video card upgrade

i currently have an onboard geforce 6150 le 512mb. im looking at a radeon hd 4650 and a hd 4350. i am $1.24 short of the 4650. the 4650 has 310 stream processors where as the 4350 has 80. how much of a difference will that make? what other variables will make a big impact on the card? my mobo is pci 16x 1.0

 

Well I think you need to consider also:

Memory Interface (MI) (the higher the more data it can process in one cycle)
GPU Clock (MHz)
Memory Clock (MHz)
RAM

These are the points I would consider and in that order. The MI will dictate who much DATA the card can handle per cycle, the Mem/GPU clocks will dictate who quickly this data can be processed. It is pointless having tons of RAM if you have a small MI and same with GPU and Mem clocks imho.

 

Both are low end cards
The Radeon 4350 is no better than integreated graphics so go with the 4650
Also these cards use PCI Express 2.0 x16 which isn't backward compatible with PCI Express 1.0 only 1.1
Looks like you'll need a new motherboard, this might cause other issues.

Dacads