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GPU Comparison
AMD Radeon HD 6870 vs AMD Radeon HD 6390
AMD Radeon HD 6870 vs AMD Radeon HD 6390
VS
AMD Radeon HD 6870
AMD Radeon HD 6390
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 1024MB VRAM Radeon HD 6390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 16.00GB/s)
800 additional rendering cores
AMD Radeon HD 6390 's Advantages
Released 9 months late
Lower TDP (39W vs 151W)
Score
Benchmark
FP32 (float)
Radeon HD 6870
+472%
2.016 TFLOPS
Radeon HD 6390
0.352 TFLOPS
Radeon HD 6870
VS
Radeon HD 6390
Graphics Card
Oct 2010
Release Date
Jul 2011
Northern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1050 MHz
Memory Clock
500 MHz
Memory
1024MB
Memory Size
1024MB
GDDR5
Memory Type
DDR2
256bit
Memory Bus
128bit
134.4GB/s
Bandwidth
16.00GB/s
Render Config
-
SM Count
-
14
Compute Units
4
1120
Shading Units
320
56
TMUs
16
32
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
4.400 GPixel/s
50.40 GTexel/s
Texture Rate
8.800 GTexel/s
-
FP16 (half)
-
2.016 TFLOPS
FP32 (float)
352.0 GFLOPS
-
FP64 (double)
-
Graphics Processor
Barts
GPU Name
Redwood
Barts XT (215-0798000)
GPU Variant
Redwood LE
TeraScale 2
Architecture
TeraScale 2
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
1.7 billion
Transistors
0.627 billion
255 mm²
Die Size
104 mm²
Board Design
151W
TDP
39W
450 W
Suggested PSU
200 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
2x 6-pin
Power Connectors
None
Graphics Features
11.2 (11_0)
DirectX
11.2 (11_0)
4.4
OpenGL
4.4
1.2
OpenCL
1.2
N/A
Vulkan
N/A
-
CUDA
-
5.0
Shader Model
5.0
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