Need help with OC settings

[morrowmedia]

I was able to run @ 4.0GHz for 3 hours as the attached picture suggest. I am not sure what else I can change around to keep the same core from failing out. Please let me know if there is any incite someone can provide me to guide me during this process.

Thank you very much,

Zach

 

[Thorsen]

Intel® Core™ i5 Processor I5-750 - SLBLC

I thnk you are hitting the volatge range for the chip, so be careful on pressing it. I know you got that error previous to upping the voltage, but I wouldn't press it.

Here is another good description of OCing the i5-750 : Feature - Overclocking Intel's Core i5 750 | bit-tech.net

If you increase your voltage your gonna start seeing increased temps. If you are on a stock cooler HSF then I would not go higher and as the article above states, 1.45-150 is needed to get more at 200mhz base clock.

Another concern is the error on the worker #3
The third core in your screenshot Worker #3 had the same issue in your last thread. I think there is a way to disable cores for testing, but haven't done it. I think this is in the BIOS. you might have a CPU that unfortunately is hitting a wall on that 3rd core. none of the other ones are showing errors right?

 

[morrowmedia]

That is correct, none of the other cores are showing errors. Just that one. I am using a corsair H50 with 2 fans for push/pull air flow in a Corsair 800D case. So I have plenty of air flow and the cores are reaching a max of 74c and the core that failed after 3 hrs reaches only 70c max. So it cant be a temp issue...I was just wondering if there was any other setting i might be over looking in the bios that would help me obtain the 4ghz speed I desire. If not its no big deal..3.8GHz is plenty fast...4.0GHz is just for my own selfish desire.

Zach

 

[Thorsen]

Well as your avatar says "Play Hard" Just at least wear a cup....

Note: I meant wear a cup metaphorically. (I know this isnt a metaphor but whatever.)

 

[Fumz]

... the cores are reaching a max of 74c and the core that failed after 3 hrs reaches only 70c max. So it cant be a temp issue...

It just might be. 72C is max.

It's possible you just got an unfriendly chip? However, 3.8GHz isn't half bad.

 

[morrowmedia]

Yea, I'm going to stick with 3.8 for now. If money was no option, what chip/mobo should I get if I want to run a fast setup?

 

[Thorsen]

If money is no option look into a SSD for your OS!

 

[Lordbob75]

1.4 volts is on the top end of safe voltage ranges. If you can, take it down.

Your failed test is because it is not stable that high. It has to come down.

~Lordbob

 

[morrowmedia]

1.4 volts is on the top end of safe voltage ranges. If you can, take it down.

Your failed test is because it is not stable that high. It has to come down.

~Lordbob

It was failing after 5 minutes prior to me bumping up the volts. I feel like there may be a setting somewhere I could change...but I'll just be content with a 3.8GHz overclock for now.

Zach

 

[Thorsen]

You can try taking off all OC and run Primetest to see if that third core still fails.

If that third core fails under normal conditions, then its not the OC causing the issue and you might be able to return the chip.

 

[smarteyeball]

Yep, if it fails @ stock speeds, or after being re-seated etc - it could simply be just a dud chip.

 

[chev65]

If you want to get past that 384K test you should run the custom test in prime blend which will allow you to run just the 384K test that you are failing rather then running it over 4 hours to get to that point again. Failing the 384K test usually relates to a low Vcore or CPUvtt. After that your other cores were failing the 320K test which is one of the hardest tests to pass in Prime Blend. There isn't much of a reason to run Prime blend past 10 hours because the entire test repeats itself at that point.

 

[morrowmedia]

If you want to get past that 384K test you should run the custom test in prime blend which will allow you to run just the 384K test that you are failing rather then running it over 4 hours to get to that point again. Failing the 384K test usually relates to a low Vcore or CPUvtt. After that your other cores were failing the 320K test which is one of the hardest tests to pass in Prime Blend. There isn't much of a reason to run Prime blend past 10 hours because the entire test repeats itself at that point.

That's just it Chev...I run it at 3.8GHz OC and it test fine, its when I go up to 4.0GHz that it fails, and the max temp only goes up a couple degrees (68c @ 3.8GHz and 70c @ 4.0GHz) I'm using the Corsair H50 with push/pull and I have the Corsair 800D case so the inside stays relatively cool. I brought my vcore up to the thresh hold to get the 4.0GHz to run longer than 2 minutes, what should i change the CPUvtt to?

Zach

 

[archie123]

you mean its 1.4 in the bios? whats the voltage under load in windows?

whats your fsb at?

70 degrees is pushing it intel states the max safe operating temp as 72.2

I really struggled to get my friends i5 past 3.8 , i gave up in the end

 

[chev65]

If you want to get past that 384K test you should run the custom test in prime blend which will allow you to run just the 384K test that you are failing rather then running it over 4 hours to get to that point again. Failing the 384K test usually relates to a low Vcore or CPUvtt. After that your other cores were failing the 320K test which is one of the hardest tests to pass in Prime Blend. There isn't much of a reason to run Prime blend past 10 hours because the entire test repeats itself at that point.

That's just it Chev...I run it at 3.8GHz OC and it test fine, its when I go up to 4.0GHz that it fails, and the max temp only goes up a couple degrees (68c @ 3.8GHz and 70c @ 4.0GHz) I'm using the Corsair H50 with push/pull and I have the Corsair 800D case so the inside stays relatively cool. I brought my vcore up to the thresh hold to get the 4.0GHz to run longer than 2 minutes, what should i change the CPUvtt to?

Zach

At a certain point you will need to increase CPUvtt but you should not raise it more than .5 above DIMM voltage. There are other important voltages that may need adjustments also like QPI-PLL Vcore, ICH Vcore, IOH Vcore, and a few others are important. You should probably use the overclocking guide in the link below if you want to go further with your overclock. Second link is for memory speed.

How to Overclock the I7 (Ported)

Memory Frequency Guide

 

[morrowmedia]

I'm debating just going with an i7 1366 setup and taking this mobo/cpu out and using it at home for a media center. Seems the i7's like OC a bit more than the i5, plus I like the thought of HT. the system runs great at 3.8 so I am going to keep it there for now..its only 200MHz difference and i'm running raid0, so i'm going to stop being selfish and just chill. Thank you all so much for your help. I love this forum and the supporters on it!

Zach

 

[madtownidiot]

4 GHz is a bit extreme for that chip.. if you got it to work for 4 hours, you're doing better than most. If you have enough to buy a faster CPU, I would take the advice given earlier in this thread and get an SSD instead. Doesn't matter what the numbers say, the HDD is ALWAYS a bottleneck in your system.