This is a budget build for moderate gaming such as World of Warcraft and Left 4 Dead 2. Under $700 budget for build (after the PSU since I already bought it a while back on sale) Please rate! Any helpful suggestions are appreciated.
Video Card??? The Sabertooth 55i doesn't have onboard GPU, so you will need one. Also, the MOBO is a great MOBO but a little high in priced for a budget build, so you could cut cost there, if required.
Arguably none none for gaming.
With your current video card, definitely none for gaming.
i5 definitely beats 955 in other tasks.
Another difference would be lack of support for Nvidia's SLI with the 955 board. You could choose another board that does support it, but then you wouldn't have support for ATI's crossfire.
The i5 is a better overclocker, apparently.
Ability to upgrade to a 6-core without having to dish out $1000 in Q2 this year.
Ability to upgrade to new bulldozer desktop processors? Then again, AMD might choose to go with a new socket when they come out in 2011 so it would be a gamble.