Popped these into a Biostar N68S3+ motherboard with an Athlon II X3 455 running Windows XP Home. No complaints here.
Under $20 and free shipping for 4GB. You have to be crazy to pass on this deal. Worked right out of the package, no tweaks required for stock settings ; I never heard of Paremma memory, but it seems to be good stuff
Heat spreaders? I don't need no stinking heat spreaders