NVIDIA GeForce GTX 275 vs NVIDIA GeForce GT 645 OEM

VS

NVIDIA GeForce GTX 275

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 896MB VRAM GeForce GTX 275 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 275 's Advantages

Larger VRAM bandwidth (127.0GB/s vs 91.87GB/s)

NVIDIA GeForce GT 645 OEM 's Advantages

Released 3 years and 3 months late

More VRAM (1024GB vs 896GB)

48 additional rendering cores

Lower TDP (102W vs 219W)

Score

Benchmark

FP32 (float)

GeForce GTX 275

0.674 TFLOPS

GeForce GT 645 OEM +32%

0.894 TFLOPS

GeForce GTX 275

VS

GeForce GT 645 OEM

Graphics Card

Jan 2009

Release Date

Apr 2012

GeForce 200

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1134 MHz

Memory Clock

957 MHz

Memory

896MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

448bit

Memory Bus

192bit

127.0GB/s

Bandwidth

91.87GB/s

Render Config

-

30

SM Count

6

240

Shading Units

288

80

TMUs

48

28

ROPs

24

-

L1 Cache

64 KB (per SM)

224 KB

L2 Cache

384 KB

-

Theoretical Performance

17.72 GPixel/s

Pixel Rate

9.312 GPixel/s

50.64 GTexel/s

Texture Rate

37.25 GTexel/s

-

673.9 GFLOPS

FP32 (float)

894.0 GFLOPS

84.24 GFLOPS

FP64 (double)

74.50 GFLOPS

Board Design

219W

TDP

102W

550 W

Suggested PSU

300 W

2x DVI

Outputs

2x DVI 1x mini-HDMI 1.3a

2x 6-pin

Power Connectors

-

Graphics Processor

GT200B

GPU Name

GF114

G200-105-B3

GPU Variant

-

Tesla 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

1.4 billion

Transistors

1.95 billion

470 mm²

Die Size

332 mm²

Graphics Features

11.1 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

1.3

CUDA

2.1

4.0

Shader Model

5.1

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