i7 920 overclocking thread

[speedy2721]

Doesn't that article talk about the CPU voltage though?

[Patch]

Originally Posted by nebuchanezzar

afaik you can permanently enable Turbo with your system. If you are running Vista or Windows 7 though you need to do one more thing in your OS. Under your control panel you will find a setting for Power Options. You need to enable the performance profile or create a custom one. Then look at the hidden options. One of them is CPU Utilization(I think thats what its called, Im at work on an XP machine atm sorry) and you have to set your minimum processor utilization and maximum processor utilization to 100%. Along with certain bios settings that allows me 21x even at idle no matter the temperatures or voltage as long as my current draw is not over 140Amps...so perma turbo mode.

Fortunately, the Bloodrage makes it even easier to have turbo always on with the following BIOS options:
1) Turbo enabled.
2) Turbo disabled.
3) Turbo always on.

With "always on", vista seems to just interpret it as a constant 21 multi (at least I've never seen it downgrade to 20 - even during prime).

I actually like Turbo as it's intended. Bump me up when it's comfortable and down when it's not. I put it "Always On" only when going for high benchmark scores. No need for 24/7.

My only point is that I've been taking stated "24/7" clocks with a grain of salt when I see a validation with a x21 multi, unless it comes with an active screenie under stress testing with active CPU-Z up. Not that it really matters since I'm not the overclock police, but it helps to interpret the data. I like to see if I can match what others have obtained, and figure out how they did it if I can't.

[stargate125645]

Originally Posted by speedy2721

Doesn't that article talk about the CPU voltage though?

The max voltages on Intel's official information agree with the 0.5V max differential with respect to the QPI votlage. The QPI (uncore) voltage is a type of CPU voltage, which is to what that article is referring. Here is another link spelling it out more expclicitly: http://i4memory.com/wp/article/327.

All this stuff was discussed over the last 5 pages of this thread, as well.

[speedy2721]

Ok thanks for the links and the info, I just didn't want to mess anything up by highering the RAM voltage over 1.65.

[laxrunner]

Originally Posted by stargate125645

The max voltages on Intel's official informatioo agree with the 0.5V max differential with respect to the QPI votlage. The uncore voltage is a type of CPU voltage, which is to what that article is referring. Here is another leak spelling it out more expclicitly: http://i4memory.com/wp/article/327.

All this stuff was discussed over the last 5 pages of this thread, as well.

See, now this is exactly why I hate the fact that the different mobo manufacturers couldn't just play nice and name their voltages consistently. On my EVGA board, it's the CPU VTT voltage rather than QPI voltage that needs to stay within 0.5V of dram. For me, CPU VTT voltage corresponds to the uncore/NB voltage and QPI is another voltage for the on chip memory controller (I think). Its sorta moot point for me as I generally keep VTT and QPI voltages pretty close to each other, but still the inconsistent nomenclature is annoying as hell.

[stargate125645]

Originally Posted by laxrunner

See, now this is exactly why I hate the fact that the different mobo manufacturers couldn't just play nice and name their voltages consistently. On my EVGA board, it's the CPU VTT voltage rather than QPI voltage that needs to stay within 0.5V of dram. For me, CPU VTT voltage corresponds to the uncore/NB voltage and QPI is another voltage for the on chip memory controller (I think). Its sorta moot point for me as I generally keep VTT and QPI voltages pretty close to each other, but still the inconsistent nomenclature is annoying as hell.

That's why I made this post: http://www.overclock.net/intel-cpus/...ml#post5879338

P.S. Wow I typed that post horribly. Someone at work must have been talking to me whilst I was typing it.

Originally Posted by speedy2721

Ok thanks for the links and the info, I just didn't want to mess anything up by highering the RAM voltage over 1.65.

No problem. Assuming you are using your XMS3 sticks, I wouldn't bother applying too much voltage to them (or increasing the VTT just to be able to increase the voltage to the DIMMs) as the XMS series in my experience are horrible overclockers so a voltage increase probably won't do you much good.

[45nm]

http://74.125.47.132/search?q=cache:...ient=firefox-a

[speedy2721]

Originally Posted by stargate125645

No problem. Assuming you are using your XMS3 sticks, I wouldn't bother applying too much voltage to them (or increasing the VTT just to be able to increase the voltage to the DIMMs) as the XMS series in my experience are horrible overclockers so a voltage increase probably won't do you much good.

Yeah I wasn't going to try to overclock them, I actually had to change my multi from 19 to 21 because my RAM was running at 1688 and it wouldn't pass LinX even if I loosened the timings alot. I have them at 1.64V but the are rated at 1.65 so I didn't want to go over by using 1.66V.

I had to higher some of my voltages since I got 6GB of RAM instead of 2, so here is what I have and if they are to high then can someone tell me what to lower.

4GHz-1.344 idle 1.328 load
CPU Multi-21
Base Clock- 191
Turbo- On
HT- On
QPI speed- 7.59GHz
RAM multi-8
RAM speed- 1566 MHz
Timings- 9-9-9-25
LLC- Enabled
CPU Vcore- 1.36825
QPI-VTT Voltage- 1.335
IOH Core- 1.3
DRAM Voltage- 1.64
CPU PLL- 1.88
QPI-PLL- 1.3
ICH I/O- 1.3
ICH- core- 1.3
DRAM Termination- Auto
PCIE voltage- Auto

[stargate125645]

Originally Posted by speedy2721

Yeah I wasn't going to try to overclock them, I actually had to change my multi from 19 to 21 because my RAM was running at 1688 and it wouldn't pass LinX even if I loosened the timings alot. I have them at 1.64V but the are rated at 1.65 so I didn't want to go over by using 1.66V.

1.66V is used often by reviewers. I don't even think my motherboard will do 1.65V (has to be even increments).

I also don't see anything wrong with the numbers you've listed but I still don't have much experience with my 920 so I'll let some of the others that do mull those over. Are your RAM subtimings all on auto? Subtimings that won't go loose enough can limit your other timings. You can use CPU-Z to get the SPD timings for your RAM to see what they are supposed to have as timings for certain frequencies.

[speedy2721]

Yeah my board won't do 1.65, only 1.64 and 1.66. I didn't want to go over 1.65 so I am using 1.64, but I guess I can use 1.66 since my QPI is 1.335.