Well, it's more than just that.
1. If you only have 150W-200W PSU (Power Supply), you're not going to be able to have many of the cards out there.
2. You need to know the power usage of your CPU (the chip); I'm going to assume you have 1 CD/DVD drive and 1 HDD (hard drive). Thus you most likely don't have any power left as most CPUs take 95W-125W. If you have a graphics card, it's most likely integrated which means the power consumption is probably pretty close to your max of 150W-200W.
3. You need to know the power usage of the GPUs (graphics card) that you want
4. You need to know what type of connection you have to your motherboard. AGP 4x or 8x, PCI, PCI-E(xpress) x1 or x8 or x16, OR PCI-E 2.0 (2.1 cards will also work) x1 or x8 or x16.
AGP is pretty old and mostly phased out and as such is rarely found for GPUs for the new cards; original PCI is hardly used as PCI-E is used nowadays. PCI-E 1.0 is also phased out for the most part. Unless you have a PCI-E 2.0 slot, you're going to need to go search Ebay or find an old card on an overstock site or get lucky and find one on newegg that hasn't been sold out yet.
Overall, you're going to have room for a low end card from either
1. ATI Radeon HD 4000, 5000, or 6000 series (X600 and below; be careful with the 5000 as they use a LOT of power)
2. Nvidia 200, 300, 400, or 500 series (X30 and below)
And even then you'd need to make sure you don't go over.
Edited by user Tuesday, January 25, 2011 2:24:04 PM(UTC)
| Reason: Not specified
