I agree, it is very hard to find information about motherboards supporting VT-d. What is the point of developping a technology but not market it?
I have been in contact with Intel.
I phoned up their tech support and this was followed up with some emails.
I officially got the following chipsets.
The main reason i wanted this was to expose to the guest OS the Gfx card and have full 3d Accel or close to it in the guest without software emulation like Vmware etc.
Unfortunately i have not found any appropriate motherboards that have the Q45 Chipset yet for my purpose.
I have confirmed that the X48 DOES NOT have the Vt-d (Directed I/O) in it which is ashame. The P45 also does NOT have it in it.
Hope that was some help.
Some cut and paste from my email.
"Dear Sir: Thank you for contacting Intel Customer Support! We are glad to be of service to you. Please be informed that the P45 chipset does not have the VT-d. You may check on page 23 of our datasheet from the link below: [http://www.intel.com/Assets/PDF/datasheet/319970.pdf] However, we still need to verify whether the X48 chipset has this feature available. We will get back to you on this as we need to escalate that query."
"Dear Sir: Thank you for contacting Intel Customer Support! We are glad to be of service to you.We have received update about this escalation. It is confirmed that the X48 chipset does not have Vt-d feature. It is exclusively available with the Q45 GMCH desktop chipset."
I contacted Asus asking if the P5E64 WS Professional motherboard supported VT-d. It has a X38 chipset which I believe (but not convinced) that supports the VT-d technology. Here is the response I got within 24 hours:
No this motherboard does not support this feature.
Lead Support Technician
I replied thanking him for the answer and asking if they have any motherboard that supports VT-d. It has been two days and I have not received any answers yet.
Now according to this article, the Intel motherboard DX38BT equipped with the X38 chipset supports VT-d, or at least, it shows up in the BIOS. Now that we have a confirmation that X48 does not support it, I do not know what to think about the X38 chipset.
VT-d is the only reason I go for Intel. If I have to purchase a normal motherboard, I will go for AMD (always trying to keep some competition on the market).
I not so sure about the support on X48
I phoned the ASUS support in US yesterday regarding their P5SE64 Evolution board (which uses the x48 chipset) and they confirmed that it HAS support for VT-d.
Also, in this forum http://software.intel.com/en-us/forums/virtualization-software-development/topic/56802 there is somebody who got a reply from Intel that both X38 and X48 has "VT-d capability, but OEMs may not have enabled in systems based on these"
Also in this review the VT-d support is mentioned: http://www.trustedreviews.com/motherboards/review/2008/01/03/Intel-DX38BT-X38-Motherboard/p2
It seem like everybody is a little confused about this, even people at Intel...
To my question regarding if ASUS has any motherboard supporting VT-d, this is the answer I got today:
You'll primarily find Vt-d support in server boards(not
desktop/workstation boards) - Intel's official stance has been iffy, at
best, but the Q35 and Q45 northbridge chipsets offer Vt-d support, and
you also have to have a CPU that offers support as well, like the newer
Xeons. Intel's own forums can shed a little more light on the subject,
Asus Support Team
So indirectly, they admit not supporting VT-d. A statement which goes in conflict with the phone call to Asus described previously in this thread.
Now what? We need to find someone who actually got VT-d running and ask what motherboard that individual used. This is the only way to be sure...
BTW, what is VT-d used for on business servers? I feel that this technology would be more of use for desktops, except perhaps the very few businesses using virtualisation but need specialized hardware cards to crunch numbers...
2007 and 2008 Desktop system (Q35/Q45) with vPro logo and 2008 Mobile systems (GM45/PM45) with Centrino2 vPro logo will support VTd.
It needs the Intel(R) Core(TM)2 Duo or Intel(R) Core(TM)2 Quad CPU.
Okay, so the Q45 chipset supports VT-d for sure, the Q35 aparently does too, and then there are some chipsets that may support VT-d but no motherboards can be found that actually enable it, so for now we have to settle for the Q45/Q35. Right.
Since most of us want to use VT-d to give one virtualized guest control over one video card, and use a second video card for a second virtualized guest, we are looking for a motherboard that enables us to do this. In other words: we're looking for two PCI-e 16x slots.
Now there are plenty motherboard that feature two PCI-e 16x slots, but I don't see any of them with the Q45/Q35 chipsets. I saw some ASUS motherboards based on the X38 and X48 chipsets that feature 2x PCI-e 16x, but according to the postings above they haven't enabled VT-d...
So my question is: has anyone out there been able to actually use VT-d yet? For something useful?
Im also in search for the motherboard which supports Q45 Chipset also supports 16Gig DDR2 memory.. I found out this on the web .. I am getting back into Intel technologies .. I don't have any clue how good this motherboard is .. The company called IBase MB945 with Q45 Intel chipset .. I am tryiing to find the Motherbpard manual to confirm myself it does support Vt-d technologies ..
If anybody bought this borad and using .. please through some light on this .. thanks Much ...
Here is a motherboard that supports VT-d for sure: ASUS P6T Deluxe
See article below, there is a screenshot from BIOS where you can enable or disable VT-d
NOTE that this motherboard is for Intels new core i7 processors only
ASUS P6T Deluxe has vt-d support.
Note that this motherboard is for Intel Core i7
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