Hi, I'd like some input on this too. I have the same question Powerlogix or GigaDesigns for thier top end duals (to upgrade my QSDP800). Price diff is significant.
The main difference seems to be the powerlogix uses 7457's with 512 L2 cache, which is twice as much as the GigaDesigns 256k L2. Any other advantage to the 7457 (don't care about running hot or not, my QSDP800 has 47 meeelion fans, plus both of these upgrades are cooled).
Thanks!