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GPU Comparison
AMD Radeon HD 7870 XT vs AMD Radeon HD 7950
AMD Radeon HD 7870 XT vs AMD Radeon HD 7950
VS
AMD Radeon HD 7870 XT
AMD Radeon HD 7950
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 3GB VRAM Radeon HD 7950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7870 XT 's Advantages
Released 10 months late
Boost Clock975MHz
Lower TDP (185W vs 200W)
AMD Radeon HD 7950 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 192.0GB/s)
256 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 7870 XT
+4%
2.995 TFLOPS
Radeon HD 7950
2.867 TFLOPS
Radeon HD 7870 XT
VS
Radeon HD 7950
Graphics Card
Nov 2012
Release Date
Jan 2012
Southern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
925 MHz
Base Clock
-
975 MHz
Boost Clock
-
1500 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
192.0GB/s
Bandwidth
240.0GB/s
Render Config
-
SM Count
-
24
Compute Units
28
1536
Shading Units
1792
96
TMUs
112
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
31.20 GPixel/s
Pixel Rate
25.60 GPixel/s
93.60 GTexel/s
Texture Rate
89.60 GTexel/s
-
FP16 (half)
-
2.995 TFLOPS
FP32 (float)
2.867 TFLOPS
748.8 GFLOPS
FP64 (double)
716.8 GFLOPS
Graphics Processor
Tahiti
GPU Name
Tahiti
Tahiti LE (215-0821122)
GPU Variant
Tahiti PRO (215-0821056)
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
4.313 billion
352 mm²
Die Size
352 mm²
Board Design
185W
TDP
200W
450 W
Suggested PSU
550 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
2x 6-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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