ATI Radeon HD 2900 XTX vs AMD Radeon HD 6770 Green Edition

VS

ATI Radeon HD 2900 XTX

AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 2GB VRAM Radeon HD 6770 Green 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 21.34GB/s)

AMD Radeon HD 6770 Green Edition 's Advantages

More VRAM (2GB vs 512GB)

400 additional rendering cores

Lower TDP (86W vs 240W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon HD 6770 Green Edition +111%

1.008 TFLOPS

Radeon HD 2900 XTX

VS

Radeon HD 6770 Green Edition

Graphics Card

Unknown

Release Date

Apr 2013

Radeon R600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

828 MHz

Memory Clock

667 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR3

512bit

Memory Bus

128bit

106.0GB/s

Bandwidth

21.34GB/s

Render Config

4

Compute Units

9

-

320

Shading Units

720

16

TMUs

36

16

ROPs

16

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

11.20 GPixel/s

11.89 GTexel/s

Texture Rate

25.20 GTexel/s

-

475.5 GFLOPS

FP32 (float)

1008 GFLOPS

-

Board Design

240W

TDP

86W

550 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

-

Graphics Processor

R600

GPU Name

Juniper

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Juniper LE (215-0754009)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

80 nm

Process Size

40 nm

0.72 billion

Transistors

1.04 billion

420 mm²

Die Size

166 mm²

Graphics Features

10.0 (10_0)

DirectX

11.2 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

4.0

Shader Model

5.0

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