Windows 7: Would it be ok to add this just for OS

Would it be ok to add a smaller SSD just for the OS like a 30gb?
My specs
Operating System
MS Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 3770K @ 3.50GHz 32 °C
Ivy Bridge 22nm Technology
RAM
16.0 GB Dual-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
Gigabyte Technology Co., Ltd. B75M-D3H (Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz) 28 °C
Graphics
VE247 (1920x1080@60Hz)
HP S2031 (1600x900@60Hz)
1023MB GeForce GTX 550 Ti (Undefined) 43 °C
Hard Drives
932GB Western Digital WDC WD10EALX-009BA0 (SATA)
Optical Drives
ATAPI iHAS124 C
Audio
Realtek High Definition Audio
And could I just use my windows 7 reinstall disc that came with my computer and use the key on the side of my computer to install to SSD? It isn't OEM windows I think it didn't have any bloatware or anything.
Could you guys suggest some SSD's that are good but cheaper still? Thanks

Not too sure about the reinstall disc, but regarding the SSD I would say a minimum of 60/64GB, they are so cheap now, 30GB would really be pushing it for space.

Ok thanks. But I really need to know about the reinstall

Understandable yes, last thing you want is to have to buy a new copy of Win 7 as well.

Hopefully someone else can help you there.

I'm sure I can contact support from microsoft on that?

what about a intel 330 120gb from amazon for 90 bucks

You'd want one large enough for your OS, paging file and programs to benefit most from the increased speeds.

Then follow these steps to Clean Reinstall - Factory OEM Windows 7 which steps are the same for retail.

You can then link your User folders from the HD by rightclicking each in the new Windows 7 to add to the related Library - Include a Folder - Windows 7 Forums .

But you'd want to copy them off of the old Windows 7 first to delete and reformat partition which is the proper way to uninstall the old OS.

As long as you are installing your copy of Windows 7 to the same computer, you can activate it using the product key on the side of your computer. I have done a number of re-installs myself doing just that and haven't had any problems.