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post #1091 of 6491
I barely hit 60*c folding on a 4.75 oc with 1.40 vcore
post #1092 of 6491
What does everybody think of this?



4.3ghz with 100mhz bclock, memory at 2133mhz. Memory voltage set to 1.5v, IMC set to -.005v offset (so just the smallest smidge below stock); all other values forced to stock voltages (couldn't do the IMC without an offset). The only voltage that truly isn't stock is the CPU, which has a -.080v offset (so considerably lower than stock). Although I guess the offset may get screwed up by turbo mode voltage (I had to give it a .004v offset as it wouldn't take zero for an answer). So net is a -.076v offset under load, with a -.080v offset at idle.

I had the offset as low as .090v, and it ran Prime95 fine for about a half an hour with a game of tribes ascend at -.090v but locked up. So far it's been running P95 with a game of tribes pretty well at -.080v, but I quit that after about a half an hour.

Right now I'm running P95 + two instances of MSI kombustor, again with a -.080v offset. I'm pretty pleased considering the chip is only drawing 1.168v. That's only after it's been running prime for at least 5 minutes too. Normally the voltage under full load fluctuates between 1.16 and 1.168v. Idle voltages go as low as .089 ish, and normally in the .09-1.1 range depending on how many cpu cycles windows decides to waste.

Power consumption at -.080 and -.090 was pretty much the same. Power consumption has dropped by around 20 watts both at load and at idle since undervolting from 1.24v though. The 1.24 was with an offset of +.005v and a turbo offset of +.004v. Temps have dropped too, to the tune of about 3-4C under load for the first hour or so, and 2-3C for all subsequent time periods. The temperature disparity between cores 1 and 2 is also smaller (cores 2-4 were always within a degree or two of each other). Now there is only around a 1-2 degree disparity between all cores.



I wish I could set the chip with a normal, non negative offset and get the strap at 125mhz. It won't post that way, but it posted just fine at a constant 1.26v. I didn't bother to run prime on it though as that extra 20 watts of energy consumption probably isn't worth the trouble for gaming with a single mid range GPU (or possibly even a pair of high range gpus).

EDITED to add:
No LLC of any kind.
Edited by SavantStrike - 7/25/12 at 3:00pm
post #1093 of 6491
Quote:
Originally Posted by kizwan View Post

I got a chance running IBT today. Ambient 31C. Please comment on the GFlops score.

I forgot to run CPU-Z the first time.
Looks about right. thumb.gif
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post #1094 of 6491
Quote:
Originally Posted by Amdkillsintel View Post

Looks about right. thumb.gif


~1.39v at 4.5ghz? It should be possible to drop bclk down to 100 and move the strap up yielding 4.625 ghz at that voltage I would think.


Also, as an update, prime just spit out an error with the -.080v. I'm down at -.070v and so far so good, temps are also still very respectable.
post #1095 of 6491
Quote:
Originally Posted by SavantStrike View Post

What does everybody think of this? Warning: Spoiler! (Click to show)

4.3ghz with 100mhz bclock, memory at 2133mhz. Memory voltage set to 1.5v, IMC set to -.005v offset (so just the smallest smidge below stock); all other values forced to stock voltages (couldn't do the IMC without an offset). The only voltage that truly isn't stock is the CPU, which has a -.080v offset (so considerably lower than stock). Although I guess the offset may get screwed up by turbo mode voltage (I had to give it a .004v offset as it wouldn't take zero for an answer). So net is a -.076v offset under load, with a -.080v offset at idle.
I had the offset as low as .090v, and it ran Prime95 fine for about a half an hour with a game of tribes ascend at -.090v but locked up. So far it's been running P95 with a game of tribes pretty well at -.080v, but I quit that after about a half an hour.
Right now I'm running P95 + two instances of MSI kombustor, again with a -.080v offset. I'm pretty pleased considering the chip is only drawing 1.168v. That's only after it's been running prime for at least 5 minutes too. Normally the voltage under full load fluctuates between 1.16 and 1.168v. Idle voltages go as low as .089 ish, and normally in the .09-1.1 range depending on how many cpu cycles windows decides to waste.
Power consumption at -.080 and -.090 was pretty much the same. Power consumption has dropped by around 20 watts both at load and at idle since undervolting from 1.24v though. The 1.24 was with an offset of +.005v and a turbo offset of +.004v. Temps have dropped too, to the tune of about 3-4C under load for the first hour or so, and 2-3C for all subsequent time periods. The temperature disparity between cores 1 and 2 is also smaller (cores 2-4 were always within a degree or two of each other). Now there is only around a 1-2 degree disparity between all cores.
I wish I could set the chip with a normal, non negative offset and get the strap at 125mhz. It won't post that way, but it posted just fine at a constant 1.26v. I didn't bother to run prime on it though as that extra 20 watts of energy consumption probably isn't worth the trouble for gaming with a single mid range GPU (or possibly even a pair of high range gpus).
EDITED to add:
No LLC of any kind.
Please check whether you have WHEA errors or not. (Event Viewer >> Applications and Service Logs >> Microsoft >> Windows >> Kernel-WHEA >> Errors)
Quote:
Originally Posted by Amdkillsintel View Post

Looks about right. thumb.gif
Thanks. smile.gif I'm getting XSPC Raystorm EX240 water cooling kit. I wonder how much temp will drop with it. If it can drop at least 3C to 4C, I'm already happy.
Edited by kizwan - 7/25/12 at 10:42pm
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post #1096 of 6491
Quote:
Ram settings are finicky with this board/chip. Use XMP and make sure that you bump the RAM voltage up a notch if you're using GSkill.

