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GPU Comparison
AMD Radeon HD 8870 OEM vs AMD Radeon R9 255 OEM
AMD Radeon HD 8870 OEM vs AMD Radeon R9 255 OEM
VS
AMD Radeon HD 8870 OEM
AMD Radeon R9 255 OEM
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 8870 OEM 's Advantages
Larger VRAM bandwidth (153.6GB/s vs 73.60GB/s)
768 additional rendering cores
AMD Radeon R9 255 OEM 's Advantages
Released 11 months late
Boost Clock930MHz
Lower TDP (65W vs 175W)
Score
Benchmark
FP32 (float)
Radeon HD 8870 OEM
+168%
2.56 TFLOPS
Radeon R9 255 OEM
0.952 TFLOPS
Radeon HD 8870 OEM
VS
Radeon R9 255 OEM
Graphics Card
Jan 2013
Release Date
Dec 2013
Sea Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
900 MHz
-
Boost Clock
930 MHz
1200 MHz
Memory Clock
1150 MHz
Memory
2GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
153.6GB/s
Bandwidth
73.60GB/s
Render Config
-
SM Count
-
20
Compute Units
8
1280
Shading Units
512
80
TMUs
32
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
32.00 GPixel/s
Pixel Rate
14.88 GPixel/s
80.00 GTexel/s
Texture Rate
29.76 GTexel/s
-
FP16 (half)
-
2.560 TFLOPS
FP32 (float)
952.3 GFLOPS
160.0 GFLOPS
FP64 (double)
59.52 GFLOPS
Graphics Processor
Pitcairn
GPU Name
Cape Verde
Pitcairn XT (215-0828047)
GPU Variant
Cape Verde PRX
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
1.5 billion
212 mm²
Die Size
123 mm²
Board Design
175W
TDP
65W
450 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
No outputs
2x 6-pin
Power Connectors
1x 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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