VanguardLH wrote:
Mario Andretti wrote:

Installed i5-3570K into GA-Z68MA-D2H-B3 mobo. I am not getting the
RDRAND feature! The rdrand instruction results in "illegal opcode".
Looking at the feature vector of the cpuid instruction reveals rdrand
as absent.

Bit 30 (counting from zero) of ecx will indicate presence of rdrand
according to http://www.intel.com/Assets/PDF/appnote/241618.pdf.

http://www.intel.com/content/dam/www...ion-update.pdf
Errata (sheet 3 of 4), page 11
Number 54

The comment field is supposed to be clickable but didn't work for me, so
jump to page 31 for the "BV54" section.

Good catch, a fixable issue.

No, I don't do assembly coding on IA-86/64 architecture nor do I have
this processor and mobo setup. I just Google around and hope the above
article addresses your concern. Yeah, I know your reaction will likely
be "farking Intel, farking Gigabyte, won't work together, I'm screwed".