Yeah... This lol...

This setup I have is by far the most finicky animal I have ever had to tend to while overclocking. For the first time in two weeks I have finally been stable.
I was trying 105x43 and 1724 cl 9, and could not get it stable. I could not get stable at 125x37 and 1666 cl9. I could run all night prime stable using 14400mb of ram, but could not get into bf3, and would occasionally get gray screen freezes. Even though these ram clocks are well below stock operating speeds, a small voltage bump seems to have made a difference. At 1.515v I seem to be stable up to 1970 and cl10. An extreme llc setting also seemed to help with keeping the cpu stable with a + offset, so I can still use the power saving features. Maybe I can finally get around to posting some screens instead of fighting to keep stable.

thumb.gif
post #1097 of 6491
Quote:
Originally Posted by kizwan View Post

Please check whether you have WHEA errors or not. (Event Viewer >> Applications and Service Logs >> Microsoft >> Windows >> Kernel-WHEA >> Errors)
Thanks. smile.gif I'm getting XSPC Raystorm EX240 water cooling kit. I wonder how much temp will drop with it. If it can drop at least 3C to 4C, I'm already happy.


I've never been able to decipher the event logs, but yes I have errors. I've had them since before I undervolted the chip, an average of about 1 a day, although I had a whole ton of them yesterday, probably when I had it at -.080v. At -.070v, prime ran stable for 10 hours overnight with max memory and MSI kombustor loaded (although to be fair I underclocked the living daylights out of my GPU for that simply to keep away from a constant 600W load on a 750W power supply all night). Still though, the ram and CPU were maxed out and the PCI express bus was seeing some traffic. I didn't see any real difference in power consumption between .060 and .070 though, so perhaps I should just set it to -.060 for peace of mind. In fact preliminary testing showed that temps might actually have been a degree better at .070 than .080.


Should I be terribly concerned about these errors, or is Prime enough of a determining factor?


EDIT: I either already set the bios to -.060 this morning, or I ran it last night at that setting. Today was just one of those days and I forgot already redface.gif. But with .010 volts one way or another, I don't really care. I set for -.050 and called it a day. I still say that's impressive for a chip that's got a 33 percent OC on the ram and a 10 percent OC on the cores. Intel knocked this one out of the park. The power draw looks to be around 5 watts higher at .050, but that's a rough guestimate based upon my (mostly accurate) imitation kill-a-watt. I've got a lot of crap in this system hard drive wise and my idle power consumption is never going to be fantastic.


I'm going to re run prime overnight with .050v to see if the temps change at all. Still though, should I be worried about these windows events?
Edited by SavantStrike - 7/26/12 at 7:43pm
post #1098 of 6491
They are hardware errors. I'd be concern if I have them. I don't have them either when at stock or overclocked.
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post #1099 of 6491
Quote:
Originally Posted by kizwan View Post

They are hardware errors. I'd be concern if I have them. I don't have them either when at stock or overclocked.


Any way to nail down which hardware? I've got a finicky raid card in this system too.

EDIT: I should probably add to further muddy the water, there are two columns. One is simply "Errors" which is at zero, and the other is "Operational" which does have errors. Furthermore, they appear to happen every time the system boots, but not in between, hence the large cluster when I was changing vcore offsets.


I did have a BSOD today, so I just said the heck with it and set the chip and IMC to take an extra .005v since that's as close to stock I can get without lowering the voltages. Even still though I get errors at start up, and start up does take a long freaking time. In Linux too. I feel like my boot loader may have gotten jacked some how, but I really don't want to have to do a reinstall, it's very time consuming with all of the files I have.

Double Edit:
Boy is my face red. You said Errors, not operational in your original post. Also, even under operational it appears there are 4 sources. I went into device manager and it appears I didn't install the intel INF update on this install. That may or may not have helped me. Elsewhere in the regular system logs I've been able to nail down the error as \device\raidport0. My raid card is fine, so this is most likely just a driver issue. Specifically, it appears that the error has to do with the card not relinquishing control of the PCIE bus, most likely due to a disk issue. My controller management panel says the drives are all green though, so I should be good. This particular error only happened once, but there is a good chance it's the same problem that the system reports every time it starts up, and why it takes so dang long.
Edited by SavantStrike - 7/27/12 at 4:39pm
post #1100 of 6491
Hi Guys, what agreat thread, Had a board for a while siting here on a shelf somehow could'nt justify a 3930k to play with. so after reading the thread ordered a 3820, arrived last night and an installation under water, installed windows nice.
So after an hour thought about overclocking,
Had already read how some guys have it easy and some really struggle, well iI thought lets just change the strap, 125bclk and see if she boots,

answer yes, and heres the proof,

WIll be working on it over the next week or so to see exactly what this chip will give up, thanks

ps thats Wprime 1024 running with temps around 50c under water, have a ssingle stage and Ln2 itching to get on her

3820first.png
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