NVIDIA GeForce GT 645 OEM vs NVIDIA GeForce 8800 GT Mac Edition

VS

NVIDIA GeForce GT 645 OEM

NVIDIA GeForce 8800 GT Mac Edition

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 512MB VRAM GeForce 8800 GT Mac Edition 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 4 years and 2 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (91.87GB/s vs 57.60GB/s)

176 additional rendering cores

Lower TDP (102W vs 125W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +166%

0.894 TFLOPS

GeForce 8800 GT Mac Edition

0.336 TFLOPS

GeForce GT 645 OEM

VS

GeForce 8800 GT Mac Edition

Graphics Card

Apr 2012

Release Date

Feb 2008

GeForce 600

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

957 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

91.87GB/s

Bandwidth

57.60GB/s

Render Config

-

6

SM Count

14

288

Shading Units

112

48

TMUs

56

24

ROPs

16

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

64 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

9.600 GPixel/s

37.25 GTexel/s

Texture Rate

33.60 GTexel/s

-

894.0 GFLOPS

FP32 (float)

336.0 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

125W

300 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI

-

Power Connectors

1x 6-pin

Graphics Processor

GF114

GPU Name

G92

-

GPU Variant

G92-270-A2

Fermi 2.0

Architecture

Tesla

TSMC

Foundry

TSMC

40 nm

Process Size

65 nm

1.95 billion

Transistors

0.754 billion

332 mm²

Die Size

324 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

1.1

5.1

Shader Model

4.0

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