AMD Radeon HD 7770 GHz Edition vs AMD Radeon R9 255 OEM

VS

AMD Radeon HD 7770 GHz Edition AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 GHz Edition 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 HD 7770 GHz Edition 's Advantages

128 additional rendering cores

AMD Radeon R9 255 OEM 's Advantages

Released 1 years and 10 months late

Boost Clock930MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (73.60GB/s vs 72.00GB/s)

Lower TDP (65W vs 80W)

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition +34%

1.28 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon R9 255 OEM

Graphics Card

Feb 2012

Release Date

Dec 2013

Southern 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

1125 MHz

Memory Clock

1150 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

72.00GB/s

Bandwidth

73.60GB/s

Render Config

-

SM Count

-

10

Compute Units

8

640

Shading Units

512

40

TMUs

32

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

16.00 GPixel/s

Pixel Rate

14.88 GPixel/s

40.00 GTexel/s

Texture Rate

29.76 GTexel/s

-

FP16 (half)

-

1280 GFLOPS

FP32 (float)

952.3 GFLOPS

80.00 GFLOPS

FP64 (double)

59.52 GFLOPS

Graphics Processor

Cape Verde

GPU Name

Cape Verde

Cape Verde XT

GPU Variant

Cape Verde PRX

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

1.5 billion

123 mm²

Die Size

123 mm²

Board Design

80W

TDP

65W

250 W

Suggested PSU

250 W

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

Outputs

No outputs

1x 6-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

5.1

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