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Question about Memory

Old 01-05-02, 05:58 AM
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Question about Memory

I was having problems with my system locking up or rebooting quite often and I finally replaced the memory with 2 256mb sticks and its been working fine ever since. Before, I had a 256mb stick, and 2 128mb sticks. One of the 128mb sticks was only pc100 and the other was pc133 (as well as the 256mb stick).

Now that i've made as confusing as possible.. What exactly was the problem? I can't have PC100 and PC133 sticks in at the same time? I thought the newer motherboards allowed for this sort of thing.

Thanks for your time..
Old 01-05-02, 09:00 AM
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Generally, you can have PC100 and PC133 in the same system. The system will just work at the speed of your slowest component. I had them like this in my rig.
While this should not be the cause of your problems, it may have been.

Didn't you try taking out each of the old memory modules at a time and see if your system works? That would possibly show you whether there was a problem with a particular stick. Then try that stick in another system and see if it works...
Old 01-05-02, 10:10 AM
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what motherboard/processor do you have? what clock speed was your system set at? was it overclocked?
Old 01-05-02, 12:44 PM
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Re: Question about Memory

Originally posted by Tanolen
I was having problems with my system locking up or rebooting quite often and I finally replaced the memory with 2 256mb sticks and its been working fine ever since. Before, I had a 256mb stick, and 2 128mb sticks. One of the 128mb sticks was only pc100 and the other was pc133 (as well as the 256mb stick).

Now that i've made as confusing as possible.. What exactly was the problem? I can't have PC100 and PC133 sticks in at the same time? I thought the newer motherboards allowed for this sort of thing.

Thanks for your time..
you can run computers using both pc100 and pc133 ram- here is the kicker:

If you run the FSB at 133 then the pc100 ram is running out of spec and will cause reboots and BSOD and a whole host of problems usually.

also even running all pc133 ram together can cause problems:

if you set memory setting like cas2 then some pc133 ram might not run right even at the FSB 133 they were supposed to work at since they only operate cas 3.

It pays to know more about your ram and what it will do before mixing them in your system. i only use crucial memory now since i know they will run at or even above specs and be stable.

if you answer twikoff's questions we might be able to give you specific reasons for why you had problems.

answer this as well:
1- what type of ram was each module?brand?

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