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Sony Vaio not detecting 512Mb sticks as 256Mb

I am trying to upgrade my 512Mb of RAM to 1024Mb. I have removed the two 256Mb sticks that were fitted as standard and replaced them with two 512Mb sticks. However the system does not see the new RAM as 512 Mb sticks but each as 256Mb. The computer operates correctly apart from the RAM being 512Mb when it should be 1024Mb.
I have fitted 2 x 512Mb 200 SODIMM PC 2700 CL2.5.
I have removed 2 x 256Mb 200 SODIMM PC2700 CL2.5

The laptop is a Sony Vaio PCG-K76P

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  • neilmcleod74 Nov 12, 2008

    Thanks. Believe BIOS is auto/self detecting. It only appears as 512Mb in there also. Is there any way of "forcing" it to see 1024Mb? I have run Everest and it see's two 512Mb sticks of RAM installed


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Check in BIOS to see if set correctly

Posted on Nov 12, 2008

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Can I install more than 512mb of memory on a Presario s5300nx. I actually want to do 2gb or more. If so, how can i safely do it w/o messing up my computer. Thank you.

> I want to do 2GB or more.

As the Rolling Stones sang, "you can't always get what you want".


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So, how many RAM slots currently are empty, and how much RAM is installed?

If you currently have 2 sticks, at 256MB/stick, you will need to remove both sticks, and install two new sticks.

If you currently have 512MB of RAM, and one empty slot, then that web-page describes the exact type of RAM that you can insert into that empty slot.

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Remove the "new" stick of RAM, and re-insert your "old" stick of RAM, and start it.
If it still beeps, how many times does it beep, and is it a "short-long-short" type of pattern?
The number of beeps is important.

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Check that the video-card is properly "seated" into its slot, because an improperly-seated card (knocked loose when you changed the RAM) could cause the beeping.

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Your memory is not supported in Asus QVL = Qualified Vendor Listlist. There are only 4 Kingston DIMMs that pass Asus test for 667MHz. They are;
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DDR2 667 512MB - E5108AE-6E-E
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Try exchanging the memory you bought for one of the above.
It wouldn't hurt to clean both sides of the memorys contacts. Two drops of alcohol onto a cotton sawb. Do not touch the contacts with your fingers.

Link to Asus P5RD2-VM site;

Happy holidays!

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You can install 4GB Sticks but I would not drop the money unless you really need that. I would recommend putting in 2x1GB sticks or possibly 1GB and a 2GB if you really need the power. Any past that needs a 64bit processor. you can also always just go cheap and put in another 256MB, or two 512MB OR just one 512 for a kick.

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maybe your motherboard does not support

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eventhough i am a newbie in this forum, I have already experienced the same problem a while ago in my pc..

The solution is that you have to check that the two memory stick that you have connected is compatible to each other. That is in terms of brand and I see that the 400 MHz (im not sure) is the same so it should work. The one thing that you have to check is the compatibility issue of the two brand.

If they have the same brand, I guess you also have to check if your motherboard support that memory size.

Hope to solve the problem youre having

Dec 10, 2007 | EliteGroup Via P4M266A (P4VMM2 V7.3)...

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