Time for an update I suppose:
With Covid19 restrictions I've been stuck either gaming, remodeling the house, or working on the ole 790i rig. I ended up trading a GTX1080 for a XFX DD 5700, which was installed in my HTPC. I ended up finding a Titan Xp (Jedi collection edition) on ebay for an OK price. It works without issues. At stock speeds it wasn't much of a bump from the 1080 amp edition, but the titan oc's a bit. I was able to get it to 2050 core and +300 mem. In terms of noise however, the thing sounds like a jet engine during take off. I suspect an after market 1080ti, such as the AMP extreme, may ultimately perform better on this platform.
I tried playing with the CPU OC as well, but really only exceeded in 12 hours spent, +100mhz, and a few more grey hairs. This chip seems to cap out right at 4.2ghz. I tried using 2 ram dimms, different dimms, and an array of fsb settings trying to jump over any "fsb holes". In the end it just wouldn't go one step further.
During all of the OC attemps, I did find out that my dimm4 socket is a bit loose. When mounting the ram cooler I'd occasionally be stuck at "80" or "C1" debug codes. Before I caught this I figured the OC settings weren't stable and would try something else. Re-seating the ram once or twice seems to fix the issue. If it gets worse I may have to replace it.
Once I settled on 4.2ghz on the CPU, I tried playing with the PCIe and MCP-MPP timings. With the m.2 to PCIE card I couldn't even do 101mhz on the PCIe buss as Samsung 950pro boot drive would no longer be recognized. I switched to a SATA SSD which ultimately allowed for a 110mhz on the PCIe, and 103 on the MCP-MPP. Firestrike scores went up by 300 points consistently, but not enough to get rid of the m.2 PCIe card.
So if the loose ram slot alone didn't trip me up enough, getting the m.2 to PCIe card to work again did. Even after resetting the BIOS it just wouldn't register. After too much trial and error, ultimately it was due to disabling the onboard lans. Out of habit I disable onboard devices that I don't use: serial, 3rd party SATA ports, audio... I'm not sure of the reason, but when the lan ports are disabled the board hangs after the raid sequence. I did notice that after raid is loaded there's a message about something couldn't be evoked (which if I recall was the lan). Wasted about an hour or two there. FYI for those that try using an NVME drive.
Attached are the Firestrike scores and another run of CrystalDiskMark6. CDM6 scores went up a bit in most tests. I compared my Firestrike results to Liathan's (dual 980's: https://www.overclock.net/forum/6-in...l#post23708043
). I'd say that results are comparable. The Titan Xp beats out 980SLI, but a 300mhz faster CPU weighs more at lower resolutions. Considering how bottle-necked the GPU is, I'm not surprised.
1. For this rig, more acrylic work. RGB IO cover, new cover for the Titan Xp, and make a cover for the m.2 PCIe card.
2. Try a 1080ti Amp Extreme card. I may even trade the Titan Xp for one, but would try to borrow one first.
3. Possibly track down some more X5470's, one that can do >4.2ghz
4. Still on the hunt for a Cyclone Microsystems PCIe multiplier. I found one for ~$1000 on ebay earlier in the year, but couldn't justify the price. Maybe in 10 years or so I can get one cheap enough to try out. Up to quad sli on Titan Xp's and the quad m.2 both on X16 slots... I think we could officially put this in as an example for the word "bottleneck" in the dictionary.
Also, if you were a fan of Castlevania, Symphony of the Night - try Bloodstained. End game gets too easy if you grind, but hard + new game plus is where it gets fun.