Quick update and then I'll catch up on comments!
Cable sewing is done....unless I decide to do some of the odds and ends power connectors. Past week or so, I've been working on cable management and overclocking. I've shortened/lengthened various cables....now that everything is just about in its final place. Still a few to go...but it's starting to look neater. I'll take an updated round of pictures of cable management as soon as I finish redoing the SATA power cable. I'm going to put all 16 SSD's on the same cable, instead of having two separate ones.
For overclocking....this is my first build where I'm attempting a serious overclock. I've done it in the past...but always something mild. So far, I've found everything on this board and it's BIOS pretty easy to use. My general approach is to use fixed voltage first and determine the lowest vcore a particular CPU frequency will require, and then try and create an offset voltage profile to mimic the results of the fixed voltage profile.
I'm using a baseclock of 100, and I have my memory overclocked to 2,133 Mhz. Everything at a 47 multiplier and below was super easy to hit and the temperatures are still phenomenal. At 4.7 GHz the average CPU core temps stay in the 50's even when running Prime 95 for 12+ hours.
It starts to get more interesting at a 48 multiplier. The jump from 4.7 GHz to 4.8GHz is a larger increase in voltage and temperatures than anything below this. I've found stability for my CPU at a vcore of 1.39 volts. I'm achieving this by using fixed voltage of 1.37 volts with the LLC set to 1 (highest Asrock setting). This gives me vcore of 1.39 volts at full load, and about 1.35 volts while idling. Temperatures are still pretty good. When running large FFT's in P95, the temperatures stay in the 50's. When running small FFT's in P95, the temperatures get up into the 60's. I've succesfully run Intel Burn Test on Very high with 30 loops....and I've run P95 blended for 12 hours. I know some will argue I need to do it for 24 hours....and I may.....but this is plenty to zero in on what kind of voltage I need. The VID at full load and 4.8GHz for my CPU is 1.396,....so I'm hoping I'll be able to get away with a very small positive offset when I'm ready to go this route.
For a 49 multiplier....it heats up more. I've found "stability" for my CPU at a vcore of 1.44 volts on full load. Right now, I'm achieving this with fixed voltage of 1.42 and LLC of 1 (highest). It gives me 1.44 volts at full load and about 1.4 volts while idling. The VID at full load is 1.4011 which is only a tad more than it was at 4.8 GHz. I'll play with offsets later. I've only run 6 hours of P95 at this setting....but I'll do more at some point. I can do 30 loops through IBT on very high. I think it will prove stable. Temps increase somewhat at 4.9GHz. They were in the upper 50's / mid 60's on the large FFT's in P95, depending on the size of the FFT. But the small FFT's could heat things up to lower 70's. Still acceptable....but getting hotter.
For a 50 multiplier.....I can boot, load windows, and run certain benchmarks. Everything GPU related (even though they tax the CPU also) seems fine. But so far I can't get very far on a P95 run at 5.0 GHz. I don't think it's temperature related...because even though some individual cores can reach 80, the average across all cores stays in the 70's....and it should be able to run at that. I may just be hitting the limits of my silicon. We will see.
But...since I can run GPU benchmarks, I took some time to play with 3D mark with the CPU at 5.0GHz and an overclock on the 690's also. I can only up the GPU clock on the 690's by 135 Mhz before I start encountering issues....but this is fairly normal limits from what I've read. I can push the memory on the 690's by 685 Mhz....so I'm getting a pretty good bump there. . Got a real nice score of 26,413
which places it at #15 on the Hall of Fame right now for the latest version of 3DMark 11 performance benchmark for 4x GPU systems.
It would rank a little lower if you included the 3x GPU systems...because 3x Titans can out perform two 690's. But mine is the highest scoring GTX 690 system on the 1.05 version of 3DMark Performance right now. Although I'm sure that will change as some of the super systems that haven't run the 1.05 version of the benchmark go back and do so. But I'm happy with the results....regardless.