AMD Radeon R9 285X vs ATI Radeon HD 2900 XT

VS

AMD Radeon R9 285X

ATI Radeon HD 2900 XT

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X 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 R9 285X 's Advantages

More VRAM (3GB vs 512GB)

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

1728 additional rendering cores

Lower TDP (200W vs 215W)

Score

Benchmark

FP32 (float)

Radeon R9 285X +762%

4.104 TFLOPS

Radeon HD 2900 XT

0.476 TFLOPS

Radeon R9 285X

VS

Radeon HD 2900 XT

Graphics Card

Unknown

Release Date

May 2007

Volcanic Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

828 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

512bit

264.0GB/s

Bandwidth

106.0GB/s

Render Config

32

Compute Units

4

-

2048

Shading Units

320

128

TMUs

16

32

ROPs

16

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

256 KB

-

Theoretical Performance

32.06 GPixel/s

Pixel Rate

11.89 GPixel/s

128.3 GTexel/s

Texture Rate

11.89 GTexel/s

-

4.104 TFLOPS

FP32 (float)

475.5 GFLOPS

-

Board Design

200W

TDP

215W

550 W

Suggested PSU

550 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Tonga

GPU Name

R600

Tonga XT (215-0851313)

GPU Variant

R600 XT (215RGMDKA13FG)

GCN 3.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

80 nm

5 billion

Transistors

0.72 billion

366 mm²

Die Size

420 mm²

Graphics Features

12 (12_0)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.0

OpenCL

N/A

1.2

Vulkan

N/A

-

6.3

Shader Model

4.0

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