AMD Radeon HD 6990 vs ATI Radeon HD 2600 XT X2

VS

AMD Radeon HD 6990

ATI Radeon HD 2600 XT X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 512MB VRAM Radeon HD 2600 XT X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

Released 3 years and 8 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 25.60GB/s)

1416 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6990 +1228%

2.55 TFLOPS

Radeon HD 2600 XT X2

0.192 TFLOPS

Radeon HD 6990

VS

Radeon HD 2600 XT X2

Graphics Card

Mar 2011

Release Date

Jul 2007

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

160.0GB/s

Bandwidth

25.60GB/s

Render Config

24

Compute Units

3

-

1536

Shading Units

120

96

TMUs

8

32

ROPs

4

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

64 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

3.200 GPixel/s

79.68 GTexel/s

Texture Rate

6.400 GTexel/s

-

2.550 TFLOPS

FP32 (float)

192.0 GFLOPS

637.4 GFLOPS

FP64 (double)

-

Board Design

375W

TDP

Unknown

750 W

Suggested PSU

200 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

4x DVI 1x S-Video

2x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Antilles

GPU Name

RV630

Antilles XT (215-0807027)

GPU Variant

-

TeraScale 3

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

65 nm

2.64 billion

Transistors

0.39 billion

389 mm²

Die Size

153 mm²

Graphics Features

11.2 (11_0)

DirectX

10.0 (10_0)

4.4

OpenGL

3.3

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.0

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