Good catch, it was the Pro version ($15 off regularly plus $50 off for the combo. deal). Pretty good board BTW so far. I fell for the RAID migration trap though - you can't move a bootable RAID array across different Intel chipset verions (e.g., from ICH10R to PCH). That cost me about a day restoring data from backups.
Wow, I'm glad you mentioned that. Will probably save me some heartache in the future...
What kind of performance gains can one expect from IB?
I am kinda of getting an itchy trigger finger on a 2500K+Z68 combo.
I will be upgrading from a 2009 Core2Quad Q9550.
FWIW, I couldn't hold off and upgraded to a 2500k a couple of months ago. Going from an i7 920 @ 3.95 to this 2500k @ 4.54, I was extremely impressed at the performance gain. I was originally just going to keep my main rig on the 920, but after seeing the 2500k in action I couldn't hold off. I'm only getting about 32% more performance right now (15% faster clock/clock, 14% faster clocks), but when I was going through my overclocking regimen it was still going strong at 4.7+. I just decided to go from that extremely loud fan setting on the 920 with all antec 900 case fans on high, to a quiet rig with all antec 900 fans set on low, instead. And I went completely budget on this rig, I got a $94 mitx mobo, a $25 cpu cooler, and paid $40 or so for the ram.
I've had a few discussions with poeple since my upgrade, and from what I can tell you're probably looking at IVB being ~ 5-7% faster clock/clock, and it will probably OC by an extra 5-10%. So figure 1.06 x 1.075 = 14% faster approximately overall. Not bad at all for a tick, but that probably wouldn't be enough to get me to keep running a Q9550 for the next 3 months.