Quote Originally Posted by Ototero
Yes Lars, here is a cut-and-paste.

Faulting application proth_sieve_sse2.exe, version 0.0.0.0, faulting module , version 0.0.0.0, fault address 0x00000000.



I have XP Pro SP2 running on AMD 64 3000+

Seems very little to go on.
This looks more like a programm error then a hardware problem to me.
"fault address 0x00000000" is typical for a invalid pointer operation which can happen if a local variable is not correctly initialised.

Have you tried the cmov variant of the application also or is it slower on the AMD 64?

Lars