Kingston @ 1.65v on P55-USB3

[Darkling]

I would like to know if the following setup is combatible :

i5-750
gigabyte ga-p55-usb3
KHX1333C7D3K2/4GX Intel X.M.P, DDR3-1333, unbuffered DIMM. 4GB 7-7-7-20 1.65V

I am asking because most rams on the market are CL9 and 1.5v. Do i have to do anything in the bios or it will detect them automatically?

Also if i want to overclock the CPU am i limited by the 1.65v on the ram? I mean does ram voltage has to do anything with CPU overclock?

[Dark Mantis]

Hi and welcome to the Gigabyte Forum.

Firstly have you checked to see if the modules appear on the QVL for this board or the board is on the QVL of the memory manufacturer?

If they are there should be no problem running htem. They have an XMP attached so normally it is just a case of going into the  BIOS and setting them to use the XMP setting.

You can go over the 1.65V  setting if necessary but you would have to ber careful and keep the QPI/Vtt within 0.5V of the memory setting.

[Darkling]

Thanks for the quick reply, yes i checked the compatible modules and this kit isnt in it. i don't worry about that simply because there are so many ram kits and it is normal some not to be listed. I saw an OCZ with the same voltage and timings (7-7-7-20 @ 1.65v) in that list so i should be all set.
So i am guessing i just install the ram and enable the XMP on the bios and it should recognize the kit. Otherwise i set the timings and voltage manually?
I haven't got the board yet i just ordered it.

[Dark Mantis]

Yes that's pretty much it. If the memory isn't on Gigabyte's list I wouldn't worry unduly but I would check the memory manufacturer's site for their QVL of motherboards/memory. I take it you already have the modules?

[Darkling]

Yes and waiting for the other parts to come. I will check the site, i shouldnt worry too much if the board isnt listed right? Kingston are very popular rams they shouldnt be an issue.

[Dark Mantis]

If you already have them then we are stuck with them I guess and will have to do our best to make them work.

[Lsdmeasap]

Just set the BIOS to spec and you should be fine unless there is some major compatibility issue.

1.65V memory is the norm for these boards, 1.5v memory is just non=performance DDR3l, it's not anything you have to use at all.

Set 1.66V ram voltage in the BIOS, adjust your memory multi and timings, and then you will need to tinker with QPI/Vtt until you find the sweet spot for your CPU (Maybe 1.15-1.3)

[Darkling]

Just set the BIOS to spec and you should be fine unless there is some major compatibility issue.

1.65V memory is the norm for these boards, 1.5v memory is just non=performance DDR3l, it's not anything you have to use at all.

Set 1.66V ram voltage in the BIOS, adjust your memory multi and timings, and then you will need to tinker with QPI/Vtt until you find the sweet spot for your CPU (Maybe 1.15-1.3)

You mean dont use the XMP profile to detect em automatically? I know we are talking without an example cause i havent got the mobo yet but i like to plan ahead 

[Dark Mantis]

Lsdmeasap doesn't have a lot of faith in XMP settings so he always likes to use his own. That's fine but if they work why not use them is my reasoning. Besides he can make anything work

[Darkling]

Oh i see, ok thanks guys i will report once i assemble it.

[Darkling]

Just got the motherboard in my hands but i am at work currently and will test the Rams later. What i wanted to ask is about the Turbo USB3 function in the BIOS. I am reading through the manual and i am a bit confused. Should i disable that function in order for the PCI Express to run at x16?
It says (if i am getting this right) that when enabled the PCI express runs at x8. Is that true? The setup i am going to use will be a single VGA card at the PCI 1 slot. Should i leave this option disabled for it to run at x16? With this option disabled and Onboard USB 3.0 Controller -> Enabled i still have usb 3 support and x16 PCI express right?

[Dark Mantis]

You have understood it properly as the USB3 and the PCIE share bandwidth and by increasing one you will limit the other.

[Darkling]

You have understood it properly as the USB3 and the PCIE share bandwidth and by increasing one you will limit the other.

So with Turbo USB3 disabled and Onboard USB 3.0 Controller enabled i still have usb3 support and x16 PCI express right?

[Dark Mantis]

That is my understanding of it , yes.

[Lsdmeasap]

Lsdmeasap doesn't have a lot of faith in XMP settings so he always likes to use his own. That's fine but if they work why not use them is my reasoning. Besides he can make anything work