NVIDIA GeForce GT 645 OEM vs ATI Radeon HD 4650 AGP

VS

NVIDIA GeForce GT 645 OEM

ATI Radeon HD 4650 AGP

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 512MB VRAM Radeon HD 4650 AGP 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 3 years and 7 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (91.87GB/s vs 12.80GB/s)

ATI Radeon HD 4650 AGP 's Advantages

32 additional rendering cores

Lower TDP (48W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +132%

0.894 TFLOPS

Radeon HD 4650 AGP

0.384 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 4650 AGP

Graphics Card

Apr 2012

Release Date

Sep 2008

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

AGP 8x

Clock Speeds

-

957 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

128bit

91.87GB/s

Bandwidth

12.80GB/s

Render Config

-

Compute Units

4

6

SM Count

-

288

Shading Units

320

48

TMUs

32

24

ROPs

8

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

128 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

4.800 GPixel/s

37.25 GTexel/s

Texture Rate

19.20 GTexel/s

-

894.0 GFLOPS

FP32 (float)

384.0 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

48W

300 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

-

Graphics Processor

GF114

GPU Name

RV730

-

GPU Variant

RV730 PRO (215-0719056)

Fermi 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.95 billion

Transistors

0.514 billion

332 mm²

Die Size

146 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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