Z68A-GD65(B3) Memory Problems

In an effort to install more memory, I'm having the following problems with my Ram:
1. The computer will only boot with a memory stick installed in the DIMM4 socket.  No other socket will work.
2. Both bios and Windows only recognize the memory installed in DIMM4.  Memory sticks installed in the other sockets are not recognized.
3. If a memory stick is installed in DIMM3 (in addition to DIMM4), the computer will not boot.
I have tried the following: (the bios was cleared before all of these)
1. Reverting to all default settings for bios.
2. Customized voltage (1.65V), timing, clock speed, etc. to match my DRAM.
3, Removing the CPU to check for bent pins.  None were found.
4. Re-flashing bios with the latest available release.
I would appreciate any suggestions for additional things I can try before RMAing my MOBO.
Thanks,
Bill ([email protected])
Z68A-GD65(B3), BIOS V22.6, i5-2500K, Windows 7 Ultimate 32-bit
Patriot Viper Extreme 1600MHz, now 4Gb, but would like to take it to 16Gb
Zotoc nVidia GeForce GTS450
Cooler Master 650W ATX12V
WD Caviar Black WD1502FAEX 1.5TB SATA 6.0
Sony DVD/CD R-W w/LightScribe combo drive

Quote from: Bernhard on 02-March-12, 11:08:36
Which BIOS do you have on that board ?
If some RAM slots are not being recognised, then there is a possibility that you may have bent some CPU socket pins. You will have to remove your CPU and do a proper inspection of the socket grid array and whether your CPU contact pads have even pin imprints on the contact pads. Use a magnifier and a strong light for the inspection.
Thanks Bernhard.  I have v22.6 BIOS.  I removed the cpu and inspected the socket pins and cpu contact pads as you suggested.  As near as I can tell, they are all fine.  I probably should have mentioned that I had previously replaced the main board and reused this same cpu on the new one.  So, it makes it difficult to tell if the pads on the cpu are showing the imprints from the old board or the new one.  Also, I was having a similar problem on the other board.  When I installed additional memory on it and tried to boot up, there was an odor of something burning and the board would never boot again, regardless of where memory sticks were installed.  So, I RMAed both the main board and all of the memory sticks.  I am starting to suspect that the cpu itself has a problem.
Bill
Bill

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    Quote from: HU16E on 10-March-12, 20:18:08
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    I had this very same problem with a Biostar T-POWER I55 2 years ago, to cut a story short the retailer and the distributor who handled Biostar RMA's rejected the RMA.
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    Quote from: HU16E on 01-May-12, 19:16:09
    What does the DRAM V. 'Read Only' voltage read? Might try to set it manually to 1.521v and see if that helps. To really be of help, a full listing of all your systems components will be helpful in troubleshooting. It would also make it a bit easier if the settings you have are listed too. The sub section 'CPU Features' has some settings that can cause problems if not set right as well as in the Eco Section. EuP 2013 should be disabled for example.
    I always changed the DRAM Voltage to 1.652 volts, and set the speed with XMP (1600mhz).
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    EDIT:  The problem seems to be related to the "Advanced Settings" section in the UEFI, which includes the settings : to disabling the onboard LAN + external sata 6gb/s and changing the boot order and enabling hot swap.
    The problem is in other words related to the onboard lan disable, external sata 6gb/s, changing boot order or enabling hot swap on sata port1. So i left those 4 things at default and it appears its working now since i have now rebooted and saved & exited bios many times since i decided to narrow this problem down.
    I have now successfully done the following to help out with the OC:
    Disabled:  EIST, Speedstep, Turbo boost, EuP2013, C-state, Overspeed protection, C1E Support, Power technology, Spread Sectrum.
    Enabled: Internal PLL Overvolt and XMP profile.
    Manually: Set memory voltage to 1.652v, CPU voltage to 1.325v (doin OCCT linpack right now, seems stable so far)
    Using BCLK: 100.2 (10010 in bios) to compensate up from 99.8mhz.
    Will get back soon.
    EDIT2: BSOD after 50mins OCCT at 4.5ghz 1.325v, backed off the BCLK increase from 100.2 to default 99.8, and upped volts to 1.330v, if its stable, im backing off volts to 1.325 again and running again.
    Also tried to disable onboard LAN, disable serial port, UEFI still functions properly. It seems the problem is caused by enabling Hot Swap.
    Question: what should i put PLL volt on?

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