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GPU Comparison
ATI Radeon HD 4870 vs AMD Radeon R9 255 OEM
ATI Radeon HD 4870 vs AMD Radeon R9 255 OEM
VS
ATI Radeon HD 4870
AMD Radeon R9 255 OEM
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
ATI Radeon HD 4870 's Advantages
Larger VRAM bandwidth (115.2GB/s vs 73.60GB/s)
288 additional rendering cores
AMD Radeon R9 255 OEM 's Advantages
Released 5 years and 6 months late
Boost Clock930MHz
Lower TDP (65W vs 150W)
Score
Benchmark
FP32 (float)
Radeon HD 4870
+26%
1.2 TFLOPS
Radeon R9 255 OEM
0.952 TFLOPS
Radeon HD 4870
VS
Radeon R9 255 OEM
Graphics Card
Jun 2008
Release Date
Dec 2013
Radeon R700
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
900 MHz
-
Boost Clock
930 MHz
900 MHz
Memory Clock
1150 MHz
Memory
512MB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
115.2GB/s
Bandwidth
73.60GB/s
Render Config
-
SM Count
-
10
Compute Units
8
800
Shading Units
512
40
TMUs
32
16
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
256 KB
Theoretical Performance
12.00 GPixel/s
Pixel Rate
14.88 GPixel/s
30.00 GTexel/s
Texture Rate
29.76 GTexel/s
-
FP16 (half)
-
1200 GFLOPS
FP32 (float)
952.3 GFLOPS
240.0 GFLOPS
FP64 (double)
59.52 GFLOPS
Graphics Processor
RV770
GPU Name
Cape Verde
RV770 XT (215-0669049)
GPU Variant
Cape Verde PRX
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.956 billion
Transistors
1.5 billion
256 mm²
Die Size
123 mm²
Board Design
150W
TDP
65W
450 W
Suggested PSU
250 W
2x DVI 1x S-Video
Outputs
No outputs
2x 6-pin
Power Connectors
1x 6-pin
Graphics Features
10.1 (10_1)
DirectX
12 (11_1)
3.3
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
-
CUDA
-
4.1
Shader Model
5.1
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