Radeon R9 295X2 vs Radeon R9 255 OEM
We compared two Desktop platform GPUs: 4GB VRAM Radeon R9 295X2 and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 295X2 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (320.0GB/s vs 73.60GB/s)
2304 additional rendering cores
Radeon R9 255 OEM 's Advantages
Boost Clock930MHz
Lower TDP (65W vs 500W)
Score
Benchmark
FP32 (float)
Radeon R9 295X2
+502%
5733
Radeon R9 255 OEM
952
Graphics Card
Apr 2014
Release Date
Dec 2013
Volcanic 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
1250 MHz
Memory Clock
1150 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
512bit
Memory Bus
128bit
320.0GB/s
Bandwidth
73.60GB/s
Render Config
44
Compute Units
8
2816
Shading Units
512
176
TMUs
32
64
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
Theoretical Performance
65.15 GPixel/s
Pixel Rate
14.88 GPixel/s
179.2 GTexel/s
Texture Rate
29.76 GTexel/s
5.733 TFLOPS
FP32 (float)
952.3 GFLOPS
716.7 GFLOPS
FP64 (double)
59.52 GFLOPS
Board Design
500W
TDP
65W
900 W
Suggested PSU
250 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
No outputs
2x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Vesuvius
GPU Name
Cape Verde
Vesuvius XT
(215-0852022)
GPU Variant
Cape Verde PRX
GCN 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
6.2 billion
Transistors
1.5 billion
438 mm²
Die Size
123 mm²
Graphics Features
12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.0
OpenCL
1.2
1.2
Vulkan
1.2
6.3
Shader Model
5.1
