P55 usb3 - 8gb kingston hyper x memory - memtest fail

[mozart999uk]

Just starting to get to grips with a clients PC. He has a P55 USB mobo with 4x 2GB Kingston hyperx 1333 memory,  running at 9-9-9-24 at 1.5V (according to CPU Z). Individually the sticks test fine but put them all in and memtest reports loads of fails. Haven't done tech support for a while so a bit rusty and I'm not familiar with this particular motherboard.  Just working my way through some possible solutions.

Does anyone have a similar config and can help with some ram timings and or voltage settings?

Cheers

[Dark Mantis]

Hi

The first thing I would do is increase the voltage of the memory. You have filled all the slots so the controller is going to be struggling more. The default 1.5v probably won't be enough and you will need to increase it to 1.55v or so. You may have to increase the QPI/Vtt voltage as well to maintain the 0.5v maximum differential between that and the memory.

[mozart999uk]

Thanks so much for your reply.  Really appreciated. I'll give that a go. :-)

[Dark Mantis]

Hopefully it will do the trick but do come back and let us know what happens.

[mozart999uk]

Hi there. Sorry for radio silence. Have not been able to get over to clients place again till today.

According to bios the dram is running at 1.58v (it's set to auto) and qip/vtt is 1.1.


I've looked at the data sheet for his memory here http://www.kingston.com/dataSheets/KHX1333C9D3K2_4G.pdf but can't work out if it should be running at 1.5v or 1.6v.

Don't want to raise the figures anymore until I get a handle on it :-)