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I mixed 2 different RAM types!

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January 3, 2010 3:21:19 AM

Should I change the timing on one of my RAM modules so that they both match?
4 gigs G.Skill RipJaw seires DDR3
9-9-9-24

2 gigs Corsair DDR3
8-2-5-4

I upgraded by adding 2x 2 gigs of the G.Skill RAM... should i just take the Corsair RAM out? I hear that mixing different RAM is bad...

More about : mixed ram types

a c 103 B Homebuilt system
January 3, 2010 3:25:41 AM

The ram will default to the lower speed. In this case the Gskill. Sometimes different ram can cause instability, if you are not experiencing that don't worry.
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January 3, 2010 3:31:37 AM

rolli59 said:
The ram will default to the lower speed. In this case the Gskill. Sometimes different ram can cause instability, if you are not experiencing that don't worry.


I've been actually having system instability... The computer will randomly crash on me... but it has happened when i just had the 2 gigs of ram...
i made a thread a few weeks ago about it...
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a c 103 B Homebuilt system
January 3, 2010 3:35:44 AM

Well try pulling out the corsair, now that you have more ram and see if it goes away.
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January 3, 2010 3:37:01 AM

hmmm... ill give it a shot
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January 3, 2010 3:54:59 AM

Corsair XMS 3 DDR3 RAM...
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a b B Homebuilt system
January 3, 2010 6:01:35 AM

Most G.Skill Ripjaws DDR3 runs at 1.5V. Most Corsair XMS DDR3 runs at 1.65V. That's going to cause problems.

http://www.newegg.com/Product/ProductList.aspx?Submit=E...
http://www.newegg.com/Product/ProductList.aspx?Submit=E...

If the Corsair was the original RAM that was causing freezing, my guess is that it takes 1.65V and your motherboard defaults to provide 1.5V, which would mean it will freeze randomly unless you set the voltage to 1.65V yourself.

Since you added more RAM and are now at 4 sticks, you probably need to bump up the voltage even more because that's one of the weird quirks of using all 4 slots. So to get the Corsair to run right, I'd try 1.7-1.75V. Now, since the G.Skill memory is only at 1.5V, you're going to be oversupplying it. So your options are to either send it back and get something with a voltage that matches your original RAM ... or cross your fingers, jack up the voltage and hope the G.Skill can handle the extra 0.2-0.25V without burning up.
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January 3, 2010 12:55:05 PM

hmmm, very interesting reply, i would never had thought of taking ram voltages into consideration... I will take a look at my BIOS in a short while... I checked the Corsair, it says on the side, 1.60V ver2.2

So I'll see what my default voltage is in the BIOS, and try changing it accordingly... Thanks!
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