Home GPU Comparison AMD Radeon R9 280X vs AMD Radeon R9 255 OEM

AMD Radeon R9 280X vs AMD Radeon R9 255 OEM

AMD Radeon R9 280X
VS
AMD Radeon R9 255 OEM
AMD Radeon R9 280X
AMD Radeon R9 255 OEM
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X 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 R9 280X 's Advantages
Boost Clock has increased by 8% (1000MHz vs 930MHz)
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 73.60GB/s)
1536 additional rendering cores
AMD Radeon R9 255 OEM 's Advantages
Lower TDP (65W vs 250W)

Score

Benchmark

FP32 (float)
Radeon R9 280X +330%
4.096 TFLOPS
Radeon R9 255 OEM
0.952 TFLOPS
Radeon R9 280X
VS
Radeon R9 255 OEM

Graphics Card

Oct 2013
Release Date
Dec 2013
Volcanic Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

850 MHz
Base Clock
900 MHz
1000 MHz
Boost Clock
930 MHz
1500 MHz
Memory Clock
1150 MHz

Memory

3GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
128bit
288.0GB/s
Bandwidth
73.60GB/s

Render Config

32
Compute Units
8
-
-
-
2048
Shading Units
512
128
TMUs
32
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

32.00 GPixel/s
Pixel Rate
14.88 GPixel/s
128.0 GTexel/s
Texture Rate
29.76 GTexel/s
-
-
-
4.096 TFLOPS
FP32 (float)
952.3 GFLOPS
1024 GFLOPS
FP64 (double)
59.52 GFLOPS

Board Design

250W
TDP
65W
600 W
Suggested PSU
250 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin

Graphics Processor

Tahiti
GPU Name
Cape Verde
Tahiti XTL (215-0821065)
GPU Variant
Cape Verde PRX
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
1.5 billion
352 mm²
Die Size
123 mm²

Graphics Features

12 (11_1)
DirectX
12 (11_1)
4.6
OpenGL
4.6
1.2
OpenCL
1.2
1.2
Vulkan
1.2
-
-
-
5.1
Shader Model
5.1

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