NVIDIA GeForce GT 645 OEM vs ATI Radeon HD 4250

VS

NVIDIA GeForce GT 645 OEM

ATI Radeon HD 4250

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 512MB VRAM Radeon HD 4250 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 2 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (91.87GB/s vs 6.336GB/s)

248 additional rendering cores

ATI Radeon HD 4250 's Advantages

Lower TDP (25W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +1762%

0.894 TFLOPS

Radeon HD 4250

0.048 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 4250

Graphics Card

Apr 2012

Release Date

Feb 2009

GeForce 600

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

957 MHz

Memory Clock

396 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

6.336GB/s

Render Config

-

Compute Units

2

6

SM Count

-

288

Shading Units

40

48

TMUs

4

24

ROPs

4

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

64 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

2.376 GPixel/s

37.25 GTexel/s

Texture Rate

2.376 GTexel/s

-

894.0 GFLOPS

FP32 (float)

47.52 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 VGA 1x S-Video

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

RV620

-

GPU Variant

RV620 LE

Fermi 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.95 billion

Transistors

0.181 billion

332 mm²

Die Size

67 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.1

OpenCL

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

4.1

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