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Misreported memory

By kevg ·
I recently bought 2x 256meg PC133 memory modules.
When I installed them they reported that each was 128megs. I tried in 3 diffrent machines, a P1, P2(400Mhz) and a P3(1Ghz). The 128meg that showed up on each tested out perfect, just that the top 128 did not exist.
I took the offending back to the store just to be told that the specfic make did not like anything below 1Ghz, (fair enough).
I had the shop try it in his machine, a P4(2Ghz) and the thing just went crackers.
The shop was still quite happy to replace.
has anybody expereinced anything like this?

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Misreported memory

by JohnGreer In reply to Misreported memory

Can you get them (the shop) to install them in one of their machines and show you that either module really does have 256MB it?

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Misreported memory

by fred07 In reply to Misreported memory

What density Ram? 2x or 4x
Older Mb's did not recognize over 128 RAM and some not over 64.
By "crackers" did it test at 256 x 2 = 512.
There are so many differences in RAM that mor info would be helpful.
Did the replacement RAM count up okay??

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Misreported memory

by TheChas In reply to Misreported memory

The SDRAM DIMM standard has evolved so much, that it can almost be described as a non-standard.

I suspect that you got a hold of quad density DIMMs. These only work in the newest motherboards.

There are so many variations and limitations on how some motherboards recognize SDRAM, that I recommend ONLY buying memory that is specifically guaranteed to operate in that particular motherboard.
Usually, if you stick with the name brands, you will not have a problem.
(Apacer, Crucial, Kingston,PNY)

I have seen many a DIMM that will not work in a motherboard, yet functions fine in a different brand motherboard.
Likewise, I have seen many DIMMs that will not function in combination with other DIMMs.

Another thing to keep in mind, if you are running Windows 98 or Me, there is a large memory bug that can cause a number of system problems with more than 511MB of RAM installed.
Benchmark test have shown that W98 has the 'optimum' performance with 196MB of RAM.
It actually runs slower with more RAM.

Chas

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by kevg In reply to Misreported memory

Poster rated this answer.

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Misreported memory

by ralphf926 In reply to Misreported memory

I have similar problem running Win98 SE. I have asus k7m mb with 3 memory slots. The first 2 contain 128 mb of sdram pc133. I recently added 256mb pc133 sdram to slot 3 only to find that mb memory mgr only recognizes it as 128mb. I used probe utility that comes with k7m mb and it tells me that slots 1 and 2 contain 128mb double-bank memory and slot 3 128mb single-bank memory. Can I get the 256mb recognized or have I purchased incorrect memory. Anyone know what single-bank and double-bank means?My mb manual says I can install up to 256mb sdram in each slot up to max of 768mb. Can anyone help!

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by kevg In reply to Misreported memory

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