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Old 02-22-2011, 04:11 PM   #11 (permalink)
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Join Date: Feb 2011
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Default Re: RAM only recognized sometimes

Finally!!! I have this same problem. Same processor but an msi mobo instead of the asus. I'm thinking it could be some weird issue with the Intel Sandybridge chipset. (it wouldn't be the only problem discovered so far) Keep this thread alive! I need a solution!

BTW... My ram tends to show up after I enable and then disable the OC Genie II feature on the my MSI motherboard. Hope this little bit of info helps.

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Old 02-22-2011, 06:19 PM   #12 (permalink)
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Default Re: RAM only recognized sometimes

I'm thinking this may have something to do with the memory being used. Most of the memory available right now is rated for 1.65v, this was fine for the older i3, i5 and i7 cpu's as the integrated memory controller worked at 1.15 volts (the DRAM Voltage needs to be within .5 volts of the Integrated Memory Controller Voltage).

1.65 - 1.15 = .5

The Memory Controller on the new Sandy Bridge based cpu's is 1.05v.

1.65 - 1.05 = .6

.6 is out of spec.'s

If your having problems it could be the memory controller having difficulties running out of specifications. I would try raising the Integrated Memory Controller Voltage to 1.15 volts. In your system bios the Integrated Memory Controller Voltage is called the VCCIO Voltage.

I just bought a 8GB (2x4GB) set of Corsair Vengeance DDR3 1600 8-8-8-24 @ 1.5v and I'm not having any problems.

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