Radeon R9 290 vs Radeon R9 255 OEM
We compared two Desktop platform GPUs: 4GB VRAM Radeon R9 290 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 290 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (320.0GB/s vs 73.60GB/s)
2048 additional rendering cores
Radeon R9 255 OEM 's Advantages
Boost Clock930MHz
Lower TDP (65W vs 275W)
Score
Benchmark
FP32 (float)
Radeon R9 290
+409%
4849
Radeon R9 255 OEM
952
Graphics Card
Nov 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
-
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
40
Compute Units
8
2560
Shading Units
512
160
TMUs
32
64
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
Theoretical Performance
60.61 GPixel/s
Pixel Rate
14.88 GPixel/s
151.5 GTexel/s
Texture Rate
29.76 GTexel/s
4.849 TFLOPS
FP32 (float)
952.3 GFLOPS
606.1 GFLOPS
FP64 (double)
59.52 GFLOPS
Board Design
275W
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
Hawaii
GPU Name
Cape Verde
Hawaii PRO
(215-0852020)
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
