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GPU Comparison
AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 6850 X2
AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 6850 X2
VS
AMD Radeon HD 7870 GHz Edition
AMD Radeon HD 6850 X2
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 2GB VRAM Radeon HD 6850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7870 GHz Edition 's Advantages
Released 6 months late
Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)
320 additional rendering cores
Lower TDP (175W vs 254W)
Score
Benchmark
FP32 (float)
Radeon HD 7870 GHz Edition
+66%
2.56 TFLOPS
Radeon HD 6850 X2
1.536 TFLOPS
Radeon HD 7870 GHz Edition
VS
Radeon HD 6850 X2
Graphics Card
Mar 2012
Release Date
Sep 2011
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1200 MHz
Memory Clock
1050 MHz
Memory
2GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
153.6GB/s
Bandwidth
134.4GB/s
Render Config
-
SM Count
-
20
Compute Units
12
1280
Shading Units
960
80
TMUs
48
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
512 KB
Theoretical Performance
32.00 GPixel/s
Pixel Rate
25.60 GPixel/s
80.00 GTexel/s
Texture Rate
38.40 GTexel/s
-
FP16 (half)
-
2.560 TFLOPS
FP32 (float)
1.536 TFLOPS
160.0 GFLOPS
FP64 (double)
-
Graphics Processor
Pitcairn
GPU Name
Barts
Pitcairn XT (215-0828047)
GPU Variant
Barts PRO (215-0798006)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
2.8 billion
Transistors
1.7 billion
212 mm²
Die Size
255 mm²
Board Design
175W
TDP
254W
450 W
Suggested PSU
600 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1
2x 6-pin
Power Connectors
2x 8-pin
Graphics Features
12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
CUDA
-
5.1
Shader Model
5.0
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