[RESOLVED] Need some help on overclocking an i5 750

Anusha

Anusha

New Member
#1
I need some help on voltages and clock speeds.

I currently have mine running at 3.8GHz (190x20) with Vcore @1.24375V, VTT @ 1.170V. RAM also overclocked from 1333 to 1520 9/9/9/24 1.5V. Power saving features are all enabled. Turbo is disabled. These settings are perfectly stable. I can run Intel Burn Test (IBT) for hours without getting an error.

Like anyone else, I want to push it further (4GHz is such a awesome figure to reach even though it is only a 200MHz uip). Heck, I'm only at 65C in IBT so I have more headroom, right?

But the thing is, I cannot get it to work any faster. When I try 200x20, it would not boot because I guess the VTT is not enough. So I increased VTT from 1.170V to 1.250V, but I set it at 200x19 this time. Same clock as before, but higher VTT. I also lowered the RAM to 1200 (x6 multiplier) to rule it out as a cause of instability.

But when I ran IBT with the new settings, it would fail in the second run. The first value and the second value are different from each other.

What gives? What should I do to make it to 4GHz? Previously I have tried everything up to 1.4V on the Vcore and settings everything else to AUTO, but couldn't run it at 4GHz stably.

How should I proceed from hereon? Any help is much appreciated.

P.S.
I can however enable 21x multiplier, but then I would have to disable power saving options. I don't know if it is this motherboard, or how things just are, but I don't want to lose the power saving features. If I cannot push any further without disabling power saving options, so be it!
 
P

Perce

New Member
#2
You can take a look at this site, http://www.bit-tech.net/hardware/cpus/2009/09/21/overclocking-intel-s-core-i5-750/1 , good overclock drive-thru for Overclocking the I5 750. It should help. I noticed you did not mention Cooling or Motherboard Make/Model, more info would be helpful. Also, Make and Model of Memory? That site I posted above, carefully read the section about "not-needed" devices, shutting them off helps, makes the "thru-put" more stable. Post back with the Motherboard, type of CPU Cooling? and Memory type, I can give you more ideas then .
 
Anusha

Anusha

New Member
#3
You can take a look at this site, http://www.bit-tech.net/hardware/cpus/2009/09/21/overclocking-intel-s-core-i5-750/1 , good overclock drive-thru for Overclocking the I5 750. It should help. I noticed you did not mention Cooling or Motherboard Make/Model, more info would be helpful. Also, Make and Model of Memory? That site I posted above, carefully read the section about "not-needed" devices, shutting them off helps, makes the "thru-put" more stable. Post back with the Motherboard, type of CPU Cooling? and Memory type, I can give you more ideas then .
oops sorry i forgot that the signature can be turned off. everything is there.

mobo: Gigabyte GA-P55A-UD3
cooler: Thermalright MUX-120 with dual Enermax T.B. Silence fans in Push-Pull

Here's the current status. (I just ran it to take a screenshot, otherwise it is stable for hours)
 
Anusha

Anusha

New Member
#5
Anusha, check this site out, http://hardforum.com/showthread.php?t=1503680 ,it shows the CPUZ, specs on that board, Clock speeds for CPU, Memory timings, etc. If you don't have CPUZ installed, go here and download it, http://www.cpuid.com/softwares/cpu-z.html .

You may have and issue with you Memory, if it's DDR3 1333, trying to reach 4ghz on the Overclock may be a problem. You might have to upgrae to DDR3 1600 Memory.
Yes, RAM @1600 could be a problem but even at 1200mhz I have stability issues. I tried further and it seems even at vcore 1.35v, things are not stable. I gave up. That takes temp past 75c. It seems that extra 200mhz is not worth it. I gave up. Thanks for the input.
 

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