ATI Radeon HD 2900 XTX vs AMD Radeon HD 7970

VS

ATI Radeon HD 2900 XTX

AMD Radeon HD 7970

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 3GB VRAM Radeon HD 7970 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages

Lower TDP (240W vs 250W)

AMD Radeon HD 7970 's Advantages

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 106.0GB/s)

1728 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon HD 7970 +696%

3.789 TFLOPS

Radeon HD 2900 XTX

VS

Radeon HD 7970

Graphics Card

Unknown

Release Date

Dec 2011

Radeon R600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

828 MHz

Memory Clock

1375 MHz

Memory

512MB

Memory Size

3GB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

384bit

106.0GB/s

Bandwidth

264.0GB/s

Render Config

4

Compute Units

32

-

320

Shading Units

2048

16

TMUs

128

16

ROPs

32

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

29.60 GPixel/s

11.89 GTexel/s

Texture Rate

118.4 GTexel/s

-

475.5 GFLOPS

FP32 (float)

3.789 TFLOPS

-

FP64 (double)

947.2 GFLOPS

Board Design

240W

TDP

250W

550 W

Suggested PSU

600 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 + 1x 8-pin

Graphics Processor

R600

GPU Name

Tahiti

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Tahiti XT (215-0821060)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

80 nm

Process Size

28 nm

0.72 billion

Transistors

4.313 billion

420 mm²

Die Size

352 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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