ATI Radeon HD 2900 XT vs ATI Radeon HD 3650

VS

ATI Radeon HD 2900 XT

ATI Radeon HD 3650

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XT and 256MB VRAM Radeon HD 3650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XT 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (106.0GB/s vs 25.60GB/s)

200 additional rendering cores

ATI Radeon HD 3650 's Advantages

Released 8 months late

Lower TDP (65W vs 215W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XT +173%

0.476 TFLOPS

Radeon HD 3650

0.174 TFLOPS

Radeon HD 2900 XT

VS

Radeon HD 3650

Graphics Card

May 2007

Release Date

Jan 2008

Radeon R600

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

828 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

256MB

GDDR3

Memory Type

GDDR3

512bit

Memory Bus

128bit

106.0GB/s

Bandwidth

25.60GB/s

Render Config

4

Compute Units

3

-

320

Shading Units

120

16

TMUs

8

16

ROPs

4

-

256 KB

L2 Cache

128 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

2.900 GPixel/s

11.89 GTexel/s

Texture Rate

5.800 GTexel/s

-

475.5 GFLOPS

FP32 (float)

174.0 GFLOPS

-

Board Design

215W

TDP

65W

550 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

R600

GPU Name

RV635

R600 XT (215RGMDKA13FG)

GPU Variant

RV635 PRO (215-0682008)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

80 nm

Process Size

55 nm

0.72 billion

Transistors

0.378 billion

420 mm²

Die Size

135 mm²

Graphics Features

10.0 (10_0)

DirectX

10.1 (10_1)

3.3 (full) 4.0 (partial)

OpenGL

3.3

N/A

OpenCL

N/A

Vulkan

N/A

-

4.0

Shader Model

4.1

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