NVIDIA GeForce GT 645 OEM vs NVIDIA GeForce 6800

VS

NVIDIA GeForce GT 645 OEM

NVIDIA GeForce 6800

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 256MB VRAM GeForce 6800 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Released 7 years and 5 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (91.87GB/s vs 19.20GB/s)

288 additional rendering cores

Score

GeForce GT 645 OEM

VS

GeForce 6800

Graphics Card

Apr 2012

Release Date

Nov 2004

GeForce 600

Generation

GeForce 6 PCIe

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

957 MHz

Memory Clock

300 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

DDR

192bit

Memory Bus

256bit

91.87GB/s

Bandwidth

19.20GB/s

Render Config

-

6

SM Count

-

288

Shading Units

-

48

TMUs

12

24

ROPs

8

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

2.600 GPixel/s

37.25 GTexel/s

Texture Rate

3.900 GTexel/s

-

894.0 GFLOPS

FP32 (float)

-

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

Unknown

300 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x VGA 1x S-Video

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

NV41

-

Fermi 2.0

Architecture

Curie

TSMC

Foundry

TSMC

40 nm

Process Size

130 nm

1.95 billion

Transistors

0.19 billion

332 mm²

Die Size

225 mm²

Graphics Features

12 (11_0)

DirectX

9.0c (9_3)

4.6

OpenGL

2.0 (full) 2.1 (partial)

1.1

OpenCL

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

3.0

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