Well for a few days now, the T7500 is up and running. The build is below. I did have a pile of issues while building this machine. Originally the T7500 had a Quadro, 6x2gb of ram, 2x1.5tb HDD, the 1100w PSU and a host of other expansion slot cards. I stripped it down to just the case, went through 4 or 5 cans of compressed air and put it back together. The first attempted bootup with the X5675 Xeons, it throws a PCI card failure code, so I removed everything, tried several GPUs, different configurations of ram/hdd and eventually with only 1 CPU installed. It continued to not boot. Then I figured out it had to be the Bios, so in went 1, 2gb stick of ram, the Quadro it came with and I flash the Bios from A01 to A18. I then confirmed the bios flash worked and installed all 24gbs of ram and only a single, X5675 on the Mobo and tried again. This time it would boot, so I then removed the quadro and installed my GTX 1070. Everything was working decently, other than a very slow boot sequence. After my second order of PC3-10600r, 6x4gb came in, I installed those into the riser. At first, the PC wouldn't post properly. I was reading that sometimes the T7500 riser support begins to sag, so I was planning on putting in a little jack made out of a bolt/screw, which didn't work for unrelated reasons. Then finally, the second CPU riser booted with the PC with the side panel installed.
During the boot sequence however, I get a mismatched/non functioning ram error on the Riser board, DIMM 3, which I can choose to ignore. If I ignore it, the PC still recognizes the full, 48gb of ram and sees DIMM 3 working and utilizes the stick. I did try moving the main, mobo sticks to the riser, which had not thrown errors, however it didn't matter what stick was installed in that DIMM or if I installed no stick at all, it still gave the error. I have chosen to ignore it.
After the second CPU was installed, I of course needed to run benchmarks. The dual, 6 core xeons with 24gb of ram each, definitely out perform my i5-6600k (not overclocked) with 16gb of ram in dual channel. So far I am happy with the setup and when I decide to not be lazy, I will be installing my current 500gb SSD into the Sata->PCIe card to be used as a boot disk for Windows/programs and then using SetFSB to overclock both the ram and the Xeons as much as I can comfortably.
Right now, playing my favored game (Escape from Tarkov) I am utilizing 25-30% of CPU power and around 60% GPU. For the CPUs, they are hovering around 50-60c, which has been standard even when relatively idle, so that is a good sign. Tarkov appears to be spreading the CPU usage across only the physical cores (1, 3, 5, 7 etc) pretty evenly so it is effectively running on 12 cores. I then fired up Space Engineers, which spiked my GPU usage to 99% and kept it pinned, but started using about 60% of CPU1, then after a re-set started using 60% (roughly) of CPU2 instead. It was rather strange. I plan on testing out several games in my library, including some very heavy duty games and updating performance stats as I get them. Overall, I am pleased with how the PC is running. It is fairly quiet all things considered and the performance is good enough. I want to change installation disk of Windows, push a few other things to see how it performs, but even then, I might not with how it is running now.
Dell T7500
2, Xeon X5675 CPUs
48gb PC3-10600r ECC
2x1.5tb 7200rpm WD HDD
1x500gb Silicon Power Ace SSD
Zotac GTX 1070 Amp! Edition
Dell U402f Heatsink
