Home GPU Comparison AMD Radeon RX 560X vs AMD Radeon R9 255 OEM

AMD Radeon RX 560X vs AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 560X 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 RX 560X 's Advantages
Released 4 years and 4 months late
Boost Clock has increased by 37% (1275MHz vs 930MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (112.0GB/s vs 73.60GB/s)
512 additional rendering cores
AMD Radeon R9 255 OEM 's Advantages
Lower TDP (65W vs 75W)

Score

Benchmark

FP32 (float)
Radeon RX 560X +174%
2.611 TFLOPS
Radeon R9 255 OEM
0.952 TFLOPS
VS

Graphics Card

Apr 2018
Release Date
Dec 2013
Polaris
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 3.0 x8
Bus Interface
PCIe 3.0 x16

Clock Speeds

1175 MHz
Base Clock
900 MHz
1275 MHz
Boost Clock
930 MHz
1750 MHz
Memory Clock
1150 MHz

Memory

4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
128bit
Memory Bus
128bit
112.0GB/s
Bandwidth
73.60GB/s

Render Config

16
Compute Units
8
-
-
-
1024
Shading Units
512
64
TMUs
32
16
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

20.40 GPixel/s
Pixel Rate
14.88 GPixel/s
81.60 GTexel/s
Texture Rate
29.76 GTexel/s
2.611 TFLOPS
FP16 (half)
-
2.611 TFLOPS
FP32 (float)
952.3 GFLOPS
163.2 GFLOPS
FP64 (double)
59.52 GFLOPS

Board Design

75W
TDP
65W
250 W
Suggested PSU
250 W
1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a
Outputs
No outputs
None
Power Connectors
1x 6-pin

Graphics Processor

Polaris 21
GPU Name
Cape Verde
Polaris 21 XT (215-0908004)
GPU Variant
Cape Verde PRX
GCN 4.0
Architecture
GCN 1.0
GlobalFoundries
Foundry
TSMC
14 nm
Process Size
28 nm
3 billion
Transistors
1.5 billion
123 mm²
Die Size
123 mm²

Graphics Features

12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.2
Vulkan
1.2
-
-
-
6.4
Shader Model
5.1

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