AMD Radeon Sky 700 vs AMD Radeon R9 255 OEM

VS

AMD Radeon Sky 700

AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 6GB VRAM Radeon Sky 700 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 Sky 700 's Advantages

More VRAM (6GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 73.60GB/s)

1280 additional rendering cores

AMD Radeon R9 255 OEM 's Advantages

Released 9 months late

Boost Clock930MHz

Lower TDP (65W vs 225W)

Score

Benchmark

FP32 (float)

Radeon Sky 700 +238%

3.226 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon Sky 700

VS

Radeon R9 255 OEM

Graphics Card

Mar 2013

Release Date

Dec 2013

Radeon Sky

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

1375 MHz

Memory Clock

1150 MHz

Memory

6GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

264.0GB/s

Bandwidth

73.60GB/s

Render Config

28

Compute Units

8

-

1792

Shading Units

512

112

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

14.88 GPixel/s

100.8 GTexel/s

Texture Rate

29.76 GTexel/s

-

3.226 TFLOPS

FP32 (float)

952.3 GFLOPS

806.4 GFLOPS

FP64 (double)

59.52 GFLOPS

Board Design

225W

TDP

65W

550 W

Suggested PSU

250 W

1x DisplayPort 1.2

Outputs

No outputs

1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

Cape Verde

Tahiti PRO GL

GPU Variant

Cape Verde PRX

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

1.5 billion

352 mm²

Die Size

123 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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