... Running four GPU clients does one thing better then almost anything else short of a hair dryer, creates heat! Loads of it, in fact when both rigs were operating the temps in my room have been ridiculous. I was looking for two goals from this build, a reduction in the heat dump and a huge saving on power. I pulled out the 2xGTX470's that have been the stars of my FAH2 rig for months, Sold them off to a friend which covered a large chuck of this upgrade. I've still got the EVGA 680i + Q6600 if anyone is interested. ... Monday night I pulled the Lian Li C32b out my rack and drained the loop, I was off work Tuesday and wanted to be ready to get the new hardware in, since my RAM went Pop my PPD had taken a huge dip which forced me to watch helplessly as the team members I was in competition with raced off ahead. It was the great advice I've received in the short time I've been active on the forums that pushed me toward a 2600K Linux build and I was quite excited to give it a go. In fact it was Ph4ZeD that first mentioned the possibility. Scan as always were great, my gear turned up early afternoon Tuesday. Luckily enough dropping the new CPU, MOBO and RAM into the case and hooking up the EK Supreme HF block into the loop was nice and simple. Took a couple hours to assemble and leak test before I felt confident the case could go back in the rack. ... ... This was my first time with Ubuntu in years, my Linux skills are basic to say the least and I'd had worries of 10.10 not working with the 2600K IGP, I couldn't find much about folks using the Z68 platform utilizing the IGP with Ubuntu, but I knew if I were to come across any trouble the internet would no doubt hold the answers. ... ... I downloaded and burnt off the Ubuntu 10.10 ISO and simply followed THIS guide post for post (thanks TaRkA DaHl). ... At first I stopped once Linux was installed and the FAH client set up, It was jondi_hanluc that noticed I was running the wrong kernal, so back to the guide I went and pushed on a little further. He'd mentioned BFS and TPFs, I dont have a clue what those things are but I wanted them.. Anyone wanna shed some light on what BFS and TPFs are/is? After installing the 'generic-ck' kernel I also installed and set up 'Langouste', again I've really no idea what it does... something about simultaneous upload/downloads when sending results and receiving a new work unit??. . . it was in the guide... so it got installed. Anyway.. it's set up and folding, It's running Ubuntu 10.10 native with no Windows partition so once I started Overclocking I hit my first problem, how was I meant to test for stability. I took the CPU from stock to 4.5Ghz using this great P67 Sandy Bridge overclocking guide at Clunk.org. Currently I'm running at 100x45 @1.275v, this is my first use of a uEFI interface, tbh I already miss the bleak raw interactions of the old styled BIOS. I was able to install Phoronix Test Suite minus the GUI and run a few CPU stress tests but wasn't overly fond of it. I'd love to have Intels Linpack up and running.. I installed WINE as I'd heard a few good overclocking tools worked well, namely parts of OCCT. I've not tried OCCT using WINE yet so I cant back that up. I can tell you CPUZ is useless thou. In the end I thought the FAH client will do as a stress test and just monitored to see if it had locked up (which it did, took the vcore from 1.25v to the current level and all has been well). Overall I found the install process to be exciting and would recommend it to anyone building a 24/7 folding rig. There are still two things I'd like Ubuntu to be able to do easier, show correct CPU frequency when overclocked (currently struggling to get i7z working for this) and for my temps shown in the top bar not to disappear with every reboot, I think that has something to do with adding the sensors to a log file or something.. I'll get there.. with a little help. ... Question to all members folding BigAdv on a 2600K, how long does a work unit take to complete? what sort of performance/time per step are you seeing? So far my new build has completed one BigAdv work unit, it took 23 hours at about 27-32 minutes per step. Is that about par (It was only OC'd for about 2/3 of the unit)? ... With Ubuntu showing my CPU frequency at 3.4Ghz I'm worried its not kicked into turbo mode and so not folding at the full extent of the overclock (4500MHZ), FAHMON shows about 40k PPD is that about right? Any advice/recommendations? J.