Ram problems

  • BlueHat
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Post 3+ Months Ago

I have PenII, 350.
i want some explanation of something.
I have installed winxp, then I used 128 ram(133Bus)
and 64 ram of(100Bus).
but the system can read only 64 from each Ram.
so i have only 192.

Why is that?

Thanks.
  • UNFLUX
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Post 3+ Months Ago

we have a hardware forum for these sort of topics ;)
  • BlueHat
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Post 3+ Months Ago

Thanks for the hint :roll:
  • Ragnar78
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Post 3+ Months Ago

Because the frequencies are dffrents and even probably you damaged the 64.

I made the same mistake once...it worked for a week but then the rams i added got 'burned'...
  • ATNO/TW
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Post 3+ Months Ago

I don't get it? You have a 128MB chip and a 64MB chip -- that adds up to 192MB -- so what's the problem? Unless what you're saying is that you're only showing a total of 128MB (64MB from each chip?)

BTW -- I didn't know you could mix a PC100 and a PC133 SDRAM chip.
  • joebert
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Post 3+ Months Ago

If your system is a 133 bus you have to replace that 100 with a 133 plain and simple.

ATNO/TW wrote:
BTW -- I didn't know you could mix a PC100 and a PC133 SDRAM chip.


If you have a 100 bus you can use 133 chips and they will underclock to the 100 bus, just can't do it the other way around.

This comes in handy when you start overclocking, cause you don't stress the ram.
  • BlueHat
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Post 3+ Months Ago

sorry for the mistake unflux,
i meant saying that i have two slot of 128MB ram and one of 64MB and i only receive 192, there is 128MB missing.

Thanks
  • ATNO/TW
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Post 3+ Months Ago

Troubleshoot:

Possible bad chip.
Remove one chip at a time and analyze the results. If you remove one and are left with 64MB the 128 card still in the board is bad. If the one you removed leaves you with 192MB the one you removed is bad.

I still have this nagging thought that it might have to do with your bus speed. With a Pentium II, I have to ask, are you sure 133 is supported? (Especially since what appears to be the original 64MB chip is a 100).
  • joebert
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Post 3+ Months Ago

After ATNOs keen observation and a quick check, a pII 350mhz chip is a 100mhz bus chip. Aslo I found that there is a few chipsets from that time that only support 256MB of of memory. (for instance, 440zx chipset) With ATNOs suggestion try removing the 64 chip and placing the two 128 chips in the first two slots on the motherboard. If this shows up as 256MB you may have one of theese chipsets.
If that is the case you may or may not be able to fix it with a BIOS update (probably not).
My suggestion, find out your chipset model printed on the chipset its' self and look it up on google, or let us know what it is.

EDIT: BTW, the pIII 533 is the first pentium chip with 133mhz bus.
  • BlueHat
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Post 3+ Months Ago

I knew it that my mother board wouldn't support 133Bus, but i thought if i ask i might get some tricks, i mean i thought that u can change some settings in bios and then it might work.

but thanks any way

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