CPU & mobo @ different FSB?

[mb2]

would an unlocked 2600+ t-bred B CPU (default fsb @ 333 aka 166) run ok (but underclocked?) on a motherboard which only supported 266fsb aka 133?

by default, with jumpers set to 266fsb, would it run at 12.5x133= 1666mhz?? (instead of the normal 12.5x166=2083). or would it not run atall?
would it detect the voltage required correctly (ie 1.65v) or would it just go with the 'board/chipset default' (K266) ?

 

[AWhackWhiteBoy]

i use a barton on a old KT266(non-A), the default old CPU voltage is 1.575 so i bumped it to 1.65, set the CPU interface FSB at 166 and raised the multi to 12.5(the motherboards max). runs just peachy

however, unless you already own one,i suggest not buying one just for this. i couldn't get the barton to work in a KT266A mobo i had laying around(which would have been sweet to OC it with since it was geared toward that back in the day and a KT266A is pretty much a first revision KT333). the new bartons won't work in all older motherboards.

 

[gwag]

sure it will if its unlocked.

 

[mb2]

thank you.. sounds good..

ok i dont have it but i'm thinking of the MSI KM2M Combo-L
as then i'd just have to buy a mobo to upgrade an old POS pc so its useable

the board has FSB set by jumpers and no bios multi adjustment..
so would dropping it in with the fsb set to 266 work at 12.5x133 @ 1.575 [i'd imagine this would be enough volts @ that speed]

i could probably change voltage/multi with the wire/socket tricks or whatever, but i'd like to leave that alone for a while and i just want to be sure that the CPU and Mobo will work together!.

 

[AWhackWhiteBoy]

if your BUYING the motherboard and don't already have it,i would never suggest getting an old chipset like that.

for about £40 you could get a shuttle with an Nforce 400 ultra, just not sure if you can find it in the UK.

its $50 at newegg.com

also,if you can't manually set the multi OR FSB in the bios your probably SOL unless you REALLY want to spend the time doing the wire trick.

 

[mb2]

'if your BUYING the motherboard and don't already have it,i would never suggest getting an old chipset like that.'
sure its not great but its either than or a 400mhz celeron.. DDR ram kills the (very low) budget. anyway i was asking if it would work, not for suggestions on mobo please. it will be sufficient power-wise atleast, even if i'd prefer it to be a little more reliable.

'also,if you can't manually set the multi OR FSB in the bios your probably SOL unless you REALLY want to spend the time doing the wire trick.'

you can set the FSB, just with the jumpers rather than in the bios. you can't set the multi in the bios however.
i dont really want to spend time doing the wire trick, but if i absolutely have to then i guess i have to.
i dont mind however running it underclocked, at 12.5x133 (1666mhz).
would it load at 12.5x ?? (detecting CPU multi), or 5x or something? (not detecting, going to default)
i dont know what SOL stands for but i'm guessing its not good.

 

[AWhackWhiteBoy]

sh*t out of luck

the motherboard will probably default to the lowest multipler,whatever it may be. setting the multi would be based on whatever the core can handle,so your going to have to guess a setting and go for it.

 

[mb2]

as i understand it you can change the multi within windows with some programs?
would one of these work with the KT266?

ok so could i have confirmation (a little positivity lol) that the CPU and mobo would definitely work together, *even* if it meant it would load at 5x133 = 666mhz (or whatever lowest multi X 133)

i just dont want to buy if they wont even play together atall.

thank you!

 

[AWhackWhiteBoy]

i never heard of such a program, the new AMD 64s have the ability to throlled the multiplier,as well as laptops with mobile athlon XPs,however these are at hardware levels for the most part. i know the AMD 64 uses drivers but it also has hardware to support it. i really doubt you could do so.

as i said before, my barton worked on one older motherboard,but didn't on another, so if your buying this stuff and don't have it laying around there is a good chance it WON'T work. so i highly suggest against the purchase. my barton worked in a shuttle motherboard,but didn't work in my MSI, which gives you more reason not to make this purchase.

can you just find an older palomino core? at least then you know it will work.

 

[mb2]

i'm getting the CPU for next-to-nothing so not really.
would it work with a T-bred B mobile?
if they work with the t-bred mobiles.. then surely it would work with this right?

the motherboard works with T-breds at 133fsb.. so i dont see why it wouldn't work with an unlocked 166fsb processor just setting the FSB lower??
being as the FSB isn't detected anyway- done by jumpers.

 

[DaNorthface]

you could get a motherboard in newegg refurb for as little as $25

EDIT: I Lied, you can get it for $21 and $1 shipping, 333 fsb

 

[mb2]

its not the cost of the motherboard thats the problem; its the cost of ram. with the SDR motherboard i dont have to buy any ram. i dont live in the US anyway, so i can't use newegg.

 

[mb2]

'the motherboard works with T-breds at 133fsb.. so i dont see why it wouldn't work with an unlocked 166fsb processor just setting the FSB lower??
being as the FSB isn't detected anyway- done by jumpers.'

someone tell me i'm talking sense here and that it would work? i dont see why not??

 

[mb2]

annnnnyyyyyyone?

 

[AWhackWhiteBoy]

i just checked,it seems to be a late model ddr266 motherboard,the one i had troubles with was a first generation ddr266 motherboard. i would think it should work fine since it supports 2600+ cpus,which would have to be either t-bred or thorton.