is the GA MA770t UD3P better or worst than yours?? It can be bought for about 40$. seems worst than yours
Considering an X5460 can be bought for about 17$ and the cheapest 1389 opteron i've seen was almos 40$, opteron seems not cheaper. Maybe you show us where you buy them cheap.
as ddr3, that mem for xeon is not expensive. You can buy my exact same kit, KHX1600c9d3b1k2/8gx second hand for about 40€ and you´ll get a nice performance. in fact, you can buy a 4gb 1333mhz stick in a spanish retailer for less than 22€.
for what i've seen now, and according to numbers, it's to be seen that opteron is a cheaper rig than the xeon counterpart. it's possible that a xeon rig costs a bit more, but almost neglectible amount of difference.
We have to see if opteron can perform better in synthetic than the xeon, which, in numbers, it is outperformed by the xeon. And going for games, we would have to have all three (or more mates), the same graphic card, which is a bit difficult.
The only way of possible comparaison is in synthetic, where it seems opteron does not do well.