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Author Topic: Memory madness  (Read 6546 times)

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Offline patrik

Re: Memory madness
« on: September 01, 2004, 10:47:40 PM »
@all:

Does these 128MB HP SIMM problems affect both the 040/PPC and 060/PPC combos? I must add that it would be more likely that the BPPC is the source of these problems than server class SIMMs.

It sounds quite wierd with SIMMs dying from running them in a too high frequency. First of all, SIMMs are not synchronous devices - they are asynchronous devices that arent clocked. The memory-controller waits for the memory to be ready for say a read by waiting a number of clockcycles. This means that if you increase the frequency of those clocks, the memory-controller will wait less time for the memory to be ready. If that time becomes too short it will result in corrupt data, not in a corrupt SIMM. The only thing that should reasonably be able to kill the SIMM is either too high voltage applied to the Vcc, too high voltage applied to the io pins relative to the Vcc or heat.


/Patrik