
Pixel Rate
29.60 GPixel/s
55.04 GTexel/s
Texture Rate
118.4 GTexel/s
-
FP16 (half)
-
1.761 TFLOPS
FP32 (float)
3.789 TFLOPS
110.1 GFLOPS
FP64 (double)
947.2 GFLOPS
Graphics Processor
Pitcairn
GPU Name
Tahiti
Pitcairn PRO (215-0828062)
GPU Variant
Tahiti XT (215-0821060)
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
4.313 billion
212 mm²
Die Size
352 mm²
Board Design
130W
TDP
250W
300 W
Suggested PSU
600 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
1x 6-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Features
12 (11_1)
DirectX
12 (11_1)
4.6
OpenGL
4.6
1.2
OpenCL
1.2
1.2
Vulkan
1.2
-
CUDA
-
5.1
Shader Model
5.1
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