NVIDIA GeForce GT 645 OEM vs ATI Radeon HD 4450

VS

NVIDIA GeForce GT 645 OEM

ATI Radeon HD 4450

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 512MB VRAM Radeon HD 4450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (91.87GB/s vs 6.400GB/s)

208 additional rendering cores

ATI Radeon HD 4450 's Advantages

Lower TDP (25W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +831%

0.894 TFLOPS

Radeon HD 4450

0.096 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 4450

Graphics Card

Apr 2012

Release Date

Nov 2011

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

957 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

6.400GB/s

Render Config

-

Compute Units

1

6

SM Count

-

288

Shading Units

80

48

TMUs

8

24

ROPs

4

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

64 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

2.400 GPixel/s

37.25 GTexel/s

Texture Rate

4.800 GTexel/s

-

894.0 GFLOPS

FP32 (float)

96.00 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

25W

300 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.3a 1x DisplayPort 1.0

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

RV710

-

GPU Variant

RV710 (215-0725016)

Fermi 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.95 billion

Transistors

0.242 billion

332 mm²

Die Size

73 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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