AMD Radeon HD 6770 vs ATI Radeon HD 2900 XT

VS

AMD Radeon HD 6770

ATI Radeon HD 2900 XT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6770 and 512MB VRAM Radeon HD 2900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770 's Advantages

Released 3 years and 8 months late

More VRAM (1024GB vs 512GB)

480 additional rendering cores

Lower TDP (108W vs 215W)

ATI Radeon HD 2900 XT 's Advantages

Larger VRAM bandwidth (106.0GB/s vs 76.80GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 6770 +185%

1.36 TFLOPS

Radeon HD 2900 XT

0.476 TFLOPS

Radeon HD 6770

VS

Radeon HD 2900 XT

Graphics Card

Jan 2011

Release Date

May 2007

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

828 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

512bit

76.80GB/s

Bandwidth

106.0GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

16

-

8 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

256 KB

-

Theoretical Performance

13.60 GPixel/s

Pixel Rate

11.89 GPixel/s

34.00 GTexel/s

Texture Rate

11.89 GTexel/s

-

1360 GFLOPS

FP32 (float)

475.5 GFLOPS

-

Board Design

108W

TDP

215W

300 W

Suggested PSU

550 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Juniper

GPU Name

R600

Juniper XT (215-0754013)

GPU Variant

R600 XT (215RGMDKA13FG)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

80 nm

1.04 billion

Transistors

0.72 billion

166 mm²

Die Size

420 mm²

Graphics Features

11.2 (11_0)

DirectX

10.0 (10_0)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.0

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