ATI Radeon HD 2600 XT Mac Edition vs NVIDIA GeForce GTX 660

VS

ATI Radeon HD 2600 XT Mac Edition

NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 256MB VRAM Radeon HD 2600 XT Mac Edition and 2GB VRAM GeForce GTX 660 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 140W)

NVIDIA GeForce GTX 660 's Advantages

Released 4 years and 7 months late

Boost Clock1032MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (144.2GB/s vs 25.60GB/s)

840 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 2600 XT Mac Edition

0.168 TFLOPS

GeForce GTX 660 +1079%

1.981 TFLOPS

Radeon HD 2600 XT Mac Edition

VS

GeForce GTX 660

Graphics Card

Feb 2008

Release Date

Sep 2012

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

800 MHz

Memory Clock

1502 MHz

Memory

256MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

192bit

25.60GB/s

Bandwidth

144.2GB/s

Render Config

3

Compute Units

-

120

Shading Units

960

8

TMUs

80

4

ROPs

24

-

L1 Cache

16 KB (per SMX)

64 KB

L2 Cache

384 KB

-

Theoretical Performance

2.800 GPixel/s

Pixel Rate

20.64 GPixel/s

5.600 GTexel/s

Texture Rate

82.56 GTexel/s

-

168.0 GFLOPS

FP32 (float)

1.981 TFLOPS

-

FP64 (double)

82.56 GFLOPS

Board Design

45W

TDP

140W

200 W

Suggested PSU

300 W

2x DVI

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Processor

RV630

GPU Name

GK106

-

GPU Variant

GK106-400-A1

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

65 nm

Process Size

28 nm

0.39 billion

Transistors

2.54 billion

153 mm²

Die Size

221 mm²

Graphics Features

10.0 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.0

Shader Model

5.1

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