NVIDIA GeForce GT 645 OEM vs ATI Radeon X1550 PCI

VS

NVIDIA GeForce GT 645 OEM

ATI Radeon X1550 PCI

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 256MB VRAM Radeon X1550 PCI 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 5 years and 3 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (91.87GB/s vs 4.256GB/s)

288 additional rendering cores

ATI Radeon X1550 PCI 's Advantages

Lower TDP (27W vs 102W)

Score

GeForce GT 645 OEM

VS

Radeon X1550 PCI

Graphics Card

Apr 2012

Release Date

Jan 2007

GeForce 600

Generation

Radeon R500 PCIe

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

957 MHz

Memory Clock

266 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

4.256GB/s

Render Config

-

6

SM Count

-

288

Shading Units

-

48

TMUs

4

24

ROPs

4

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

1.808 GPixel/s

37.25 GTexel/s

Texture Rate

1.808 GTexel/s

-

894.0 GFLOPS

FP32 (float)

-

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

27W

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

RV516

-

Fermi 2.0

Architecture

R500

TSMC

Foundry

UMC

40 nm

Process Size

80 nm

1.95 billion

Transistors

0.107 billion

332 mm²

Die Size

100 mm²

Graphics Features

12 (11_0)

DirectX

9.0c (9_3)

4.6

OpenGL

2.1

1.1

OpenCL

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

3.0

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