NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 650

Table of Contents

Graphics Processor

GPU model GK107 GK106
GPU variant GK107-300-A2
Architecture Kepler Kepler
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors 1,270 million 2,540 million
Die size 118 mm² 221 mm²

Graphics Card

Release date Jun 5th, 2012 Nov 27th, 2013
Generation GeForce 600 GeForce 600
Production End-of-life End-of-life
Launch price 99 USD
Interface PCIe 3.0 x16 PCIe 3.0 x16
Predecessor GeForce 500 GeForce 500
Successor GeForce 700 GeForce 700
Reviews 17 in our database

Clocks

GPU clock 902 MHz 1058 MHz
Memory clock 891 MHz 1782 Mbps effective 1250 MHz 5 Gbps effective

Memory Configuration

Memory size 2 GB 1024 MB
Memory type DDR3 GDDR5
Memory bus width 128 bit 128 bit
Bandwidth 28.51 GB/s 80.00 GB/s

Render Configuration

Shading units 384 384
TMUs 32 32
ROPs 16 16
SMX count 2 2
Cache L1 16 KB (per SMX) 16 KB (per SMX)
Cache L2 256 KB 256 KB

Performance

Pixel rate 7.216 GPixel/s 8.464 GPixel/s
Texture rate 28.86 GTexel/s 33.86 GTexel/s
FP32 (float) performance 692.7 GFLOPS 812.5 GFLOPS
FP64 (double) performance 28.86 GFLOPS (1:24) 33.86 GFLOPS (1:24)

Dimensions & Outputs

Slot width Single-slot Single-slot
Length 145 mm 5.7 inches 147 mm 5.8 inches
TDP 65 W 65 W
Suggested PSU 250 W 250 W
Outputs 1x DVI1x HDMI1x DisplayPort 1x DVI2x DisplayPort
Power connectors None 1x 6-pin
Board number P2011

API Support & Features

DirectX 12 (11_0) 12 (11_0)
OpenGL 4.6 4.6
OpenCL 3.0 3.0
Vulkan 1.1 1.1
CUDA 3.0 3.0
Shader model 5.1 5.1

Other Features

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