i7 920 overclocking thread

[stargate125645]

Originally Posted by Jakethesnake011

Monitor with RealTemp: http://www.techpowerup.com/realtemp/
And Core Temp: http://www.alcpu.com/CoreTemp/
watch CPU temperatures you do not want them to get too hot.

Speaking of temperatures, having a Tj_max of 100 degrees C seems way too high. When I use Core Temp, I load at 50 degrees C with 1.28V (auto settings; I do not intend to run it this high at stock speeds) and idle at 30 degrees C for its auto-detected Tj_max of 100 degrees C. How are those temperatures in relation to what they should be for stock at my voltage? How high can you put the temperature and voltage on these guys (like I said, 100 degrees C seems way too high)? Ambient is around 22 degrees C for me for what it's worth.

I scanned through the first few pages and did not see any mention of "guidelines," and reading the articles linked in the first post did not give me any voltage or temperature limits, so that is why I am asking.

[Extreme Newbie]

Originally Posted by stargate125645

I scanned through the first few pages and did not see any mention of "guidelines," and reading the articles linked in the first post did not give me any voltage or temperature limits, so that is why I am asking.

I think this is what you are looking for:
http://www.overclock.net/intel-cpus/...hread-120.html

[45nm]

I'm running my i7 965 @ 3.8 currently and my PC Probe II is setting off alarms because I was running Vantage and the cpu was at 65c under load. What is the 'safe' temperature for the i7 cpu's ?.

[PizzaMan]

Originally Posted by Extreme Newbie

I think this is what you are looking for:
http://www.overclock.net/intel-cpus/...hread-120.html

Little bit more info here:
http://www.overclock.net/intel-cpus/...ml#post5821507


I'm still in ahh over these specs for i7. 1.55v is what the data sheet says, but geeez, with the temps you guys are getting at ~1.39v. Makes 1.55v seem crazy without extreme cooling.


Read this post for my currant thoughts on these limitations:
http://www.overclock.net/intel-cpus/...ml#post5821507

[Extreme Newbie]

Originally Posted by 45nm

I'm running my i7 965 @ 3.8 currently and my PC Probe II is setting off alarms because I was running Vantage and the cpu was at 65c under load. What is the 'safe' temperature for the i7 cpu's ?.

Max temp is stated to be 100c so if you can stay between 70c and 80c (Under full load) you should be fine.
You can adjust the various threshold settings in PC Probe to stop alarms from going of when you reach 65c.

[speedy2721]

Is it normal for it to require more core voltage when you get more RAM. Before I was stable at 19x211 when I had 2GB of DDR3 1336, but when I got 6GB of DDR3 1600 RAM, it wasn't stable anymore. I had to make it 211x191 to make it stable and make my CPU voltage from 1.312V load to 1.328 load.

Could it be because I turned my RAM multiplier from 6 to 8 which made my RAM run at 1688 and with the 211x191 it is running around 1550?

[Patch]

I'm hitting a very hard wall.

Base clock of 220 Mhz.

Period.

With tinkering I'm getting various settings more and more stable at 219-220 Mhz bclock, but it won't go past. Even lowering the multi down to 12. Vcore of 1.45 is fine for 220X21 (turbo on) to get some benching at 4.6Ghz, but I can't even get through early post with a higher baseclock - even with 1.55 Vc. Can't even get far enough for an error screen.

I'm on water and have yet to even see my core temps higher than 80C.

Once, I got into Windows for a quick validation at 221 bclock for 4.64 Ghz.

Is ANYBODY getting a base clock higher than 220 on their 920? Even with extreme cooling?

I'm thinking 4.64 ghz will my chip's absolute limit. Though I'm not complaining

[laxrunner]

Anything above about 217 takes work. The highest I've ever gotten mine is right at 222, but it was in no way stable and gave BSOD instantly if I tried going to even 222.5. I've seen higher a couple times, but if I recall correctly those were at ~1.9V to the ram and 1.6V or so on the QPI and NB. Not sure what the Vcore was but those voltages are a lot more than you want to be pushing on a regular basis unless you have cash to low on new parts all the time.

[stargate125645]

Originally Posted by Extreme Newbie

I think this is what you are looking for:
http://www.overclock.net/intel-cpus/...hread-120.html

Yeah, that would have sucked looking for. From reading the fine print on the table, I'm not so sure that 1.55V can be used diretly. It is explained in the footnotes as a voltage difference to Vss, so I'd need to know the Vss limits. What is needed is a nice table of all the voltages that may need to be changed, and their safe operating limits. Any suggestions to that end?

You guys have been running core temperatures in the 70s and 80s under full load without any problem? What are your idle core temperatures?

[Extreme Newbie]

Originally Posted by stargate125645

Yeah, that would have sucked looking for. From reading the fine print on the table, I'm not so sure that 1.55V can be used diretly. It is explained in the footnotes as a voltage difference to Vss, so I'd need to know the Vss limits. What is needed is a nice table of all the voltages that may need to be changed, and their safe operating limits.

You guys have been running core temperatures in the 70s and 80s under full load without any problem? What are your idle core temperatures?

I think the jury is still out on what is the "safe" 24/7 cpu voltage. Heat seems to be more of the issue than voltage for me.
At 3.9Ghz (20x195) I use only 1.225v CPU with QPI at 1.2375v. Even with these low voltages my idle temps are 35c-39c and load reached 68c-72c. At 4.0Ghz (21x191) the temps hit 80c so the extra .1 Ghz doesn't seem to be worth it. Once I go with water cooling I will push the chip a bit more.