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RAM upgrade

By jimdana1942 ·
Will a 133mhz memory module work in a 100mhz SDRAM DIMM system; I am upgrading from 64 to 128 RAM; I was informed the 133 will work...will it?

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by Tech/Admin In reply to RAM upgrade

It should work, you can usually go slower than rated chip speed. It wont hurt anything to try it-- if it is incompatable the system usually will not boot. If it doesnt work just put the 64 meg module back in. Be careful when handling memory (static).

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by jimdana1942 In reply to RAM upgrade

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by dmiles In reply to RAM upgrade

The 133mhz memory is bacward compatible to 100mhz,insert the faster memory in the first slot and the slower memory is next slot,this will enable the bios to register the faster memeory.

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by jimdana1942 In reply to RAM upgrade

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by Netuser In reply to RAM upgrade

It would work properly but not as 133 mhz as specified. It still working as 100 MHZ but 128 should be faster.

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by jimdana1942 In reply to RAM upgrade

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by TheChas In reply to RAM upgrade

While theoretically, the 133MHz memory will work in a 100MHz buss system, the real question is is your mother board able to work with the structure of the memory chips on the new DIMM.

If your mother board is more than 3 years old, you may run into memory structure conflicts.

I do not know how to predict if a mother board will accept new DIMMs without actually trying them. I have seen old Pentium mother boards have no problem using PC 133 DIMMs, and Pentium II and Super 7 mother boards being very picky as to the chip design and structure on the DIMM.
I have not seen any problems with Athlon mother boards and new DIMMs.

Check what memory the mother board / system manufacture recommends.
You can also check the web sites of the major memory manufactures to find out if your mother board can handle the newer DIMM structure.

Also, there may be a conflict between your old and new memory. So, don't reject a new DIMM without trying it by itself in your board.

At one time, Intel had a white paper on their web site that discussed the different DIMM structures, and why there are compatability issues.

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by jimdana1942 In reply to RAM upgrade

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by DIMM In reply to RAM upgrade

So U Have 64 Mb Pc133 SDRAM 72pin DIMM And U Wanna Put A 128 Block In Or Another 64Block Yes It Should Work Because the Memory module of sd is same as dimm 72pin and the because sdram runs via 133 and your mainboard is 133 then if you get a block ofram it will work correct your been told correct but make sure that you have an extra available dimm slot to put the extra ram the ram must be Pc133 Sdram DIMM to work

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by jimdana1942 In reply to RAM upgrade

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