NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce GTX 650 Ti Boost

VS

NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce GTX 650 Ti Boost

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 2GB VRAM GeForce GTX 650 Ti Boost 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

Lower TDP (75W vs 134W)

NVIDIA GeForce GTX 650 Ti Boost 's Advantages

Released 11 months late

Boost Clock1032MHz

More VRAM (2GB vs 1536GB)

Larger VRAM bandwidth (144.2GB/s vs 38.40GB/s)

624 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce GTX 650 Ti Boost +281%

1.585 TFLOPS

GeForce GT 640 OEM Rebrand

VS

GeForce GTX 650 Ti Boost

Graphics Card

Apr 2012

Release Date

Mar 2013

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

800 MHz

Memory Clock

1502 MHz

Memory

1536MB

Memory Size

2GB

DDR3

Memory Type

GDDR5

192bit

Memory Bus

192bit

38.40GB/s

Bandwidth

144.2GB/s

Render Config

-

3

SM Count

-

144

Shading Units

768

24

TMUs

64

24

ROPs

24

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

384 KB

L2 Cache

384 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

16.51 GPixel/s

17.28 GTexel/s

Texture Rate

66.05 GTexel/s

-

414.7 GFLOPS

FP32 (float)

1.585 TFLOPS

34.56 GFLOPS

FP64 (double)

66.05 GFLOPS

Board Design

75W

TDP

134W

250 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

None

Power Connectors

1x 6-pin

Graphics Processor

GF116

GPU Name

GK106

GF116-150-A1

GPU Variant

GK106-240-A1

Fermi 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.17 billion

Transistors

2.54 billion

238 mm²

Die Size

221 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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