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Overclocking P5B with 4 dimms - impossible?

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March 4, 2007 8:58:44 AM

OK. I bought an extra gig of ram, (667 mhz Corsair) which now makes it a total of 2 gigabytes composed of 4 sticks.

Upping the FSB to the usual 333 for a slight overclock of my E6300, I can't even post (let alone boot). Asus automated recovery (or whatever its called) doesn't work. I had to clear the CMOS with the appropriate jumper.

Setting manual RAM timings and freq. didn't alleviate the problem.
What's surprising - I flashed the latest BIOS version (1102) which according to relase notes - supports 4 dimms.

Any ideas/ suggestions?
March 5, 2007 6:13:16 PM

voltages?
March 6, 2007 12:26:59 AM

remove the extra ram and see if it goes back to normal.

are all four stick identical (brand, model, speed, latency) ?
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March 6, 2007 7:58:02 AM

It does go back to normal. All ram is from Corsair, identical in every aspect.
What bugs me is: BIOS version is supposed to support 4 dimms, yet I should forget about overclocking.

Setting RAM voltages to Auto - I see BIOS running it at 1.8 (which is not 1.9 specified by Corsair). Manual setting to 1.9 does not change anything.
a b V Motherboard
March 6, 2007 9:02:33 AM

I got the same thing last year, oddly enough with Corsair too.

All I needed to do was loosen the timings a little bit and it flew without needing to raise the voltages. Although the RAM became more 'latent' the increased quantity made the machine faster and more responsive overall.

Q
March 6, 2007 9:10:35 AM

Oh man, the timings are already bad enough :) .
Its the VS series ram, smth. like 5-5-5-15.

well, its a slot-filler for now. I'll buy 2x1gb XMS series next week.
a b V Motherboard
March 6, 2007 9:46:42 AM

Grin - mine was XMS !

Q
!