NVIDIA GeForce GT 640 OEM Rebrand vs ATI Radeon X800 GTO AGP

VS

NVIDIA GeForce GT 640 OEM Rebrand

ATI Radeon X800 GTO AGP

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand 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 GT 640 OEM Rebrand 's Advantages

Released 4 years and 5 months late

More VRAM (1536GB vs 256GB)

Larger VRAM bandwidth (38.40GB/s vs 31.36GB/s)

144 additional rendering cores

ATI Radeon X800 GTO AGP 's Advantages

Lower TDP (49W vs 75W)

Score

GeForce GT 640 OEM Rebrand

VS

Radeon X800 GTO AGP

Graphics Card

Apr 2012

Release Date

Nov 2007

GeForce 600

Generation

Radeon R400 AGP

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

AGP 8x

Clock Speeds

-

800 MHz

Memory Clock

490 MHz

Memory

1536MB

Memory Size

256MB

DDR3

Memory Type

GDDR3

192bit

Memory Bus

256bit

38.40GB/s

Bandwidth

31.36GB/s

Render Config

-

3

SM Count

-

144

Shading Units

-

24

TMUs

12

24

ROPs

12

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

4.800 GPixel/s

17.28 GTexel/s

Texture Rate

4.800 GTexel/s

-

414.7 GFLOPS

FP32 (float)

-

34.56 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

49W

250 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x VGA 1x S-Video

None

Power Connectors

1x Molex

Graphics Processor

GF116

GPU Name

R420

GF116-150-A1

GPU Variant

R420 GTO

Fermi 2.0

Architecture

R400

TSMC

Foundry

TSMC

40 nm

Process Size

130 nm

1.17 billion

Transistors

0.16 billion

238 mm²

Die Size

281 mm²

Graphics Features

12 (11_0)

DirectX

9.0b (9_2)

4.6

OpenGL

2.1

1.1

OpenCL

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

-

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