Can't OC past 3.08ghz i7 920?

[Oroborus]

Hi I'll list my hardware and current speeds and then I'll move onto my problem =D...

CPU: Intel Core i7 920 @3.08
Mobo: Asus P6T Deluxe V2
RAM: Patriot PVT36G1600LLK 6GB @1543mhz
Graphics: Asus Radeon HD 5850
PSU: Enermax Revolution85+ 1050 Watt.

Okay so, at the moment, with these settings I have everything in the BIOS set to default except the BCLK is at 154 and the ratio for the DRAM FSB is 2:10. These setting work fine, I have had no troubles at these speeds.
Last night I tried to overclock a little further, bring it up to 3.2ghz, so I changed the BCLK to 160, vcore to 1.25v, and DRAM voltage to 1.65v, leaving the RAM ratio at 2:10... Wouldn't boot. From what I know and have seen this isn't really that much of an overclock? Is there something I am doing wrong, I'd love to hear some feedback.

 

[coco16]

i think is your ram try to get your ram to lower speed and you will see results truth me

 

[Oroborus]

You think? The RAM is rated at 1600mhz... 8-8-8-24

 

[MIAHALLEN]

Check out my guide here:

http://www.overclockers.com/3-step-guide-overclock-core-i3-i5-i7/

Sounds like not enough VTT voltage

 

[Oroborus]

So you'd recommend something like 1.3v?

 

[Oroborus]

Hmm... The BIOS doesn't have a "VTT" setting, the only things I can see relating to the CPU voltages are: CPU Voltage and CPU PLL Voltage.

 

[redduc900]

VTT = QPI/DRAM Core Voltage

 

[Oroborus]

Ah! Champion! What would be a good recommendation?

 

[Oroborus]

I did read your guide MIAHALLEN, and I read about increasing the VTT +0.2v but I don't know what the default is? In the P6T Deluxe BIOS it just says "Auto"... That's why I am asking for a recommendation.

 

[redduc900]

Give these settings a try...

Ai Overclock Tuner: Manual
Intel Speed Step Tech: Disabled
Intel Turbo Tech: Disabled
CPU Ratio: Auto
BCLK Frequency: 190MHz
PCIE Frequency: 100MHz
DRAM Frequency: DDR3-1523MHz
UCLK Frequency: Auto
QPI Link Data Rate: Auto

CPU Voltage: 1.25
CPU PLL Voltage: 1.80
QPI/DRAM Core Voltage: 1.25
DRAM Bus Voltage: 1.64
CPU Differential Amplitude: 800mV

... all other voltages on Auto, and leave the RAM timings at 8-8-8-24 (all sub-timings on AUTO).

 

[Oroborus]

Thanks, I'll give it a go and I'll let you know.

 

[Oroborus]

Wow, that worked, I'll run Prime95 in a sec... Would it be a bad idea to enable Intel Speed Step Tech and Turbo Tech?

 

[MIAHALLEN]

I did read your guide MIAHALLEN, and I read about increasing the VTT +0.2v but I don't know what the default is? In the P6T Deluxe BIOS it just says "Auto"... That's why I am asking for a recommendation.

default is 1.15V

 

[redduc900]

Just leave them both disabled for the time being, as you're still trying to find the max. stable overclock.

 

[Oroborus]

Seems to be stable, ran prime95 for 5 mins... What are acceptable temps?

 

[Oroborus]

Thanks to you Miahallen and redduc for getting me started on this, a big help.

 

[redduc900]

Running Prime for only 5 min. isn't really a sign of stability. Let it run for at the very least an hour on blend, and monitor Tjunction (Core temperature) w/ either Core Temp or Real Temp. Depending on the HSF you're using, and how much Vcore your chip needs to be Prime stable at a given clock, shoot for max. core temp's in the 72 - 73C range.

 

[Oroborus]

Yeah, thanks for the tips! The cooler I'm using is the H50, but as you may assume it doesn't run to well in the RAVEN RV01 so in a couple of days I'm getting a TRUE, I'll push it further then.

 

[MIAHALLEN]

Thanks to you Miahallen and redduc for getting me started on this, a big help.

You're welcome...glad to help

Running Prime for only 5 min. isn't really a sign of stability. Let it run for at the very least an hour on blend, and monitor Tjunction (Core temperature) w/ either Core Temp or Real Temp. Depending on the HSF you're using, and how much Vcore your chip needs to be Prime stable at a given clock, shoot for max. core temp's in the 72 - 73C range.

I think he was following my guide where I suggest 5 minutes runs for finding a general range. After finding a general idea with short runs, the guide suggests backing off a bit and running for an hour to find basic stability......He's on the right track