I got i7 920, 8 gb ddr3 1333ram, zotac 9600gt super cloked, p6t-se mobo. I found out that in ddr3 in need multiples of 3. so 3-6-9-12-and so on. So iff i buy 4gb more ram will i see i good chunk of performance boost? My start up time is SLOW. Cuz i got W7 Server 2008 R2.
More aboutwill upgrade noticable
No. You need to reduce the number of windows start up programs for faster boot times. Can't help you there.
So now its running 8gb at ddr2, if i switch to 12gb ddr3 wont be decent upgrade?
It might help, but I haven't seen too many servers with more ram than you have. I worked at dell installing ram and cpus in their server boards for a short time.