Best Upgrade to improve Alt-Tab speed during gaming?

[AshkanVafaee]

Hey, here are my computer specs:

GPU: gtx 480
CPU: i5 760
RAM: 4gb DDR3
Hard Drive: 128gb Kingston ssd

What is the best upgrade that I can make to improve the alt-tab speed from in-game to desktop and vice versa.

 

[Elemential]

Shouldn't alt-tab speed already be fast? Like 1.2ms or something

 

[CobbZ]

Run games in borderless window mode.

 

[cst1992]

Get more RAM.
If your game is writing stuff to disk when you switch windows, it'll benefit from a SSD. And faster RAM definitely helps the game save its progress and let you switch windows.