AMD Radeon R9 285 vs ATI Radeon HD 2900 XTX

VS

AMD Radeon R9 285 ATI Radeon HD 2900 XTX

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 and 512MB VRAM Radeon HD 2900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285 's Advantages

Larger VRAM bandwidth (176.0GB/s vs 106.0GB/s)

1472 additional rendering cores

Lower TDP (190W vs 240W)

Score

Benchmark

FP32 (float)

Radeon R9 285 +591%

3.29 TFLOPS

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon R9 285

VS

Radeon HD 2900 XTX

Graphics Card

Sep 2014

Release Date

Unknown

Volcanic Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1375 MHz

Memory Clock

828 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

512bit

176.0GB/s

Bandwidth

106.0GB/s

Render Config

-

SM Count

-

28

Compute Units

4

1792

Shading Units

320

112

TMUs

16

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

Theoretical Performance

29.38 GPixel/s

Pixel Rate

11.89 GPixel/s

102.8 GTexel/s

Texture Rate

11.89 GTexel/s

3.290 TFLOPS

FP16 (half)

-

3.290 TFLOPS

FP32 (float)

475.5 GFLOPS

205.6 GFLOPS

FP64 (double)

-

Graphics Processor

Tonga

GPU Name

R600

Tonga PRO (215-0851128)

GPU Variant

R600 XTX A11 (215RGMDKA11FG)

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

Board Design

190W

TDP

240W

450 W

Suggested PSU

550 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

2x 6-pin

Graphics Features

12 (12_0)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.1

OpenCL

N/A

1.2.170

Vulkan

N/A

-

CUDA

-

6.5

Shader Model

4.0

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