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Thread ID: 15094 2002-01-28 12:22:00 RAM Guest (0) Press F1
Post ID Timestamp Content User
33263 2002-01-28 12:22:00 My mates computer currently has 64MB of 100 RAM, recently he purchased 128MB of 133 SDRAM, the sales guy, told him he just had to clip it in and it will be sweet, the chip is in but only the 64MB is being recognised, what does he need to do so that he can use the 128MB, and is it possible that he could use both chips so that he has 192MB of RAM even though they operate at different speeds. I hope you can help with the information I have provided. Guest (0)
33264 2002-01-28 12:33:00 PC133 ram will work in a slower system, it slows down to match it.

If its only reading 64MB off the new stick then you will need to return the stick and get one that has chips on both sides of the stick.

If its not reading the new ram at all, then check its inserted all the way, it has to click at both ends of the stick.
Guest (0)
33265 2002-01-28 12:46:00 No its not reading the new RAM and it is inserted correctly. Guest (0)
33266 2002-01-28 21:13:00 If you have not done so already, try taking out the origional 64 MB and putting in only the 128, as there have been instances where different ram just don't like each other.

Hope you have been paying attention to the prospects of static electricty doing damage while unearthed and 'fingering' the new module.
Guest (0)
33267 2002-01-28 21:34:00 I had a similar experience just 2 days ago - bought 256MB SDRam 168-pin chips only on one side stick from DSE.

Try#1
Original 64MB on bank 0, 256MB on bank 1 - only 128MB of new ram recognised - total = 192MB
Try#2
Swapped sticks around, still 192
Try#3
Left 256 on bank 0 and took out 64, again 192
Try#4 - gave up
Reinstalled 64 and took out 256. PC won't boot until the stick was seated properly.

There are a few posts in F1 about sticks running at the speed of the slower ram, should be OK.
There are also incidents of only half the total MB being recognised. Suggest you try other makes/suppliers of similarly speced ram - you are not alone. A friend also mentioned I should look for stick with chips on either side.

Me? I was prepared to put up with the increased cost of ram (it used to be approx <$100/256MB) but not if only half is available (this works out to be > 400% expensive than sale price). Will wait for when prices go down again (LOL) and try once more. (No) thanks for the (missing) memories.
Guest (0)
33268 2002-01-29 07:50:00 Yeah Gidday

The most common cause of RAM reading half value (i.e. 128MB instead of 256MB) is the use of single-sided RAM with 8x32MB chips instead of double sided with 16x16MB chips.

It appears to be an addressing problem on older motherboards and changing to double-sided will fix the problem.

I would also put the 256MB in slot 1 and the 64MB in slot 2.

I had similar problems with an A-Trend 5030 Mbd and changing the RAM type plus reorganising provided access to the full RAM complement.

Cheers

Billy 8-{)
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