Did I get the wrong memory for overclocking P8P67?

[snowbound]

I just built a new Sandy Bridge build with

Intel Core i7 2600K Quad Core Unlocked Hyperthreading Processor LGA1155 3.4GHZ Sandy Bridge 8MB

ASUS P8P67 Deluxe ATX LGA1155 P67 3PCI-E16 2PCI-E1 2PCI Sandy Bridge B3 Motherboard

Corsair XMS3 CMX8GX3M2A1600C9 8GB 2X4GB DDR3-1600 CL9-9-9-27 240PIN Core i5 i7

Corsair TX750W 750W ATX 12V 60A 24PIN ATX Power Supply Active PFC 140MM Fan

I would like to overclock this system shortly but find out that to attain the DDR3-1600 speed that the memory has to be running at 1.65v which is outside of the spec for the Intel Sandybridge. The 1.65v as far as I can tell is the spec for the prior S1156 motherboards vs the S1155 1.5v Intel and motherboard. Is there a chance if one uses 1.65v in order to get the memory to run at 1600 speed that it will cause problems with the memory controller in the long term?

I have seen reports of this motherboard not booting up properly from a cold boot after it has been overclocked when using memory running outside of the Intel spec voltages. Have I made a mistake in getting this particular Corsair memory?

 

[bankster55]

IMHO running any RAM at higher than 1333 1.5V is a waste on a P67 overclocked mobo. These are such powerhouses that the dif in speed is only good for impressive bencmarks, not real life
I bought 4 4GB Supertalent 1333 1.5V "value" sticks on sale at superbiiz for ~$28 ea. IIRC. The ones that came had micron chips but YMMV. You can also select supertalent individually for chips like samsung Elixir Micron hynix

 

[SuPrEIVIE]

For sandy bridge setups you really should hunt for 1.5V or under memory and also memory clocks do not limit cpu OCs because it is done by the multiplier rather than FSB. If you can without taking a loss you should return it for some 1333mhz 1.5V. Unless you are running an out of this world amount of programs at once you will not notice much by going for higher mhz or even lower timing ram. Bit tech has got some good reviews with advice on OC 1155s such as this one http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/2

here is what you can do with your 1.65V memory according to article:

VCC/VCCIO/CPUIO: Vcc is the voltage at the IO (Input/Output) terminals to the CPU. Generally at 4GHz or under this doesn't need to be adjusted, but at 4.5GHz it can require a small bump to between 1.15V and 1.2V, depending on the quality of your CPU. Using over 1.2V should only be necessary if you're pushing the CPU toward 5GHz or more. Equally, if you're using the maximum memory multiplier, you will likely require about 1.25V here. Using over 1.4V is not recommended at all - you have been warned!

VCCSA: The 'System Agent' is a facilitator unit in the CPU itself, and its Vcc (essnetially, voltage') is related to the Vcc IO above. It's default voltage is under 1V. The same rules apply here as above thugh, the only difference is if you're testing how far the Base Clock will go, then as much as 1.3V, or even 1.35V will be needed, but that's only recommend for benchmarking with appropriately strong cooling and not long term use. using over 1.4V is not recommended at all.

Memory Voltage: As with LGA1366 and LGA1156 CPUs, keep this value to within 0.5V of the VCCIO voltage to prevent long term damage to the CPU. By default, this is 1.1V, which means the 1.65V used by previous Intel DDR3 memory is still acceptable. However, more recent memory will be rated at 1.5V (or even 1.35V if you choose a low-voltage kit). Increasing the VCCIO voltage obviously gives you more overhead on your memory voltage (remember, add +0.5V at most or risk damaging your CPU).

Intel Extreme Memory Profile (XMP): XMP is a safe memory overclock profile that's saved on the memory modules themselves. Beware that some motherboards might not handle the XMP settings of older DIMMs designed for LGA1156 systems. If you are carrying over an old set of memory, save your BIOS settings before using XMP and then check the voltages that are automatically applied.

On kits designed for LGA1155 P67 or H67 motherboards, XMP is best turned on to get the most out of the shiny new memory you've just purchased. However, check if the XMP profile forces a change on the VCCIO and VCCSA that might affect your CPU overclock before saving and trying to boot Windows."

 

[snowbound]

If you can without taking a loss you should return it for some 1333mhz 1.5V. Unless you are running an out of this world amount of programs at once you will not notice much by going for higher mhz or even lower timing ram. Bit tech has got some good reviews with advice on OC 1155s such as this one http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/2

I would have to pay for shipping and take a 15% restocking fee. Sigh. Right now the memory is running at 1.5v and 1333. Thanks for the link will loook at the suggestions.

 

[BoomerD]

Truthfully, I doubt you'll notice the difference between 1333 and 1600.
I have the same basic RAM in my 1156 build. I can't tell the difference between the stock setting of 1333 and the XMP setting of 1600.
Is it a bit slower? Probably, but not by a noticeable amount...

 

[PreferLinux]

You don't need the faster speed for overclocking, as you are multiplier overclocking.