NVIDIA GeForce GTX 660 vs ATI Radeon X800 GTO AGP

VS

NVIDIA GeForce GTX 660

ATI Radeon X800 GTO AGP

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 256MB VRAM Radeon X800 GTO AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages

Released 4 years and 10 months late

Boost Clock1032MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (144.2GB/s vs 31.36GB/s)

960 additional rendering cores

ATI Radeon X800 GTO AGP 's Advantages

Lower TDP (49W vs 140W)

Score

GeForce GTX 660

VS

Radeon X800 GTO AGP

Graphics Card

Sep 2012

Release Date

Nov 2007

GeForce 600

Generation

Radeon R400 AGP

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

AGP 8x

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

490 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

31.36GB/s

Render Config

-

960

Shading Units

-

80

TMUs

12

24

ROPs

12

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

4.800 GPixel/s

82.56 GTexel/s

Texture Rate

4.800 GTexel/s

-

1.981 TFLOPS

FP32 (float)

-

82.56 GFLOPS

FP64 (double)

-

Board Design

140W

TDP

49W

300 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

1x 6-pin

Power Connectors

1x Molex

Graphics Processor

GK106

GPU Name

R420

GK106-400-A1

GPU Variant

R420 GTO

Kepler

Architecture

R400

TSMC

Foundry

TSMC

28 nm

Process Size

130 nm

2.54 billion

Transistors

0.16 billion

221 mm²

Die Size

281 mm²

Graphics Features

12 (11_0)

DirectX

9.0b (9_2)

4.6

OpenGL

2.1

3.0

OpenCL

N/A

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

-

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