NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 295

Table of Contents

Graphics Processor

GPU model GK107 GT200B
GPU variant GK107-300-A2 G200-401-B3
Architecture Kepler Tesla 2.0
Foundry TSMC TSMC
Manufacturing process 28 nm 55 nm
Number of transistors 1,270 million 1,400 million
Die size 118 mm² 470 mm²

Graphics Card

Release date Jun 5th, 2012 Jan 8th, 2009
Generation GeForce 600 GeForce 200
Production End-of-life End-of-life
Launch price 99 USD 500 USD
Interface PCIe 3.0 x16 PCIe 2.0 x16
Predecessor GeForce 500 GeForce 9
Successor GeForce 700 GeForce 400
Reviews 74 in our database

Clocks

GPU clock 902 MHz 576 MHz
Memory clock 891 MHz 1782 Mbps effective 999 MHz 1998 Mbps effective
Shader clock 1242 MHz

Memory Configuration

Memory size 2 GB 896 MB
Memory type DDR3 GDDR3
Memory bus width 128 bit 448 bit
Bandwidth 28.51 GB/s 111.9 GB/s

Render Configuration

Shading units 384 240
TMUs 32 80
ROPs 16 28
SMX count 2
Cache L1 16 KB (per SMX)
Cache L2 256 KB 224 KB
SM count 30

Performance

Pixel rate 7.216 GPixel/s 16.13 GPixel/s
Texture rate 28.86 GTexel/s 46.08 GTexel/s
FP32 (float) performance 692.7 GFLOPS 596.2 GFLOPS
FP64 (double) performance 28.86 GFLOPS (1:24) 74.52 GFLOPS (1:8)

Dimensions & Outputs

Slot width Single-slot Dual-slot
Length 145 mm 5.7 inches 267 mm 10.5 inches
TDP 65 W 289 W
Suggested PSU 250 W 600 W
Outputs 1x DVI1x HDMI1x DisplayPort 2x DVI1x HDMI
Power connectors None 1x 6-pin + 1x 8-pin
Board number P2011 P657
Width 111 mm 4.4 inches
Height 38 mm 1.5 inches

API Support & Features

DirectX 12 (11_0) 11.1 (10_0)
OpenGL 4.6 3.3
OpenCL 3.0 1.1
Vulkan 1.1
CUDA 3.0 1.3
Shader model 5.1 4.0

Other Features

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