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

VS

ATI Radeon HD 2900 XTX

AMD Radeon HD 7770 GHz Edition

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 1024MB VRAM Radeon HD 7770 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages

Larger VRAM bandwidth (106.0GB/s vs 72.00GB/s)

AMD Radeon HD 7770 GHz Edition 's Advantages

More VRAM (1024GB vs 512GB)

320 additional rendering cores

Lower TDP (80W vs 240W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon HD 7770 GHz Edition +168%

1.28 TFLOPS

Radeon HD 2900 XTX

VS

Radeon HD 7770 GHz Edition

Graphics Card

Unknown

Release Date

Feb 2012

Radeon R600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

828 MHz

Memory Clock

1125 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

128bit

106.0GB/s

Bandwidth

72.00GB/s

Render Config

4

Compute Units

10

-

320

Shading Units

640

16

TMUs

40

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

16.00 GPixel/s

11.89 GTexel/s

Texture Rate

40.00 GTexel/s

-

475.5 GFLOPS

FP32 (float)

1280 GFLOPS

-

FP64 (double)

80.00 GFLOPS

Board Design

240W

TDP

80W

550 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

R600

GPU Name

Cape Verde

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Cape Verde XT

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

80 nm

Process Size

28 nm

0.72 billion

Transistors

1.5 billion

420 mm²

Die Size

123 mm²

Graphics Features

10.0 (10_0)

DirectX

12 (11_1)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

1.2

N/A

Vulkan

1.2

-

4.0

Shader Model

5.1

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