NVIDIA GeForce GTX 280 vs NVIDIA GeForce GT 640

VS

NVIDIA GeForce GTX 280

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 280 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 280 's Advantages

Larger VRAM bandwidth (141.7GB/s vs 28.51GB/s)

NVIDIA GeForce GT 640 's Advantages

Released 4 years late

More VRAM (2GB vs 1024GB)

144 additional rendering cores

Lower TDP (65W vs 236W)

Score

Benchmark

FP32 (float)

GeForce GTX 280

0.622 TFLOPS

GeForce GT 640 +11%

0.693 TFLOPS

GeForce GTX 280

VS

GeForce GT 640

Graphics Card

Jun 2008

Release Date

Jun 2012

GeForce 200

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1107 MHz

Memory Clock

891 MHz

Memory

1024MB

Memory Size

2GB

GDDR3

Memory Type

DDR3

512bit

Memory Bus

128bit

141.7GB/s

Bandwidth

28.51GB/s

Render Config

-

30

SM Count

-

240

Shading Units

384

80

TMUs

32

ROPs

16

-

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

19.26 GPixel/s

Pixel Rate

7.216 GPixel/s

48.16 GTexel/s

Texture Rate

28.86 GTexel/s

-

622.1 GFLOPS

FP32 (float)

692.7 GFLOPS

77.76 GFLOPS

FP64 (double)

28.86 GFLOPS

Board Design

236W

TDP

65W

550 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

GT200

GPU Name

GK107

G200-300-A2

GPU Variant

GK107-300-A2

Tesla 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

65 nm

Process Size

28 nm

1.4 billion

Transistors

1.27 billion

576 mm²

Die Size

118 mm²

Graphics Features

11.1 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

1.3

CUDA

3.0

4.0

Shader Model

5.1

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