The advantage of pc100 over 133 memory

I recently got myself 2 128 sticks of pc 133 to replace my 2 sticks of pc 100.

I run my comp at 166 mhz with no trouble at all with the pc 100.
But with the new 133 the comp wouldnt even post boot?
Oh dear I thought, so of i went to the shop to change the stick for a diff manufacture. Still no joy till I realised what was going on.
I could only clock the 133 to 150mhz but found the comp quicker when I put 1 of the pc 100 sticks in with the 2 133's, I was able to then run the comp at 166 again. The pc100 stick must throtle back the 2 133's

So to cut a long story short.

You can over clock more with pc100.

Everyone has their own opinoin. Not to say your wrong or anything but its different for everyone. I'll just stay with saying "Mushkin Rules!"

He's not telling us his opinion!? He's telling us what's happening with his system, sheesh! relax!

Fingers; are U using an Abit BE6-2 by any chance? Cuz I have the same RAM issues as you are experiencing. I have a generic 256MB PC133 333 DIMM, and a 64MB PC100 222 DIMM. Without the PC100 DIMM the PC133 stick the system won't even make it to 125Mhz FSB! With the PC100 stick added, the system boots up at 140Mhz... One other thing is that very rarely I see a BIOS warning "No SPD found in DIMM slot 4" during bootup, but there are only 3 slots on the BE6-II (???). There is never a problem with stability. I'm currently running at a mild 112Mhz 222. Since these are very annoying system quircks I am getting a new (brand) 256MB PC133 222 stick this weekend and am very curious to see if this will make any difference.

i've got my own experiences with this topic, too.
i'm now running the asus cubx (fsb max. 100mhz!) and a P/// 600EB (4.5*133mhz!). my pc100 ram (1*128mb) and the mainboard runs with 133mhz FSB without any problems. it even runs at 150mhz FSB but not that long... i've not tested why my system doesn't run fine but i think it could be the mainboard. but i gonna test this right now...

FSB 150mhz and [email protected] say 1.7 or 1.75.... lets test this...


Clam

P/// 600EB@675

here the timetable:

0:00 - start
4:30 - after i started 3dmark the first crash in the second game
6:30 - i started cs to play against bots
7:30 - hmm... i think it crashed...
9:30 - second try, i started cs again
11:30 - well... ahm... crash
12:00 - vcore 1,7->1,65
13:30 - i started quake2... this should be an easy game
13:32 - crash (IRONY!!!)
14:00 - 150mhz FSB -> 133mhz FSB. end of the test

ok... lets again say that this test has take 14 minutes... not hours!!! just 14 ****ing minutes!! oh. i'm sorry for this strong language.

conclusion: 133mhz FSB fine... 150mhz FSB HORROR! this reminds me on my first windows 95
lets say that my pc100 ram runs fine with 133mhz fsb and lets forget about this test... something doesn't want to run with 150mhz FSB... cpu, ram, mainboard, pci cards (37,whatever mhz).... something...

Clam

I use the msi 815e pro MB.

I must admit when I first changed the memory for a different brand the comp at least got past post boot with just the 2 sticks of pc133 at 166mhz. But that was as far as it would go.

But with out the stick of pc100 to throtle back the pc133 no way can I get to 166mhz.

Call me ignorant but who the hell is Mushkin and what is he ruling?

LOL! Mushkin is a Memory Brand name, and it's supposed to be good quality. Anyway since you're using an 815 chipset, I'm sure the FSB/SDRAM ratio is set to 4:3 so your PC100 stick is actually doing 124 instead of 166. 166 would be impossible otherwise for a 100Mhz stick. Another thing with the 815 is that it cannot take more than 512MB RAM and the slots must be filled in a particular order. I dunno what module size/order precisely but you should look this up cuz this just might have something to do with your problem.