I was reading an old (Dec. 29, '11) (p)review of the new i7-3820, http://www.anandtech.com/show/5276/intel-core-i7-3820-review-285-quadcore-sandy-bridge-e/1, (now available without having to buy a combo BTW), by Mr. AnandTech himself, Anand Lal Shimpi, when I ran across the following quote from the Comments section of this article by chizow:
"RE: 16 vs 40 pcie lanes by chizow on Thursday, December 29, 2011
There's not much benefit when using 2xPCIE 2.0 single-GPU cards with PCIE 2.0 x8 slots. They just don't need that much bandwidth.
With multi-GPU cards however, that PCIE 2.0 x8 starts to choke them a bit and x16 starts showing its benefits.
Another thing to keep in mind too is that with X79 (and IB?) they support PCIE 3.0, so with PCIE 3.0 cards, PCIE 3.0 x8 is the equivalent of PCIE 2.0 x16 in terms of bandwidth. Should be beneficial for multi-card solutions especially with multi-GPU cards."
Is it true that we GTX590 owners and other multi-gpu cards are actually being limited by the x8 PCI-E lanes using P67 and Z68 motherboards?
If so, would it be a worthwhile investment in an i7-3820 or other Sandy Bridge E cpu and motherboard to keep our multi-gpu cards a little more future-proof?
Or, am I reading a little too much into this, it's too close to IvyBridge (which has been delayed once again to, I believe, July, 2012) or is this all just a load of crap?
Even at this seemingly late date with regards to IvyBridge, this is still quite a doable project at a fairly low cost.
The Egg is selling these 3820's for $319.99 with none of their "Combo Required for Purchase" nonsense. There are some quite good LGA 2011 motherboards at a fairly reasonable price, there are now adaptors for watercooling blocks so that would save some more money, and some quite good prices on XMP supported Quad memory modules.
What I'm trying to do is just skip Fermi altogether and wait for the generation after that to update my videocards. They're both still too new to be outdated before Gen.3 PCI-E is made available in another year or two, or whenever. PCI-E 3.0 ain't a done deal until the units are available for sale. Nothing but vaporware until then.
I'm really not looking for an excuse for a new build. I don't need any excuse. If/when I decide on a new build then it's already halfway done. Or more. All I need for a completely new build is a cpu, mobo and memory. I always keep a new build in this half-completed state for just such things as this. It's already built for IvyBridge and everything has been tested with another cpu, mobo and memory. Ready to fire up within hours of the arrival of the 3 major components.
All I'm looking for is some comments as to whether this is a good idea or not.