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GPU Comparison
AMD Radeon HD 6870 vs AMD Radeon HD 7870 GHz Edition
AMD Radeon HD 6870 vs AMD Radeon HD 7870 GHz Edition
VS
AMD Radeon HD 6870
AMD Radeon HD 7870 GHz Edition
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 2GB VRAM Radeon HD 7870 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 175W)
AMD Radeon HD 7870 GHz Edition 's Advantages
Released 1 years and 5 months late
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)
160 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6870
2.016 TFLOPS
Radeon HD 7870 GHz Edition
+26%
2.56 TFLOPS
Radeon HD 6870
VS
Radeon HD 7870 GHz Edition
Graphics Card
Oct 2010
Release Date
Mar 2012
Northern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1050 MHz
Memory Clock
1200 MHz
Memory
1024MB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
134.4GB/s
Bandwidth
153.6GB/s
Render Config
-
SM Count
-
14
Compute Units
20
1120
Shading Units
1280
56
TMUs
80
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
512 KB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
32.00 GPixel/s
50.40 GTexel/s
Texture Rate
80.00 GTexel/s
-
FP16 (half)
-
2.016 TFLOPS
FP32 (float)
2.560 TFLOPS
-
FP64 (double)
160.0 GFLOPS
Graphics Processor
Barts
GPU Name
Pitcairn
Barts XT (215-0798000)
GPU Variant
Pitcairn XT (215-0828047)
TeraScale 2
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.7 billion
Transistors
2.8 billion
255 mm²
Die Size
212 mm²
Board Design
151W
TDP
175W
450 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
2x 6-pin
Graphics Features
11.2 (11_0)
DirectX
12 (11_1)
4.4
OpenGL
4.6
1.2
OpenCL
1.2
N/A
Vulkan
1.2
-
CUDA
-
5.0
Shader Model
5.1
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