ECS GOAL3+ + Sempron 3000+ CPU Motherboard - What is its performance?

Well, don't expect anything spectacular, as the Sempron isn't really designed for performance computing.

Poor. It's incredibly outdated tech. Are you buying for resale or for personal use? If resale, you can't easily resell it. No ability to run dual core CPUs (socket 754). For personal use it should suffice for menial day to day work and web browsing; about as fast as a Sempron LE-1100 (a 1.9GHz AM2 cpu that is now discontinued). Unless you're getting that cpu/mobo combo for less than $50, I wouldn't even consider touching it. Better Idea would be a cheap open box mobo and new Sempron 140 off newegg (if you're in the US). That combo was "new" in 2006, and even then built upon previous generation tech. I haven't seen that combo for a couple years now.

I just picked up a sempron 1250LE for $59.99 at Fry's and it works ok for general use. Fry's combos change every few days. This one came with a biostar 6150 chipset board. I flashed the bios, and now it will run with most 95 watt am3 cpus.

Nice combo. I really wish there was a Fry's near me.

the performance is jus a lil short of a usable office build

Really? You mean it can't even power business apps and your average web surfing?