HELP! i5-760 Trying to break 4.1 Ghz w/o LLC

Ryanrenesis

Member
Nov 10, 2014
156
1
0
Good afternoon Anandtech, a forum I'm aware is known for its professionals and experienced enthusiasts!

I registered here at this pro-community just to ask this particular question:

Is it safe to run my i5-760 higher than 1.4V at idle? (Perhaps Vcore at 1.45V? So at load, Vcore will be 1.4V.)

I understand Intel recommends max voltage of 1.4V for the i5-760. However the problem I'm having is Vdroop: under load my Vcore is only 1.344V (1.4V at idle) and that is not enough to maintain stability at 4.1Ghz. I'm almost certain I can gain stability if I up to voltage so at load it will be 1.4V. Maybe I can even push 4.2Ghz.

*I do not have Load Line Calibration or VTT adjustments on my motherboard, so that's not an option (unless I can flash custom bios to enable LLC and/or VTT? Is it a software limitation or a hardware limitation?)

Are there any instances where people fried their 1st Gen i5 CPU by running higher than 1.4V Vcore?

I have not tried it yet as I don't want to burn my CPU, so I'm asking Anandtech pros and experienced enthusiasts alike what I should do.

Additional Info:
Motherboard: MSI P55-CD53
- C-State & C1E disabled
- PLL @ 1.81V
- PCH @ 1.05V
- CPU Amplitude Control @ 1000mV
CPU: i5-760 currently @ 4048Mhz with 1.344V at load, 1.4V at idle
- 184 Blk X 22 Multiplier (Blk @ 185 crashes Prime95 at current voltage settings, trying to get Blk @ 186)
- Max core temp at Prime95 load: 70C
- Average core temp at Prime95 load: 68.25C
Cooler: Hyper 212+ in Push/Pull w/ NT-H1 compound
GPU: EVGA GTX 780 ACX @ 1202Mhz Core/3251Mhz VRAM @ 1.21V
Power Supply: PC Power & Cooling Silencer MkII 750W Silver Certified
RAM: 4+4Gb Patriot Xtreme 1.65V 1866 & 4+4Gb Kingston HyperX 1.5V 1866 both at 9-11-9-27 timing & 1.5V
- Separate question: can the two channels be timed differently and still be stable/faster? The HyperX is rated for a lower timing but I matched it with the Patriot timings for safety)

Any help would be greatly appreciated! Thanks :)
 
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thesupergeek

Junior Member
Dec 31, 2014
6
0
0
You are more likely to fry your CPU with more voltage, and 1.4v is pushing it, but if the extra speed is really necessary, you can run it it that. Just remember, you are taking a little bit of a risk. 1.5v is where it really starts to get sketchy though.

I had a first gen i7 running at 1.48v for a while, and it was ok.
 

Flapdrol1337

Golden Member
May 21, 2014
1,677
93
91
I had the same situation with my i5 750, kind of had to use LLC to get to 4.2

I ended up running at 4.0 (200x20), no LLC, C1 power state enabled, because without C1 my pc already became noisy when playing video or other low load situations.

With LLC I got 200x21 stable though, did some gaming with it, had to turn off C1 to get the (turbo) 21 multiplier, with C1 on it'll do 24 multi on singlethreaded stuff.
 
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Techhog

Platinum Member
Sep 11, 2013
2,834
2
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If you're looking forward to replacing your fried CPU ad motherboard in 6 months, that's just fine. Otherwise, you might want to accept that you've hit the limit.