Reply 220 of 226, by slivercr
Welcome to vogons, d4m3d!
d4m3d wrote on 2021-07-01, 13:18:
... so, i've got the workstation in this config: single 933/133/256 slot1 cpu, dummy in the other slot, dual 128mb 40ns rimms wi […]
so, i've got the workstation in this config: single 933/133/256 slot1 cpu, dummy in the other slot, dual 128mb 40ns rimms with no crimms in the other 2 slots.
it was sold as 'broken (not starting)', but i have figured out it was just the battery so it's now starting, giving the error beeps about the absent memory modules.
i am about to buy some memory now (serial number is 750711-702, so i guess 512mb rims is the way to go), and need a piece of advice - i have read the Hannibal Ram Guide about rimms and basically it says that more rimm modules = more latency (cause rimm uses serial principle of data transfer).
my question is - will using crims in slots 2 and 4 improve latency? i know its a silly one but i dont want to spend extra money on another 2x512 set if dual channel mode does not require you to populate all the slots and there may be even performance hit. 1gb is plenty for win2k.
there is also 40ns vs 45ns performance difference, i could not find any benchmarks anywhere but im just curious if there is any (if or840 even supports 40n timings)
I have not measured the difference in using CRIMMs instead of RIMMs or if it would improve latency in any significant way, so I can't really answer your question. The board does accept 40 ns RIMMs, I use modules with that timing.
I can confirm there are measurable differences between 40 ns vs 45 ns, and also between non-ECC and ECC modules. This is in both synthetics (SiSoft Sandra, AIDA64, 7zip benchmark) and real applications (Quake3).
Keep in mind that, as it was said before, the board may not boot with 512 MB modules right away, so you need to get CRIMMs or another set of small RIMMs (< 256 MB) to boot it and flash the newest BIOS. Supposing you buy a 512 MB set, and a CRIMMs set, you could test the scenario you propose and tell us)
Have fun with the board!