AMD Radeon HD 7770 GHz Edition vs ATI Radeon HD 2900 PRO

VS

AMD Radeon HD 7770 GHz Edition

ATI Radeon HD 2900 PRO

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 GHz Edition and 512MB VRAM Radeon HD 2900 PRO 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 4 years and 2 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (72.00GB/s vs 51.20GB/s)

320 additional rendering cores

Lower TDP (80W vs 200W)

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition +233%

1.28 TFLOPS

Radeon HD 2900 PRO

0.384 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon HD 2900 PRO

Graphics Card

Feb 2012

Release Date

Dec 2007

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1125 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

256bit

72.00GB/s

Bandwidth

51.20GB/s

Render Config

10

Compute Units

4

-

640

Shading Units

320

40

TMUs

16

ROPs

16

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

128 KB

-

Theoretical Performance

16.00 GPixel/s

Pixel Rate

9.600 GPixel/s

40.00 GTexel/s

Texture Rate

9.600 GTexel/s

-

1280 GFLOPS

FP32 (float)

384.0 GFLOPS

80.00 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

200W

250 W

Suggested PSU

550 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Cape Verde

GPU Name

R600

Cape Verde XT

GPU Variant

R600 PRO (215RGMDKA13FG)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

80 nm

1.5 billion

Transistors

0.72 billion

123 mm²

Die Size

420 mm²

Graphics Features

12 (11_1)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.0

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