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Will 750 Duron work in a 266FSB mobo?

R

RadioactiveCPU

Banned
If i were to experiment with overclocking sometime soon and i wanted to try it on a cheap Duron instead of my 1.333GHz thlon, would the Duron work in the 266 PC2100 motherboard? I assume it will, but it will just have a 100MHZ bus correct? Any potential danger i should be worried about (frying my mobo isn't really a threat because it's hard to do) but i mean will the Duron screw up and applications and all or will it all work fine? Check out my rig and let me know. please? haha thanks,
 
It will work fine, but you'll want to set the 100/133 jumper on your board to 100. Otherwise it will boot up with an FSB of 133, overclocking your Duron 33% right off the bat, which the chip may not be able to handle. From there you'll want to take it up in small increments on the FSB, and maybe also changing the multiplier on the chip.

Good luck! 😀
 
Could i just clear the CMOS and then boot it up, resetting the FSB? Also, should i do my voltage penciling prior to attaching the fan? How hard is it to pencil in and does it stay? But windows will still work fine right?

EDIT: Also when you say change the multiplier, what is a good setting for teh Duron 750? (multiplier/FSB?) Should i just set the Multiplier and voltage then toss the fan on? Also, should i max out the voltage on the Duron, i want to get the speed of the chip pretty high. thanks
 
750 Duron just might be good enough to boot at 1ghz. 🙂

Make sure you got a good heatsink & give it more volts.
 
There should be a physical jumper on your motherboard to go from 100MHz. FSB to 133MHz.. You will need to change this jumper in order to set your FSB down to 100MHz.. Simply clearing the CMOS won't do it since the BIOS will just read the jumper again and reset the FSB to 133MHz..

As for the pencil, yeah it works fine. I've got a penciled Duron that's been running fine for the past 4 months or so.

Why do you need to tweak the voltage? That's usually reserved as a kind of "when all else fails" solution. Don't do it unless you need to. Most boards have some kind of voltage adjustment on the motherboard itself so you don't have to do it on the chip. What kind of motherboard do you have?

A good setting for your CPU is the maximum it can handle. 😉 Seriously, though, unlock your chip by connecting the L1 bridges, then toss it in the board and put your fan on. Then slowly raise your multiplier one step and see how stable your system is. If it's stable, then raise it another notch. Once you get instability, lower the multiplier back down one step and stick with it.

This is, of course, assuming that your board has multiplier adjustments on it. If it doesn't, then you're screwed.

Nick
 
I am running the Giga-byte GA-7DX mobo. It has multiplier adjustments in the bios, not on the board in these increments(i believe):

133, 134, 135, 137, 141, 145, 149

that's when it's set to 133. at 100, the manual says:

100 ,102, 104, 108, 112, 116, 118

so i guess i would have to set a multiplier. what should i set a multiplier on the chip for? Like say on an 800mhz Duron?
 
800 would be 8 * 107

Start at 7.5 * 100 (defult). THen either unlock proc and go up to 8 * 100, or do FSB at 107 * 8.
 
Ok well i'm not all that familiar with actually physically messing around with the CPU, so where can i read about unlocking, setting the voltage adn the FSB on the motherboard etc?
 
I've overclocked my 750 duron to 900mhz using 6x multiplier and 150fsb.

Closed all L1 bridges and L7 bridges and changed multiplier to 7x before I could boot to 933mhz.

My chip couldn't boot @ 1000mhz.

Multiplier Settings

It's really easy to change 7.5x multiplier to 7x. You just connect the first bridge in L6
 
It's better to run at a higher bus speed and a lower multiplier setting. The higher bus speed speeds up the whole system. I would suggest closing all the L1 bridges and the first L6 bridge. This way, it should boot at the 133Mhz bus speed (if it doesn't, lower the multiplier on the chip further). If you simply connect the L1 bridges, it will try to boot at 133x7.5=1Ghz. It MIGHT work this way, but it may not even POST.
 
I see the multiplier settings, but what exactly does the whole 0:3, 0:1 mean? I'm not too familiar with it. Also, when you say just change multipliers blah blah, do you do this without attaching a fan? or what if i attached a fan and all and it screwed up, wouldn't i have to detach it and keep penciling things in and all? I am on the GA-7DX board, so i can only change the fsb frequency selection in the BIOS. is there anything else i am missing?

Would i, to start, say set an 800MHz Duron to 8x multiplier and det teh DIPs on the MB to 100MHZ, assuming that would be 800MHZ. so i could, technically set a 7x multiplier and a 150mhz fsb with my bios, it would run at 1050 correct? OR am i just a moron and doing this all wrong? IS there a guide to ocing Duron's that explains it ALL(unlocking, connecting bridges)? Thanks
 
There's a bug with via kt133a boards.

It checks the multiplier first before you can change it in you bios. Anandtech had a article.

Just follow what I posted earlier and you will boot @ 133fsb.
 
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