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Motherboard + Memory compatibility question

Last response: in Motherboards
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July 17, 2011 8:36:31 AM

I have ordered a new motherboard for myself (ASUS M5A78L LE) and I am wondering if I'll be able to use my old RAM kit on it. It's DDR3 Princo Turbo 1800MHz CL8 or should I go ahead and buy myself a brand new DDR3 2X2GB 1333MHz?

http://memory.princo.com.tw/product/1800.html - RAM
http://www.asus.com/Motherboards/AMD_AM3Plus/M5A78L_LE/ - Motherboard
a c 435 V Motherboard
a c 128 } Memory
July 17, 2011 10:29:29 AM

Try your old ram first. Most ram is backwards compatable.
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a b V Motherboard
a b } Memory
July 17, 2011 10:30:19 AM

Looks Compatible. Though am pretty sure they will run by default at 1333 MHz clocks at default. That motherboard only supports 1800 MHz via overclock. Means you have to adjust timings in BIOS to attain those speeds.
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a c 264 V Motherboard
a c 108 } Memory
July 17, 2011 5:26:18 PM

You want documented ram compatibility. If you should ever have a problem, you want supported ram.
Otherwise, you risk a finger pointing battle between the ram and motherboard support sites, claiming "not my problem".
One place to check is your motherboards web site.
Look for the ram QVL list. It lists all of the ram kits that have been tested with that particular motherboard.
Sometimes the QVL list is not updated after the motherboard is released.
For more current info, go to a ram vendor's web site and access their ram selection configurator.
Enter your motherboard, and you will get a list of compatible ram kits.
While today's motherboards are more tolerant of different ram, it makes sense to buy ram that is known to work and is supported.
In this case, since you already have some ram that looks like it should work, go ahead and try it.
If there should seem to be a problem, check first to see if the motherboard has a bios update available that might address the problem. Such bios updates often address ram issues.
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July 17, 2011 6:40:57 PM

I thought as much. My RAM would work but the Mobo would bottleneck it. What do you mean by adjusting timings? I have to go to bios and it will be set 1333Mhz by default so I have to overclock back to 1333Mhz? Sounds a bit... absurd... and funny... so for my 1800 MHz ram to work on 1800 I have to OC it from 1333Mhz to 1800... lol... Don't understand ASUS on this one, if they 've gone through so much trouble to get it work on OC why not just implement 1800Mhz as standard. Ty for reply. I checked all the websites before including ASUS site and Princo memory site and both were pretty obscure regarding compatibility with limited information.
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July 18, 2011 9:09:41 AM

Best answer selected by nightmare106.
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