ATI Radeon HD 2600 XT Mac Edition vs NVIDIA GeForce GT 645 OEM

VS

ATI Radeon HD 2600 XT Mac Edition

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 256MB VRAM Radeon HD 2600 XT Mac Edition and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2600 XT Mac Edition 's Advantages

Lower TDP (45W vs 102W)

NVIDIA GeForce GT 645 OEM 's Advantages

Released 4 years and 2 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (91.87GB/s vs 25.60GB/s)

168 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 2600 XT Mac Edition

0.168 TFLOPS

GeForce GT 645 OEM +432%

0.894 TFLOPS

Radeon HD 2600 XT Mac Edition

VS

GeForce GT 645 OEM

Graphics Card

Feb 2008

Release Date

Apr 2012

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

957 MHz

Memory

256MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

192bit

25.60GB/s

Bandwidth

91.87GB/s

Render Config

3

Compute Units

-

SM Count

6

120

Shading Units

288

8

TMUs

48

4

ROPs

24

-

L1 Cache

64 KB (per SM)

64 KB

L2 Cache

384 KB

-

Theoretical Performance

2.800 GPixel/s

Pixel Rate

9.312 GPixel/s

5.600 GTexel/s

Texture Rate

37.25 GTexel/s

-

168.0 GFLOPS

FP32 (float)

894.0 GFLOPS

-

FP64 (double)

74.50 GFLOPS

Board Design

45W

TDP

102W

200 W

Suggested PSU

300 W

2x DVI

Outputs

2x DVI 1x mini-HDMI 1.3a

None

Power Connectors

-

Graphics Processor

RV630

GPU Name

GF114

-

TeraScale

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

65 nm

Process Size

40 nm

0.39 billion

Transistors

1.95 billion

153 mm²

Die Size

332 mm²

Graphics Features

10.0 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

4.0

Shader Model

5.1

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