AMD Radeon HD 7970 X2 vs ATI Radeon HD 2900 GT

VS

AMD Radeon HD 7970 X2

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 256MB VRAM Radeon HD 2900 GT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 X2 's Advantages

Released 4 years and 9 months late

More VRAM (3GB vs 256GB)

Larger VRAM bandwidth (264.0GB/s vs 51.20GB/s)

1808 additional rendering cores

ATI Radeon HD 2900 GT 's Advantages

Lower TDP (150W vs 500W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 X2 +1215%

3.789 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon HD 7970 X2

VS

Radeon HD 2900 GT

Graphics Card

Aug 2012

Release Date

Nov 2007

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

51.20GB/s

Render Config

32

Compute Units

3

-

2048

Shading Units

240

128

TMUs

12

32

ROPs

12

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

128 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

7.212 GPixel/s

118.4 GTexel/s

Texture Rate

7.212 GTexel/s

-

3.789 TFLOPS

FP32 (float)

288.5 GFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

500W

TDP

150W

900 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

3x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

New Zealand

GPU Name

R600

-

GPU Variant

R600 GT (215RGFDKA13FG)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

80 nm

4.313 billion

Transistors

0.72 billion

352 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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