[SOLVED]Classified SR-2 Ubertosh... ripped off and DISAPPOINTED

I started my "Ubertosh" dual Xeon build in mid 2011 using an EVGA Classified SR-2 motherboard and dual Xeon E5680 six-core CPUs and dual Radeon HD 6870s. I never got it up and running thanks to the Radeon's video issues, and it sat in my office for 3 years.

Fast forward 3 years, I got the itch to get the late 2013 Mac Pro, but I balked at the price of the 12-core ($8500 after 64GB of RAM). So I decided to resurrect my Ubertosh. I figured by over clocking to 3.8-4 GHz I could get similar performance to the 2.7GHz 12-core Mac Pro. So I got a faster SSD boot drive and dual GeForce GTX 780's, and this time... success installing Mavericks 10.9.2 on the first go. I guess Unibeast, Multibeast, and OS X have gotten better, plus I used slightly older GPUs (a lot newer than the 6870 NOW but the 6870 was brand new 3 years ago).

I ran Geekbench 3 64-bit at 2.99 GHz and got 14,780. My 2012 15" MacBook Pro 15" gets 12,798 with only 4 cores, and about the same as a quad core iMac i7. So I examined at my system info, and my CPU is identified as 2.4 GHz 4-core Xeon E5620's, not the 3.33 GHz 6-core E5680 I'd paid $1500 each for!!! I just found out I got screwed by eBay seller mgintls, BIG time (he's not on eBay, or he's got a different handle now). Because the base speed is 2.4 GHz and max multiplier is 18X, I have little room to over clock, plus it's got 33% fewer cores. It seems to run OK at BCLK of 166 (2.99 GHz), but got an OS X gray screen of death at BCLK 200 (3.6 GHz).

I feel like I'm pot committed. I've spent about $8K total with the new GPUs, and have a Hackintosh that's basically as fast as an iMac. Very disappointed. I could spend $500 on a pair of Xeon X5670's (X5680's are still $1100 in 3 years!). The X5670 has a max multiplier of 22 vs 25 for the X5680's, so a BCLK of 167 would get me a max of 3.67GHz vs 4.18 GHz for the X5680, and assuming it scales by clock speed and extra cores, should get me to a Geekbench of 27K. (12 core late 2013 Mac Pro is about 33K; it's within the ballpark, I'd be happy with 27K.) But if I'm gonna spend $2500 on X5680's, I might as well just scrap this project and get a Mac Pro.

Allhdd.com has very reasonable prices on server branded (IBM, Compaq, etc.) Xeon chips at very discounted pricing. I'm assuming they all work interchangeably in the right socket, correct?

Any bright ideas would be welcome. Thanks in advance!

Classified SR-2 Ubertosh... ripped off and DISAPPOINTED

I know no one replied to my original post, but a little update. I was cleaning my house a couple of weeks ago and found the X5680 CPUs I'd originally bought in 2011 and thought I'd gotten ripped off on. I don't know where the E5620s came from, but I had NOT gotten ripped off, just misplaced the chips and found some random other Xeons I'd probably bought for work servers!

Well I'd already taken most of my first Ubertosh parts and built a Windows Server 2012 Hyper-V Host with it and bought almost all new Ubertosh parts (see signature). So now the Windows Server will get a 3X power upgrade as I put the X5680s in there. And I get an even bigger upgrade with dual 18-core Xeon E5-2699 v3's. All's well that ends well!