AMD Radeon HD 7770 GHz Edition vs ATI Radeon HD 4250

VS

AMD Radeon HD 7770 GHz Edition

ATI Radeon HD 4250

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 GHz Edition and 512MB VRAM Radeon HD 4250 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

Released 3 years late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (72.00GB/s vs 6.336GB/s)

600 additional rendering cores

ATI Radeon HD 4250 's Advantages

Lower TDP (25W vs 80W)

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition +2566%

1.28 TFLOPS

Radeon HD 4250

0.048 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon HD 4250

Graphics Card

Feb 2012

Release Date

Feb 2009

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1125 MHz

Memory Clock

396 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

128bit

Memory Bus

64bit

72.00GB/s

Bandwidth

6.336GB/s

Render Config

10

Compute Units

2

-

640

Shading Units

40

TMUs

4

16

ROPs

4

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

64 KB

-

Theoretical Performance

16.00 GPixel/s

Pixel Rate

2.376 GPixel/s

40.00 GTexel/s

Texture Rate

2.376 GTexel/s

-

1280 GFLOPS

FP32 (float)

47.52 GFLOPS

80.00 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

25W

250 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

1x 6-pin

Power Connectors

None

Graphics Processor

Cape Verde

GPU Name

RV620

Cape Verde XT

GPU Variant

RV620 LE

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

1.5 billion

Transistors

0.181 billion

123 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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