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Installing memory

By jewelfordscott ·
I attempted to upgrade a pc's memory from 128mb SDram PC100 to 512mb PC133 SDram. The operating system is windows XP. I was told that the speeds PC100 and PC133 were interchangeable. Also the new memory is non parity. Does the non parity matter, I have researched some literature and cannot find this addressed. Is it the speed that is the problem? When I booted the machine up, the monitor would not give the display.

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Installing memory

by dRb63 In reply to Installing memory

The parity and non-parity really played an issue with most older systems. But on the lighter side, you shouldn't really mix the two. If you get them to work together then you may have just seen the seventh sign. Anyhow, the words "supposed to work" are all too familar. Yes, new technology is "supposed" to work with older technology. But sometimes, it just doesn't. We've had the same problem within our company and instead of looking for "work-a-rounds" or documents that "prove" otherwise, it's much easier to get what the systemboard manufactuer calls for. Yes, it may cost a few dollars more but overall, you'll be much happier.

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Installing memory

by jewelfordscott In reply to Installing memory

Was the speed a factor?

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Installing memory

by sgt_shultz In reply to Installing memory

i think you are correct that the pc133 should work in a machine capable of pc100. it sounds like you replaced all the ram and now none of it works. (as evidenced probably by 'no display'). tell us more about exact ram configuration. which ram in which slots. what is the pc model number? my instinct is that you have something else wrong, not speed but perhaps the wrong ram for your pc or the wrong slots. do you have your motherboard documentation? from whom did you buy the RAM? armed with your motherboard info or your BIOS number, check out some memory websites, perhaps www.memory4less.com...
there are lots of things that can go wrong, best thing is to have your motherboard manual...

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Installing memory

by jewelfordscott In reply to Installing memory

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by EDSDave In reply to Installing memory

Try placing the faster 100Mhz RAM in slot 1 and follow with the 133Mhz. If that doesn't work try just the opposite. You may need to check out the motherboard manufacturers web site to get info on which is slot1.

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Installing memory

by jewelfordscott In reply to Installing memory

I don't have the motherboard documentation. But I can say that no matter which slot I installed the card in it didn't work. When I replaced the 2 DIMM 64mb the pc started up fine and the display was fine as well. If it is not the speed of the memory, could it be that the parity WAS the problem, it was non parity.

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Installing memory

by D_V Ant In reply to Installing memory

It is a possibility that your PC will not accept a 512MB module. You may need to go with two 256MB modules. If you could post the make and model of your PC\motherboard, we could verify this for you.

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Installing memory

by jewelfordscott In reply to Installing memory

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by megasurfer In reply to Installing memory

Some Mother Boards that are designed to work with PC100 memory will work with PC133, others will not. Also, some mother boards will not work with the larger memory modules (256 & 512) unless they are double sided. Also check the documentation for the MB and make sure it is designed to handle 512 MB modules

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by jewelfordscott In reply to Installing memory

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