NVIDIA GeForce GTX 275 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce GTX 275

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 896MB VRAM GeForce GTX 275 and 1536MB VRAM GeForce GT 640 OEM Rebrand 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 38.40GB/s)

96 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 3 years and 3 months late

More VRAM (1536GB vs 896GB)

Lower TDP (75W vs 219W)

Score

Benchmark

FP32 (float)

GeForce GTX 275 +62%

0.674 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce GTX 275

VS

GeForce GT 640 OEM Rebrand

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

800 MHz

Memory

896MB

Memory Size

1536MB

GDDR3

Memory Type

DDR3

448bit

Memory Bus

192bit

127.0GB/s

Bandwidth

38.40GB/s

Render Config

-

30

SM Count

3

240

Shading Units

144

80

TMUs

24

28

ROPs

24

-

L1 Cache

64 KB (per SM)

224 KB

L2 Cache

384 KB

-

Theoretical Performance

17.72 GPixel/s

Pixel Rate

4.320 GPixel/s

50.64 GTexel/s

Texture Rate

17.28 GTexel/s

-

673.9 GFLOPS

FP32 (float)

414.7 GFLOPS

84.24 GFLOPS

FP64 (double)

34.56 GFLOPS

Board Design

219W

TDP

75W

550 W

Suggested PSU

250 W

2x DVI

Outputs

2x DVI 1x mini-HDMI 1.3a

2x 6-pin

Power Connectors

None

Graphics Processor

GT200B

GPU Name

GF116

G200-105-B3

GPU Variant

GF116-150-A1

Tesla 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

1.4 billion

Transistors

1.17 billion

470 mm²

Die Size

238 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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