andyscott12

Hi Guys!

I currently have DDR3 2000 RAM with timings 9-9-9-27 installed and a friend purchased me some RAM DDR3 2000 RAM with 9-11-9-27.

Under my current Asus P6X58-E MB - Win7 x64 only picks up 3 of the DIMMS and none of the other [says 12GB and 4.99 available] - so in trying, it seems that 3 of the DIMMS are being undetected. Done a memory test and says nothing wrong. Also tried each 3x2GB separately and both work individually - it's when 6x2GB are in together that only 3x2GB are detected.

Gone into the AI Tweaker and following this tutorial - Memory Test

The PIC is a bunch of stuff in relation to my RAM - Slots 1,3,5 are Kit 1 - Slots 2,4,6 are Kit 2 - would love any advice on what settings I would need to get access to all 12GB ? [or close enough] otherwise I'll have to try and return the RAM and get equivalent 9-9-9-27 [massive pain to be honest]

I've tried setting VDIMM to around 1.64V and QPI/DRAM around 1.35V - but I still arent getting the full 12GB accessible. What would I need to setup in the BIOS to make this work ?

eva2000

hi andyscott, as per http://i4memory.com/ramdetect your QPI/DRAM (cpu vtt) voltage is too low for 6 dimm slot population, the link at http://i4memory.com/ramdetect has suggested guidelines for such voltages to start with

probably need to try voltages that aren't suited for 24/7 if you want rated mem speeds, if you want 24/7 safe voltages you'd need to underclock your memory i.e. DDR3-1600Mhz 9-11-9-27 at 1.66v memory volts and cpu vtt (QPI/DRAM) between 1.35-1.45v for 6x2GB. If you want to push DDR3-1600-2000Mhz then you'd need QPI/DRAM 1.45-1.65v which is cpu killing volts for 24/7 as per http://i4memory.com/ramdetect has link to Intel Core i7 920 Overclocking Introduction Guide on X58

Also as per http://i4memory.com/ramdetect Further Recommended Reading & Examples links listed in first post, some links will have suggestions for manual voltages which are needed rather than leaving stuff left at AUTO

andyscott12

Thanks so much for the response

I have tried reseating the RAM in the relevant KIT configurations [one kit in blue RAM, one kit in black RAM] - Slots 1,3,5 are Kit 1 - Slots 2,4,6 are Kit 2 - AND also the CPU - still doesn't seem to help my problem. Shows installed 12 GB while 4.99 Usable

I tried voltages that 24/7 safe voltages such underclock my memory i.e. DDR3-1066Mhz 9-9-9-24 at 1.64v memory volts and cpu vtt (QPI/DRAM) between 1.35 for 6x2GB - but still doesn't help either :S :S

Really no idea WTF is going on. Anyone have any ideas ?

andyscott12

The two products I have are

http://www.patriotmem.com/products/s...36G2000ELK.pdf

http://www.patriotmemory.net/product...36G2000ELK.pdf

And they just don't seem to be working together

GenAn

You will probably have to go over 1.35v on VTT. Have you tried 1.4~1.45v?

andyscott12

thanks for the response

i tried 1.45v - no luck with the 9-9-9-24 config anyway. maybe i need to try 9-11-9-27 @ 1333 or 1066 with 1.65v memory volts @ 1.45v?

Little worried about exceeding >1.45v and keeping cpu vtt that high [PC stays on for around 20 hrs a day]. if I have to hit 1.5v ... and it works, is this stable ? alternatively, if it doesn't work ?

eva2000

Maybe it would best if you opt for a 3x4GB kit of memory prices from corsair, gskill, mushkin are coming down for 3x4GB and 4x4GB kits for x58 and p55/am3

andyscott12

hey guys - yeah just seems this combo with my MB won't work

tried again at 10-11-10-27 @ 1066MHZ with cpu vtt 1.5V and memory 1.65v and still win7 x64 won't recognise. it's recognised at POST bios - but won't load in Win7. just seems these models aren't compatible or rather simply won't load on my MB - x58 seem to be funny with RAM models and require a fair bit of tweaking and >1.5v just isn't stable for 20hr+ usage - my CPU will fry.

i think i'll return the RAM and get 12GB of 4x3GB @ 1600MHZ and just overclock it a little to achieve a similar performance ratio as per eva2000 recommendation [thanks!]

thanks for the great advice none the less