Intel i5 750 Overclocking Advice/Help

[slekkas]

Turn LLC on and use the 21 multiplier! 21 x 191. Set your vcore to 1.4 in the bios and you should be good to go. Also, try prime 95 as well. Post back with what you find out

Just tried that. PC froze after 40sec in the test. What VTT should i use?

Are you still using Bios F5c or have you updated to F5?

 

[big4x4]

Using the F5c bios....I can send it to you if you want. My vtt is set at 1.19 in the bios. Definitely try to reflash because I had to do so twice to get mine to work well.

 

[slekkas]

Using the F5c bios....I can send it to you if you want. My vtt is set at 1.9 in the bios. Definitely try to reflash because I had to do so twice to get mine to work well.

Are you sure VTT 1.9. You are not mistaking it with PLL?

 

[big4x4]

Yes, talking about vtt....actually just realized it was a typo...should be 1.19v

 

[slekkas]

No luck my friend. I got to go to bed. It's 4am here and I'm very tired and disapointed. If you have some ideas wile I'm at sleep feel free to post them. Thank you for you help and for trying.

 

[big4x4]

I would say the issue lies in your psu or the motherboard itself. I don't have any fluctuation in voltages under load. I would suggest using the f5c bios I have since I know 100% that it works. Have you tried a lower oc.....does it still drop the volts that low?

 

[spinejam]

marked for interest! 🙂

 

[bob5568]

Turn LLC on and use the 21 multiplier! 21 x 191. Set your vcore to 1.4 in the bios and you should be good to go. Also, try prime 95 as well. Post back with what you find out

You realize that by turning ON LLC, you are removing your safety margin against transient spikes. I would never do that while setting vcore at a high level (I think of 1.4 as pretty high).

 

[Kenmitch]

For the ultra paranoid guys I decided to play around within the paranoid zone I like to call it.

The chip was stable @4ghz with a vcore of 1.325 and cpu vtt of 1.18

The chip looks like it'll be stable @4.1ghz with a vcore of 1.360 and cpu vtt of 1.21-1.22

Please vote in my poll in this forum 🙂

http://forums.anandtech.com/showthread.php?t=2050130

 

[mugshot]

Hi all,

Currently i am testing my new rig
testing i5 750 @4.4ghz (21x210)
vcore 1.30
vtt 1.150

turbo boost is significantly lowering my vcore
back reading through the thread i am comparing configuration and resuts with mine
is turbo boost the real deal?
or am i missing something?

i have yet to do a stability test at 4.4ghz

i5 750@3.61 ghz (21x172)

vcore 1.1v
vt 1.150v
pll 1.80v

prime95 stable at 5.5 hours

 

[spinejam]

[B][FONT=Courier New][SIZE=1]BCLK:           200[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]PCI-e Freq.     100[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]Spread Spect.   Disabled[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]CPU Ratio:      20[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]CPU vCore:      1.40[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]VTT:            1.264[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]PLL:            1.853[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]PCH:            1.079[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]QPI Freq.       6.400GT[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]DRAM            1600Mhz // 8 8 8 24 1T // vdimm = Auto[/SIZE][/FONT][/B]
[B][FONT=Courier New][SIZE=1]vDrop           w/o vDrop[/SIZE][/FONT][/B]