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

post #2961 of 67492
Quote:
Originally Posted by disappearingone View Post

I'm in the same boat with Prime95. I can pass 5+ hours on IBT using all 16 gig just fine @5GHz/4.9v but I cant pass 2 test in prime with out losing a core, no mater how much I tweek or even strait up pour voltage to it. The closest thing I have hit that will pass 24 hour prime test is 4.5 @ 1.38v and 1.27500 on the cpu/nb and a slight bump to the NB.
[EDIT] I have been contributing this to my inexperience as a overclocker but maybe it is just prime...still makes me feel as though I'v failed.


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.
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post #2962 of 67492
Quote:
Originally Posted by rvaughn View Post

I keep hearing this about prime95 but I've had no problems. What MB?
prime95 gets my CPU hotter, by FAR, than any other benchmark or stress test program I regularly use. That heat has to come from somewhere -- a lot of watts are being consumed at that point. My theory is that some MBs just can't handle the load. They let the voltage droop too much when things get heavy and then you get blue screens. (or it's power supplies, or whatever the other weakest component in the system is)
You can see it go in a little cycle in prime95 - every couple of minutes there's a series of instructions that causes the temperatures to climb 4 or 5 degrees -- that's almost always when I notice instability and find out I need to adjust voltages.
I haven't used it myself, but has anybody tried toast? Especially if prime95 is killing you?
I usually use quite a bit more CPUNB volts than a lot of people I've seen posting -- from 1.4 to 1.45. Yeah, that's high, but it's what's needed to get close to 2400 MHz ram working reliably -- at least for me. AMDs overclocking guide mentioned going up to 1.45V (on air) and my MB DEFAULTS to 1.40 whenever I set it for 2400 ram, so I'm figuring it's OK. Maybe it's helped my prime95 stability?

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
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post #2963 of 67492
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?
post #2964 of 67492
Thread Starter 
Quote:
Originally Posted by FX-8320 View Post

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?

People with BD/PD fail Prime at stock. Prime is a bad stability test for these chips. IBT has a better track record, and will push them harder.
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post #2965 of 67492
Quote:
Originally Posted by FX-8320 View Post

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?
post #2966 of 67492
Thread Starter 
Quote:
Originally Posted by rvaughn View Post

Quote:
Originally Posted by FX-8320 View Post

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?

No, it means that it is not programmed to handle the Bulldozer design (EDIT: to put it better, something in the program refuses to work with the module design consistently at any clock for reasons unknown). If you can honestly pass IBT, Overdrive, gaming, and any other stability test, but prime dies in 10 seconds, then it is because Prime is a bad program for these chips.

Don't put too much weight behind any one program.
Edited by KyadCK - 11/10/12 at 10:19pm
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post #2967 of 67492
Quote:
Originally Posted by KyadCK View Post

Yay, gaming benchmark!
Today I bring you a usage bench (numbers provided by HWiNFO64) on Planetside 2.

I didn't have my GPUs in crossfire for this, but that's fine since it didn't max the CPU or GPU anyway. This is fully maxed at 1080p (would be 6020x1080, but there's a hud glitch, so I can't play that way) 60FPS vSync locked.
I didn't test it during any big battles, because there were none. I'll do that later today. This is just flying around in a Reaver, shooting at some stuff.
Most important is that cluster 2/3rds in. It uses 6 threads!

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!
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post #2968 of 67492
Quote:
Originally Posted by KyadCK View Post

People with BD/PD fail Prime at stock. ....
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.
post #2969 of 67492
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.
post #2970 of 67492
Thread Starter 
Quote:
Originally Posted by anubis44 View Post

Quote:
Originally Posted by KyadCK View Post

Yay, gaming benchmark!
Today I bring you a usage bench (numbers provided by HWiNFO64) on Planetside 2.

I didn't have my GPUs in crossfire for this, but that's fine since it didn't max the CPU or GPU anyway. This is fully maxed at 1080p (would be 6020x1080, but there's a hud glitch, so I can't play that way) 60FPS vSync locked.
I didn't test it during any big battles, because there were none. I'll do that later today. This is just flying around in a Reaver, shooting at some stuff.
Most important is that cluster 2/3rds in. It uses 6 threads!

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!

My H100's fans are intake, so the massive airflow (4 stock H100 Corsair fans at 60%) from that is all going right down onto the VRM cooler. I have not done anything to the motherboard itself, but I am also not using any FSB/NB/HT OC at all. I did add a 80mm fan because I did it to show an example and just decided to leave it since it didn't look bad, but I had the 5.0 long before then.


The board is a rev 1.1. In all honesty though, If you can get a UD7, do it. It has far superior cooling on the board, and the x16s are even farther apart.

Also, keep in mind the shear amount of voltage I'm shoving down this thing (1.536v after LLC... less then my 970BE actually tongue.gif ) and the amount of heat that makes to keep 5.0. It's not happening under 1.5v.
Quote:
Originally Posted by rvaughn View Post

Quote:
Originally Posted by KyadCK View Post

People with BD/PD fail Prime at stock. ....
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.

If multiple chips fail at stock, then it is the program. The sooner you accept that, the better off you'll be.
Quote:
Originally Posted by FX-8320 View Post

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.

Eh, like I said, don't put too much weight behind one program. In this thread, IBT has been king due to Prime's problems and IBT does push the chip even harder (and thus hotter) then Prime. Personally, I consider a full day of gaming (on each of my games) + recording + encoding + normal use stable. You'll notice I'm the one playing games with my OC rather then pulling my hair out wondering why an overrated program freezes my system. tongue.gif
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