[OFFICIAL] FX-8320/FX-8350 Vishera Owners Club - Page 297

Its weird to me too, I can pass 24hr prime95 at 4.6Ghz at 1.425v but any clocks between 4.7-4.9Ghz won't pass it at all, but I ran prime95 at 5Ghz and no problem showed up for 2hrs except the temps being too high so I stop it, unlike the 4.7 to 4.9Ghz it fails within 3mins of running it.

I'm using a CHVF that I got way back in June of last year and and running a H100 cooler, temps and droop are not my problem as Never pass the high 50's or low 60's with 1.5+volts in stress test, and I have been keeping a close eye on my Vdroop thanks to the rumor about the LLC trouble on the 404 bios chips for the CHVF. (replaced it and have seen no discernible change FYI) I do plan to one day change to a custom loop but am afraid I'll screw up and ruin my Geek Hotrod. Yeah, my trouble is one or more of the following troubles; inexperience, bad batch chip, immature Bios, P95 or to much/incompatible ram.

OCing this dude is proving to be much, much, much harder then the old Ph II's. I am learning a great deal more however and have had some fun in the process. Though now i'm just annoyed I am struggling for my goal of 4.8... As it would be a nice bump in performance over my 4Ghz 1100T where as 4.5Ghz is about the same in single thread as far as the benching I'v done tells me. 5Ghz was my goal but some benchies @ 4.8 made my decide to settle there If I could obtain that stable on about the same voltage as my Thuban.

I dont think my Chip is a dud because I can boot to windows at 1.49 or less and run IBT and Cinebench all day long.

I was leaning toward the ram (2 8gb Patriot Viper 3) till I put two 4GB sticks of my old 1866 9-10-9-28 Gskill Snipers in there and Hit the same wall for Prime. One note on the Snipers for a long time I would get an endless error loop In memtest on test 7 with these. Have 4, 4gb sticks tested them all but Asus finally got around to working on the compatibility Issue in one of the Bios updates I guess cuz they run threw fine now but I still used them because they worked fine in every other test and I had no other Issue then a endless error loop in memtest.

That leaves just a Compatibility issue with Prime,Bios or me.
Edited by disappearingone - 11/10/12 at 9:40pm

I am still thinking if it is possible to be Prime95 stable at a different speed on the same setup, then it should also be acceptable to be still Prime95 stable at your overclock, providing that it is truely stable.

Then if given the above is true, are many of these failing Prime95 overclocks actual not stable at all?

I think that prime95 is doing what I want -- stress testing. In fact, if all these other stress tests pass, but prime95 "fails", then doesn't that mean it's just doing a better job?

This is encouraging news. I'm hearing all over the web how game engines and other software are being compiled or re-compiled to work with as many cores as you've got, and it all seems to be happening at once!

Incidentally, KyadCK, I took a look at the pics of your rig and noticed you don't seem to have any special mods/cooling for your northbridge or VRMs. Did you do anything to the thermal paste/pads on your 990FX-UD3, or are they stock and running just fine as they came out of the box? I'm asking because if you're getting 5GHz out of your 8320 on that UD3 board without any VRM/NB overheating issues, I'm sold on it, and I'll go out and buy one tomorrow while they're still on sale near me.

Also, if you could tell me which revision of the 990FX-UD3 your motherboard is, that would be amazing.

Thanks!

Then by definition their system ISN'T stable. Sorry, but that's a "duh" to me.

Maybe when I hear about all the cases where prime95 passes a system, but other stress test programs cause a failure, we'll have found a problem with prime95.

I think the main issue here is many die hard overclockers have been using Prime 95 for years, and to have it suddenly fail, is in all certain fail.

Maybe there needs to be some kind of offical disclaimer (from someone that can confirm from AMD or respectable), that says these processors will fail normally with Prime 95, because until then people here are just going to keep on going by "yes my system is Prime 95 stable". if that is not really the case in any given circumstance.