depends on what games are you talking about?
and more info is required.
a Core i5 what?
8GB of what sort of memory?
ATI Radeon make/model? (but 1GB will struggle with games)
onboard sound is sufficient, but it may only support 2.1, if you want 5.1 surround sound, an add-on card may be required.
will it have an SSD?
what watts is the PSU?
