VT-d supported in i7-965 but removed from i7-975??? Why?

VT-d supported in i7-965 but removed from i7-975??? Why?

I see that the i7-965 processor supports Intel Virtualization Technology for Directed I/O (VT-d) but the i7-975 does not. Was VT-d removed from the newer i7-975processor? Was there some sort of perfomance degredation or compromise in order to run that CPU at its higher clock speed which necessitated the removal of the VT-d feature?
Or is Intel's documentation incorrect. If anyone has the i7-975 CPU can you run one of those CPU utitlites (Intel or third party) that shows whether that processor supportsVT-d? Thanks!

Also, are any of these processors "unlocked" where the frequencies can be adjusted in the BIOS with latest Asus motherboards forusing the latest high speed DDR3 memory such as 2000 MHz (PC3-16000)or 2133 MHz (PC3-17000)?

Comparison between i7-965 vs i7-975
(scroll all the way to the bottom and notice 965 supports VT-d but 975 does not)

i7-975 (no VT-d)

i7-965 (supports VT-d)


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I checked into this for you. Looks like the correct answer is that since VT-d is not a processor feature but a chipset feature,it should NOT be listed as an Advanced Technologies feature for either i7-965 or i7-975.

The product page has been modified to reflect this.

David Ott

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