NVIDIA GeForce GT 640 vs NVIDIA GeForce 6800 XT

VS

NVIDIA GeForce GT 640

NVIDIA GeForce 6800 XT

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 256MB VRAM GeForce 6800 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 6 years and 9 months late

More VRAM (2GB vs 256GB)

384 additional rendering cores

NVIDIA GeForce 6800 XT 's Advantages

Larger VRAM bandwidth (38.40GB/s vs 28.51GB/s)

Score

GeForce GT 640

VS

GeForce 6800 XT

Graphics Card

Jun 2012

Release Date

Sep 2005

GeForce 600

Generation

GeForce 6 AGP

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

AGP 8x

Clock Speeds

-

891 MHz

Memory Clock

600 MHz

Memory

2GB

Memory Size

256MB

DDR3

Memory Type

GDDR3

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

38.40GB/s

Render Config

-

384

Shading Units

-

32

TMUs

12

16

ROPs

8

-

16 KB (per SMX)

L1 Cache

-

256 KB

L2 Cache

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

3.600 GPixel/s

28.86 GTexel/s

Texture Rate

5.400 GTexel/s

-

692.7 GFLOPS

FP32 (float)

-

28.86 GFLOPS

FP64 (double)

-

Board Design

65W

TDP

Unknown

250 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

None

Power Connectors

1x Molex

Graphics Processor

GK107

GPU Name

NV42

GK107-300-A2

GPU Variant

6800 XT

Kepler

Architecture

Curie

TSMC

Foundry

TSMC

28 nm

Process Size

110 nm

1.27 billion

Transistors

0.202 billion

118 mm²

Die Size

222 mm²

Graphics Features

12 (11_0)

DirectX

9.0c (9_3)

4.6

OpenGL

2.0 (full) 2.1 (partial)

3.0

OpenCL

N/A

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

3.0

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