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I understand you need information about memory speed for your I7-4770K processor.
Based on the processor specifications, Intel recommends using your processor with compatible memory as this will handle DDR3-1333/1600.
See here for more specifications:
This question has haunted the community for a long time now:
What is the maximum safe voltage a 4770k can give to DDR3 modules?
Even Intel themselves don't seem to know it, the datasheet from the processor says the following:
Page 99: Vddq: 1.5V +/- 5%
However this seems to be the default ddr3 voltage, not the maximum recommended.
As evident in the following i7 memory compatibility chart, which includes many 1.65V rams:
Could anyone please find out which voltage we should be able to use 24/7 without damaging the cpu?
The community advises to stay below 1.8V, but it be great to hear a more official absolute maximum rating.
Any further word on this, please?
Due to a motherboard failure, I've just had to upgrade my i7 920 to an i7 4770 along with an Asus z87-k motherboard (because there were no replacement 1366 socket motherboards, joy).
Everything else from my 5 year old machine I've used... including the Corsair 1600Mhz DDR3 RAM, which is rated at 1.65v.
Unfortunately, I am encountering random, apparently stress-related* graphics glitching, freezing and crashes and having MemTested the RAM, checked the HD can only think that the problem is down to the voltage in these relatively old sticks (having read warnings elsewhere on the internet).
However, as stated above, Intel do specify that certain Corsair 1600Mhz 1.65v RAM sticks are ok,... just not the ones with my code (TR3XG1600C9).
Given I've already had to spend nearly £400 today to try and get my workstation back online, I'm obviously wary about buying brand new RAM on the off-chance that it's merely the voltage that's causing problems!
Any help would be much appreciated - my wee business has already been down for two days because of this catastrophe!
* ie, sometimes when the machine's trying to do 'something' it falls over itself. Other times it just locks and/or glitches.
Your problem seems to be more motherboard related rather than CPU or RAM, i don't think the 1.65v is an issue. You should try and get the latest BIOS for your ASUS Z87 board, plus check the memory compatibility list for your specific ASUS Board, also try contacting ASUS about this as the memory should work just fine.