NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce 6800 XT

VS

NVIDIA GeForce GT 640 Rev. 2 NVIDIA GeForce 6800 XT

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 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 Rev. 2 's Advantages

Released 7 years and 8 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (40.06GB/s vs 38.40GB/s)

384 additional rendering cores

Score

GeForce GT 640 Rev. 2

VS

GeForce 6800 XT

Graphics Card

May 2013

Release Date

Sep 2005

GeForce 600

Generation

GeForce 6 AGP

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

AGP 8x

Clock Speeds

-

Base Clock

-

Boost Clock

-

1252 MHz

Memory Clock

600 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

64bit

Memory Bus

256bit

40.06GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

-

Compute Units

-

384

Shading Units

-

32

TMUs

12

8

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

-

512 KB

L2 Cache

-

Theoretical Performance

8.368 GPixel/s

Pixel Rate

3.600 GPixel/s

33.47 GTexel/s

Texture Rate

5.400 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

-

33.47 GFLOPS

FP64 (double)

-

Graphics Processor

GK208

GPU Name

NV42

GK208-400-A1

GPU Variant

6800 XT

Kepler 2.0

Architecture

Curie

TSMC

Foundry

TSMC

28 nm

Process Size

110 nm

1.02 billion

Transistors

0.202 billion

87 mm²

Die Size

222 mm²

Board Design

49W

TDP

Unknown

200 W

Suggested PSU

200 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

1x DVI 1x VGA 1x S-Video

None

Power Connectors

1x Molex

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

3.5

CUDA

-

5.1

Shader Model

3.0

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