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Ram Or Motherboard Problem


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#1 Sterling14

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Posted 14 February 2007 - 08:32 AM

I wanted to upgrade my dads old computer to use it for web browsing. Its from 1999 I think. Well anyways my friend had an old stick of 168 pin Sdram pc133, 256mb ram. I put it in my computer and everything starts up fine, but its only detected as 128mb. This is weird because the motherboard can support up to 256mb. I then put the old 64mb stick back in (thought it might get confused if i put too much ram in) with the 256 stick and its detected as 192mb. I'm wondering if its the ram or my motherboard doing this. I guess 64mb more isn't going to make a huge difference, but I think its weird that the sticker says 256mb, and its only 128mb. Also I looked it up using everest and it said it is only a 128mb stick.

One of my conclusions was that since it has 2 slots for ram, and only supports up to 256mb, it figured you would put in two sticks of 128mb. My other conclusion was that the sticker is just wrong :thumbsup: . My graphics don't use system memory, and I don't have any other computers this old to test it on. Any suggestions are greatly appreciated!
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#2 stevealmighty

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Posted 14 February 2007 - 08:57 AM

Sounds like your new ram that you installed is the wrong type, so your mobo won't recognize it. If your mobo supports 256 ram, but only supports 233mhz and the ram your installing is faster than that, then it won't recognize it. :flowers:

You can try to search the web for older ram to fit it and work, but you'd have to get the specs from your motherboard to ensure that you're not wasting your money buying more ram that won't work. :thumbsup:
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#3 TheTerrorist_75

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Posted 14 February 2007 - 09:40 AM

The PC recognizes 256MB of total RAM. 128MB in each slot. That is why the 256MB stick is seen as 128MB. Common for old Socket 7 motherboards.
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#4 IainR

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Posted 16 February 2007 - 07:00 AM

Similar problem here. I've an A Open MX3W Pro E. Checking this out on the memory advisor at Cruical.com and it came out that this mobo would cope with a max of 512MB up to PC133. This is confirmed on the AOpen website. I've put in a Kingston Value RAM KVR133X72C2/256 but it's only recognised as 128MB.

I've come across some references to updating the BIOS, so I've tried downloading the update from the AOpen site, but it does not appear to have made any difference.

Edited by IainR, 16 February 2007 - 08:21 AM.


#5 nforce

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Posted 17 February 2007 - 01:02 AM

Like said before, mobos might only support 128mb per slot or somthing. Another thing is that if you try to use high-density ram on a motherboard that does not support high density, It will only detect half of what there really is and not really work.

#6 dc3

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Posted 17 February 2007 - 01:37 AM

If you know the make and model of the computer or motherboard if it's a custom build you can go to Crucial and use their memory advisor. This will tell you what RAM is used in your computer and the maximum amount per slot.

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