NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce GTX 650

VS

NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce GTX 650

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 1024MB VRAM GeForce GTX 650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

More VRAM (1536GB vs 1024GB)

NVIDIA GeForce GTX 650 's Advantages

Larger VRAM bandwidth (80.00GB/s vs 38.40GB/s)

240 additional rendering cores

Lower TDP (65W vs 75W)

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce GTX 650 +95%

0.812 TFLOPS

GeForce GT 640 OEM Rebrand

VS

GeForce GTX 650

Graphics Card

Apr 2012

Release Date

Sep 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1250 MHz

Memory

1536MB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

192bit

Memory Bus

128bit

38.40GB/s

Bandwidth

80.00GB/s

Render Config

-

3

SM Count

-

144

Shading Units

384

24

TMUs

32

24

ROPs

16

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

8.464 GPixel/s

17.28 GTexel/s

Texture Rate

33.86 GTexel/s

-

414.7 GFLOPS

FP32 (float)

812.5 GFLOPS

34.56 GFLOPS

FP64 (double)

33.86 GFLOPS

Board Design

75W

TDP

65W

250 W

Suggested PSU

250 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x mini-HDMI 1.4a

None

Power Connectors

1x 6-pin

Graphics Processor

GF116

GPU Name

GK107

GF116-150-A1

GPU Variant

GK107-450-A2

Fermi 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.17 billion

Transistors

1.27 billion

238 mm²

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

2.1

CUDA

3.0

5.1

Shader Model

5.1

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