I have a powerspec 8735 pc

You might be better off Downloading Cpu-Z http://www.softpedia.com/progDownl [...] -6980.html
This will tell you most things about your motherboard, memory and Graphics bus.

You have an onboard video chip (designated S3 video driver on the link I provided). If you have never installed a graphics card, best idea would be to open the case up and look on the MB for the presence of a PCIE express expansion slot.

http://www.powerspec.com/support/s [...] ction=8735

Here you go. Says you have an open AGP slot. So, no PCIE sot, only AGP.

http://www.powerspec.com/systems/a [...] ction=8735

are there any geforce cards under 30 dollars that will fit my computer?

Have a look through these AGP capable video cards at Newegg.

http://www.newegg.com/Product/Prod [...] rder=PRICE

ebay might be an option for you. you don't wanna spend very much, and you may be able to find a fairly capable card used for around $30 if you're lucky.

Here's the latest graphic card update from Toms, still has a section on AGP cards. Also on the last page is a hierarchy chart showing relative power of the graphic cards in a tier system. Just because a card costs more doesn't mean it's better
http://www.tomshardware.com/review [...] ,1965.html

Seems to be better choices at www.tigerdirect.com for AGP cards. Here's one, it's probably better to shop around at E-bay for a better deal. This one is $60 so it's over your budget.
http://www.tigerdirect.com/applica [...] CatId=1826