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GPU Comparison
AMD Radeon RX 580 vs AMD Radeon HD 6870
AMD Radeon RX 580 vs AMD Radeon HD 6870
VS
AMD Radeon RX 580
AMD Radeon HD 6870
We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 580 and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 580 's Advantages
Released 6 years and 6 months late
Boost Clock1340MHz
More VRAM (8GB vs 1GB)
Larger VRAM bandwidth (256.0GB/s vs 134.4GB/s)
1184 additional rendering cores
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 185W)
Score
Benchmark
FP32 (float)
Radeon RX 580
+206%
6.175 TFLOPS
Radeon HD 6870
2.016 TFLOPS
Radeon RX 580
VS
Radeon HD 6870
Graphics Card
Apr 2017
Release Date
Oct 2010
Polaris
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1257 MHz
Base Clock
-
1340 MHz
Boost Clock
-
2000 MHz
Memory Clock
1050 MHz
Memory
8GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
256.0GB/s
Bandwidth
134.4GB/s
Render Config
-
SM Count
-
36
Compute Units
14
2304
Shading Units
1120
144
TMUs
56
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
2 MB
L2 Cache
512 KB
Theoretical Performance
42.88 GPixel/s
Pixel Rate
28.80 GPixel/s
193.0 GTexel/s
Texture Rate
50.40 GTexel/s
6.175 TFLOPS
FP16 (half)
-
6.175 TFLOPS
FP32 (float)
2.016 TFLOPS
385.9 GFLOPS
FP64 (double)
-
Graphics Processor
Polaris 20
GPU Name
Barts
Polaris 20 XTX (215-0910038)
GPU Variant
Barts XT (215-0798000)
GCN 4.0
Architecture
TeraScale 2
GlobalFoundries
Foundry
TSMC
14 nm
Process Size
40 nm
5.7 billion
Transistors
1.7 billion
232 mm²
Die Size
255 mm²
Board Design
185W
TDP
151W
450 W
Suggested PSU
450 W
1x HDMI 2.0b 3x DisplayPort 1.4a
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
1x 8-pin
Power Connectors
2x 6-pin
Graphics Features
12 (12_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.2
Vulkan
N/A
-
CUDA
-
6.4
Shader Model
5.0
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