Intel 860 with Intel Turbo Boost on GA-P55-UD5

[Chrono Detector]

Ok, I have a slight problem here.

I have a GA-P55-UD5 and a Intel Core i7, and when I enable Intel Turbo Boost at 1600Mhz on my RAM it will only run at 2.9Ghz only, but if I run my RAM at 1333Mhz it will run at the correct speed. Why is that?

I paid for 1600Mhz RAM and I feel ripped off that I must sacrifice my CPU speed if I allow it to run at its full potential, and I sure didn't pay that extra money if I allowed it to run at 1333Mhz.

[C3D76]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

That's strange, is the ram multi + voltage the only thing you changed?

You might need to add QPI/VTT voltage to the memory controller. This is usually requiered to run the RAM faster/tighter, but normally only affects stability.

This is really a shot in the dark, as I have never seen RAM multi affect turbo mode (on my X58 at least). Maybe it's an early BIOS issue? Maybe that's how these new CPU's "react" to low voltage?
Hopefully someone with the same setup as you will give you the answer, and you should probably also fill out a template with your settings to make things easier....

[wazza300]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

you have to raise the bclk to achive full 1600mhz ram speed as it maxing out at its stock cpu speed

[Lsdmeasap]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

you have to raise the bclk to achive full 1600mhz ram speed as it maxing out at its stock cpu speed

+1

[Chrono Detector]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

How much should I raise the BCLK too? And if I do I must modify the voltages right?

[Lsdmeasap]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

You may or may not have to raise voltages. I do suggest you set your own QPI/Vtt and ram voltage manually though.

Sorry, I have not used P55 yet myself. What is your default Bclk and what memory multipliers do you have, then I can advise you of what you can set for 1600Mhz ram speed. Also what is your CPU multi options

[Chrono Detector]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

Here are the images of my current settings in the BIOS:

Imageshack - 15102009890
Imageshack - 15102009891
Imageshack - 15102009892

Also, to answer your question I left everything on default settings. My default BCLK is at 133, not sure about the memory multipliers, though the images might contain the info.

[C3D76]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

I still thought it was too low of a vtt voltage, until screenshot no 2:
-XMP profile no1 : Profile DDR voltage =1.9v and vtt=1.1v >.<

First of all there should never be more than 0.5v difference between ddr voltage and vtt voltage. And it looks like leaving the voltage on auto (screenshot 3) sets it too high for the Ram... core i7/i5 Ram is usually rated at 1.65v.

Try the same settings with DDR=1.65v, and QPI/vtt=1.25v. If that does not override XMP profile voltages, try disabling XMP, setting mem multi to 2:12 (for 1600) and entering timings manually as well....
I have never used XMP, but is there maybe another profile for 1600Mhz with lower voltage? That profile is definitely wrong (either Ram or BIOS)

By the way, what is your RAM exactly?

[wazza300]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

all you have to do is set bclk to give you 3.2 ghz,set ram multi to give you 1600 mhz disable xmp and set rated ram voltage and timing...you wont need to touch qpi voltage for 3.2ghz

[C3D76]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

Unless he doesn't want to OC the CPU....
I assumed he does not.

[wazza300]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

sometimes you have to raise bclk to get to your rams rated speed like mine @1800mhz i raised cpu to 180 otherwise i would hav had to underclock my ram or cpu

[C3D76]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

Yep, me to some times.
But in his case, he can use 2:12 (screenshot 1) with a bclk of 133. That should give him 1596mhz mem...

Op, both ways should work, + that CPU is asking to be OC'd :)

[Lsdmeasap]

Re: Intel 860 with Intel Turbo Boost on GA-P55-UD5

I suggest disable XMP For sure, then set things manually as suggested

If you do not want to overclock the CPU let us know. To find out what memory multi's you have please open System Memory Multiplier and see what options you have

I do suggest setting ALL of this yourself and not using XMP at all.

I take it this memory was not made for P55 right? Looks like it is not, and rated to run 1600Mhz using 1.9V which I suggest against really.

I would say 1.75-1.8 would be pushing it for sure for a normal user. And even in order to use those you would need at least 1.25-1.3 QPI/Vtt at minimal not 1.1V. Proper QPI/Vtt for 1.9V would be 1.4 or more, not 1.1 as your XMP Profile suggest which is yet another reason to disable and set things manually.

Sorry to let you know this, but I do highly suggest you RMA or return this memory and buy a set made for P55 or X58 so you can run 1600Mhz with the safe voltages in the 1.65V area otherwise if you try to push this kit to at lower ram voltages you may end up frying your CPU trying to get 1600Mhz stable since it was only made to do so with 1.9V and was not made for your platform