ATI Radeon HD 2900 XT vs AMD Radeon R9 280

VS

ATI Radeon HD 2900 XT

AMD Radeon R9 280

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XT and 3GB VRAM Radeon R9 280 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280 's Advantages

Released 6 years and 10 months late

Boost Clock933MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (240.0GB/s vs 106.0GB/s)

1472 additional rendering cores

Lower TDP (200W vs 215W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XT

0.476 TFLOPS

Radeon R9 280 +602%

3.344 TFLOPS

Radeon HD 2900 XT

VS

Radeon R9 280

Graphics Card

May 2007

Release Date

Mar 2014

Radeon R600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

827 MHz

-

Boost Clock

933 MHz

828 MHz

Memory Clock

1250 MHz

Memory

512MB

Memory Size

3GB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

384bit

106.0GB/s

Bandwidth

240.0GB/s

Render Config

4

Compute Units

28

-

320

Shading Units

1792

16

TMUs

112

16

ROPs

32

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

29.86 GPixel/s

11.89 GTexel/s

Texture Rate

104.5 GTexel/s

-

475.5 GFLOPS

FP32 (float)

3.344 TFLOPS

-

FP64 (double)

836.0 GFLOPS

Board Design

215W

TDP

200W

550 W

Suggested PSU

550 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

R600

GPU Name

Tahiti

R600 XT (215RGMDKA13FG)

GPU Variant

Tahiti PRO3 (215-0821330)

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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