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My pc won't post after adding additional 2 sticks of ram

Last response: in Motherboards
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December 21, 2009 5:36:46 PM

my specs are:
gigabyte ep45-ds5
intel core2duo E8500 3,16 ghz
2x1 gb apacer pc2-8500 CL5-5-5-15
seagate 640 gb
550w power

So, I bought an aditional 2x1 gb kit patriot PVS22G8500ELKN DDR2 5-5-5-15 and when I put them in, my PC won't do anything. The fans turn on, but that's it. There is no bios beep, it's like only the fans are working. The new kit works perfectly when I take the old ones out in any slot configuration. What could I do?
a b V Motherboard
December 21, 2009 5:53:13 PM

If I were you, I would install the old kit, then adjust the BIOS settings to be manual. This let's you raise the voltage up a little, like from 1.8 to 2.1 (check specs on your RAM). You might want to specify the manual timings for the RAM (5-5-5-15).

Once you've adjusted the voltage and timings to be manual, reboot, see if the old ram by itself boots at this setting. If it does, try adding the new ram.

If it still doesn't work, try adjusting the timings to slightly lower, like 5-5-5-18, 5-5-5-25, or 6-6-6-25.

If you are overclocking, that changes alot, please tell me if you are.
December 23, 2009 9:36:21 AM

Thanks for your reply. I've raised DRAM voltage from 1,8 to 2,1V , DRAM termination from 0,9 to 1,05V, channel A reference from 0,9 to 1,05V and channel B refference from 0,9 to 1,05V. That didn't help as I was getting the same problem. Then I adjusted the timings to the values you specified in your post but still nothing.

Do you have any other advice?
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December 23, 2009 9:46:08 AM

Oh, yeah I'm not trying to overclock. Both memory kits are specified to work on 2,1V and 5-5-5-15 timings.
a b V Motherboard
December 23, 2009 2:03:25 PM

Well, I usually run Memtest86 with one stick of ram in at a time to make sure the sticks are all good. Verify that first, I guess.

What divider or RAM speed does your BIOS say you are using? Is it verified in cpu-z?
a b V Motherboard
December 23, 2009 10:19:01 PM

Wait, all four sticks are listed at 2.1V? Try giving them 2.15. With four sticks in, RAM often takes a little more juice than spec.
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