AMD Radeon R9 255 OEM vs AMD Radeon HD 7950

VS

AMD Radeon R9 255 OEM

AMD Radeon HD 7950

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 255 OEM and 3GB VRAM Radeon HD 7950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 255 OEM 's Advantages

Released 1 years and 11 months late

Boost Clock930MHz

Lower TDP (65W vs 200W)

AMD Radeon HD 7950 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 73.60GB/s)

1280 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 255 OEM

0.952 TFLOPS

Radeon HD 7950 +201%

2.867 TFLOPS

Radeon R9 255 OEM

VS

Radeon HD 7950

Graphics Card

Dec 2013

Release Date

Jan 2012

Volcanic Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

900 MHz

Base Clock

-

930 MHz

Boost Clock

-

1150 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

73.60GB/s

Bandwidth

240.0GB/s

Render Config

8

Compute Units

28

-

512

Shading Units

1792

32

TMUs

112

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

14.88 GPixel/s

Pixel Rate

25.60 GPixel/s

29.76 GTexel/s

Texture Rate

89.60 GTexel/s

-

952.3 GFLOPS

FP32 (float)

2.867 TFLOPS

59.52 GFLOPS

FP64 (double)

716.8 GFLOPS

Board Design

65W

TDP

200W

250 W

Suggested PSU

550 W

No outputs

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Cape Verde

GPU Name

Tahiti

Cape Verde PRX

GPU Variant

Tahiti PRO (215-0821056)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

4.313 billion

123 mm²

Die Size

352 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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