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More memory slows system

By mikemay ·
I've got a co-worker ruunning an AMD K6-III 400 clone system at home
that has produced some unusual results when adding memory. He has
tried a number of benchmark and system mark tests, but all produce
the same results. When he has 32 Megs of RAM installed, the system
benchmarks normal, but when he adds more RAM, it slows down.
He has tried different memory, different combinations or RAM, and
even a CPU change to AMD K6-II 450, always producing the same
"more RAM, lower benchmarks". He has even gotten the same results
using two alternate motherboards. What could we be dealing with here?

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More memory slows system

by Gregory W. Smith In reply to More memory slows system

I suspect you're dealing with Windows 95! Also you may get better results manually sizing & defragging the pagefile.

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More memory slows system

by mikemay In reply to More memory slows system

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by qhcomputingny In reply to More memory slows system

To me it looks like your friend has the wrong type of ram installed. I would check that first. It doesn't seem right that the ram that is made for the computer would slow it down. Seems almost impossible.
Always double-check.

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More memory slows system

by mikemay In reply to More memory slows system

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by Bill Cassada In reply to More memory slows system

Is the pagefile a fixed size? If so, let Windows manage it instead. Also, on some systems more memory causes a slowdown due to cache problems. This is usually around 128mb or so depending on the motherboard. Your cache could be disabled in BIOS too. Is the ram PC100 or slower? Too many variables to narrow it down for sure without more information. Let me know what happens.

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More memory slows system

by mikemay In reply to More memory slows system

Seems that his Motherboard is not
quite up to the task, and the CPU excedes the MB limits.

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More memory slows system

by 9878445 In reply to More memory slows system

The problem is not with the ram. Its either the architecture of the machine, or the operating system. Being that you tried different ammounts and types of ram I suspect its not the architecture. Windows 95 95b and 95c and some instances of windows 98. Windows 9x before win 98 SE does not manage memory well. you could load himem.sys and emm386.exe in your config.sys file and set the swap file to twice the size of your physical ram. run a defrag and scandisk on the machine and that should help. If it doesnt you might upgrade to windows 98 se or windows 2000 (win 2k has a service pack out btw)

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More memory slows system

by mikemay In reply to More memory slows system

Turns out that the second MB he tried was of the same marginal quality as his original board. The MB has a CPU speed limit of AMD K6-II and revs out at 400 Mhz. I am certain now that the K6-III 450 was beyond the MB's ability to effeciently manage.

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More memory slows system

by jyimcse In reply to More memory slows system

I agree about the type of RAM. Check your motherboard documentation regarding the type of RAM to use. ECC, parity, non-parity, 8ns, 10ns, EDO, PC100, etc. Also, some motherboards have strict rules on with banks to use and what combinations when adding RAM.

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More memory slows system

by mikemay In reply to More memory slows system

Sorry, RAM wasn't the issue.

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