AMD Radeon R9 255 OEM vs AMD Radeon HD 6970

VS

AMD Radeon R9 255 OEM AMD Radeon HD 6970

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 255 OEM and 2GB VRAM Radeon HD 6970 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 3 years late

Boost Clock930MHz

Lower TDP (65W vs 250W)

AMD Radeon HD 6970 's Advantages

Larger VRAM bandwidth (176.0GB/s vs 73.60GB/s)

1024 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 255 OEM

0.952 TFLOPS

Radeon HD 6970 +183%

2.703 TFLOPS

Radeon R9 255 OEM

VS

Radeon HD 6970

Graphics Card

Dec 2013

Release Date

Dec 2010

Volcanic Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

900 MHz

Base Clock

-

930 MHz

Boost Clock

-

1150 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

73.60GB/s

Bandwidth

176.0GB/s

Render Config

-

SM Count

-

8

Compute Units

24

512

Shading Units

1536

32

TMUs

96

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

14.88 GPixel/s

Pixel Rate

28.16 GPixel/s

29.76 GTexel/s

Texture Rate

84.48 GTexel/s

-

FP16 (half)

-

952.3 GFLOPS

FP32 (float)

2.703 TFLOPS

59.52 GFLOPS

FP64 (double)

675.8 GFLOPS

Graphics Processor

Cape Verde

GPU Name

Cayman

Cape Verde PRX

GPU Variant

Cayman XT (215-0807007)

GCN 1.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

2.64 billion

123 mm²

Die Size

389 mm²

Board Design

65W

TDP

250W

250 W

Suggested PSU

600 W

No outputs

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

5.1

Shader Model

5.0

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