Re: Seeking cheap replacement for 6150SE
I agree with Redeemed. If a 64bit OS is indeeed installed as the Compaq/HP site states extra RAM will help more than an add in card. Especially if you've only got a 250watt PSU.
If you've got them hooked up to 1920x1200 displays, then I might consider an add in GPU. of course then you might have to consider a higher watt PSU.