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Dual Different Rams Both DDR2 800 running @667 why

Last response: in Memory
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April 12, 2014 10:23:07 AM

I have 2 Rams Both 800MGz
1 Kingston 800MGz
1 Corsair 800MGz
They run @800MGz Separately
They run @667MGz togather
Why ?

a b } Memory
April 12, 2014 1:22:29 PM

In dual channel mode it is extremely important that the 2 sticks of memory be MATCHED in every aspect; brand, timing, voltage, speed, manufacturing date/batch, etc. If not, problems can arise. That is why dual channel memory is sold in matched pairs.
It also appears that in the SPD tab, the XMP (profiles) do not match. That may be one reason they can't auto adjust.

You can try going into BIOS and not using XMP. Then setting every single timing the same as the weakest stick. But it may still not help.
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a c 2043 } Memory
April 12, 2014 3:52:22 PM

With DDR2 you need to manually set they up, go into BIOS and set freq to 400 (800 as it's DDR DOUBLE data rate), then the proper timings, for these I'd try 6-6-6-18, believe these are 1.8 sticks so try DRAM voltage at 1.85 initially - if no joy with those settings try same and raise the MC (memory controller) voltage + 0.06, Mobo and CPU not listed so if Intel, guessing the MC voltage will be the NB or Northbridge if an AMD Mobo look for CPU/NB voltage
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April 13, 2014 10:01:21 AM

what happen if i simply Over clock it
I have
AMD Athlon II X2 245
ASUS M2N68-AM PLUS
ASUS 5450
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a c 2043 } Memory
April 13, 2014 1:50:27 PM

Try taking it up as suggested above
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