NVIDIA GeForce GT 645 OEM vs ATI Radeon HD 4750

VS

NVIDIA GeForce GT 645 OEM

ATI Radeon HD 4750

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 512MB VRAM Radeon HD 4750 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 2 years and 7 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (91.87GB/s vs 51.20GB/s)

ATI Radeon HD 4750 's Advantages

352 additional rendering cores

Lower TDP (100W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon HD 4750 +4%

0.934 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 4750

Graphics Card

Apr 2012

Release Date

Sep 2009

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

957 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

128bit

91.87GB/s

Bandwidth

51.20GB/s

Render Config

-

Compute Units

8

6

SM Count

-

288

Shading Units

640

48

TMUs

32

24

ROPs

16

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

128 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

11.68 GPixel/s

37.25 GTexel/s

Texture Rate

23.36 GTexel/s

-

894.0 GFLOPS

FP32 (float)

934.4 GFLOPS

74.50 GFLOPS

FP64 (double)

186.9 GFLOPS

Board Design

102W

TDP

100W

300 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x S-Video

-

Power Connectors

1x 6-pin

Graphics Processor

GF114

GPU Name

RV740

-

GPU Variant

RV740 PRO

Fermi 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.95 billion

Transistors

0.826 billion

332 mm²

Die Size

137 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

4.1

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