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Mixing RAM batches on Asus P5Q?

This is a discussion on Mixing RAM batches on Asus P5Q? within the RAM and Power Supply Support forums, part of the Tech Support Forum category. The MB is Asus P5Q Pro w/ E8400. There are currently 4GBs (2 sticks) Mushkin Blackline DDR2-800 5-4-4-15. The MB

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Old 11-05-2017, 12:07 PM   #1
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The MB is Asus P5Q Pro w/ E8400. There are currently 4GBs (2 sticks) Mushkin Blackline DDR2-800 5-4-4-15. The MB has 4 slots A1, A2, B1, B2. The A1 and B1 slots are colored yellow, and that's where the sticks currently reside. (The user manual says to use the yellow slots for overclocking. Memory OCd well but one of these cores is marginally stable at higher speed so it's all set default.)

Now I need to go up to 8GB. The Blackline is now longer made but can still be had - for a small fortune. So I bought 4GB of used Markvision** 5-5-5-15. (I know; I never heard of them either. But $14!) So the question is, how should I configure the new setup?

Should I leave the Blackline in the yellow slots, or segregate the two batches by channel?

Any point in running the memory with a faster clock?


** Markvision is a Lexmark brand. No idea who actually makes it.
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Old 11-06-2017, 07:07 AM   #2
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First, I hope this is going in the 64-bit system you show or else the extra 4GB will be wasted.

I say just try the new sticks in the empty slots and see what happens. The system typically will default to the lowest (or in this case, slowest) common factor. And that's okay because "more" RAM always trumps "faster" RAM.
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Old 11-14-2017, 01:40 PM   #3
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Any time I get new memory I test it 1 stick at a time with Memtest 86 https://www.memtest86.com/technical.htm
I have an old 775 board(Giga P43-ES3G) that is very picky about memory, I had 2 Kingston 2gb hyper X and bought 2 sticks of 4GB crucial to up it to 8GB and the first ones I got one tested bad so I sent them back and got a good pair that worked. So Test the new stuff first before trying to mix. I my case the Kingston wouldn't mix with the Crucial.
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