I was thinking about underclocking my system before I put my new heatsink on. I have a 1200 mhz Tbird and I thought I could underclock it to like 333 and then put my new heatsink on. I figure that if something goes wrong it will have a harder time frying. DOes this sound like it would work?
Underclock
- Thread starter ScottyB
- Start date
first, can you clarify what exactly you're trying to do? are you trying to run heatsinkless? fanless? swap heatsinks while running? or just dont trust your current heatsink?
if it is heatsinkless you want, DO NOT DO IT. you can't.
fanless: if you have a decent heatsink, cut the vcore by .2 or more, and drop the speed about 30%, probably can do it (my 700 does 600, 1.55 vcore fanless)
swap heatsinks while running: see heatsinkless.
dont trust your current heatsink: why? if it is the "crappy" retail one, AMD says the cpu will last 3 years on it, or they'll replace it.
anyway, the lowest multipliers tbirds have is 5.0x, and the slowest bus my mobo does is 90 mhz, giving you 450mhz.
edit: according to a program that gives cpu wattages, a 450mhz tbird on 1.5 vcore puts out 17 watts, which is, for comparison, slightly less than a cheap soldering iron.
edit2: if you just dont trust that you will seat the heatsink right, I guess you could underclock it. I know I have run with my heatsink only half-way on (Tbird 700@700, 1.6vcore) for about 1/2 hour before crashing, but YMMV.
if it is heatsinkless you want, DO NOT DO IT. you can't.
fanless: if you have a decent heatsink, cut the vcore by .2 or more, and drop the speed about 30%, probably can do it (my 700 does 600, 1.55 vcore fanless)
swap heatsinks while running: see heatsinkless.
dont trust your current heatsink: why? if it is the "crappy" retail one, AMD says the cpu will last 3 years on it, or they'll replace it.
anyway, the lowest multipliers tbirds have is 5.0x, and the slowest bus my mobo does is 90 mhz, giving you 450mhz.
edit: according to a program that gives cpu wattages, a 450mhz tbird on 1.5 vcore puts out 17 watts, which is, for comparison, slightly less than a cheap soldering iron.
edit2: if you just dont trust that you will seat the heatsink right, I guess you could underclock it. I know I have run with my heatsink only half-way on (Tbird 700@700, 1.6vcore) for about 1/2 hour before crashing, but YMMV.
I'd like to know what exactly he is trying to do. Are you just not sure if you're gonna install the heatsink correctly?
no, to first reply, I just thought I would put down the speeds before I installed my new one, I just put it down to 500 mhz but it wouldn't boot so I had to erase cmos. I just thought if I installed the new one wrong the cpu would have a better chance of not frying.
yes, johndoe52
yes, johndoe52
I think this is a good idea, should become standard procedure, if it works.
but you have to enter bios quick and check temp for some time.
due to less heat produced the core will heat up slowley, but it will still get too hot in the long run.
so if you boot into windows, you might
overheat your cpu if the HSF is not mounted correctly.
have you tried it?
cAPSlOCK
but you have to enter bios quick and check temp for some time.
due to less heat produced the core will heat up slowley, but it will still get too hot in the long run.
so if you boot into windows, you might
overheat your cpu if the HSF is not mounted correctly.
have you tried it?
cAPSlOCK
Sounds like a good idea to me, if your cpu is already unlocked then go for it. It can't hurt nothing. But the lowest mine will go is 5*100 or 500 mhz, which is half clock speed of normal for me.
It's motherboard specific not Processor, Socket A boards tend to have a minimum of 5x, I'm not sure if KT266A based ones go that low or not
MadRat
Lifer
- Oct 14, 1999
- 11,961
- 278
- 126
It appears that 3X is possible: http://www.beachlink.com/candjac/PaloDecode1.htm
"DURON/TBIRD HOST CLOCK MULTIPLIER SIGNALS DIAGRAM
Note the Duron/Tbird Host Clock Multiplier L to R pattern of 4 consecutive pairs of LO-HI signals feeding the individual L3/L4 bridge circuits. But the Athlon MP/Palomino L to R LO-LO-HI-HI-LO-LO-HI-HI pattern in the diagram below, decoded from 1G and 1.2G Athlon MP bridge settings, (followed by what we believe is the new 5th bit L10 = LO-HI), is different. However, while one bridge of each signal bus's HI/LO pair must always be open and the other closed, each bridge of HI/LO pairs need not be physically next to its complement like the Duron/Tbird LO-HI bridge pairs. They can be located differently as decoded below."
The base multiplier is 3X. The HI/LO signals are for .5X, 1X, 2X, 4X, and 8X multipliers. The Palomino family use a HI/LO signal for 16X. Theoretically then we have multipliers from 3X to 31.5X in increments of .5X settings.
"DURON/TBIRD HOST CLOCK MULTIPLIER SIGNALS DIAGRAM
Note the Duron/Tbird Host Clock Multiplier L to R pattern of 4 consecutive pairs of LO-HI signals feeding the individual L3/L4 bridge circuits. But the Athlon MP/Palomino L to R LO-LO-HI-HI-LO-LO-HI-HI pattern in the diagram below, decoded from 1G and 1.2G Athlon MP bridge settings, (followed by what we believe is the new 5th bit L10 = LO-HI), is different. However, while one bridge of each signal bus's HI/LO pair must always be open and the other closed, each bridge of HI/LO pairs need not be physically next to its complement like the Duron/Tbird LO-HI bridge pairs. They can be located differently as decoded below."
The base multiplier is 3X. The HI/LO signals are for .5X, 1X, 2X, 4X, and 8X multipliers. The Palomino family use a HI/LO signal for 16X. Theoretically then we have multipliers from 3X to 31.5X in increments of .5X settings.
TRENDING THREADS
-
Discussion Zen 5 Speculation (EPYC Turin and Strix Point/Granite Ridge - Ryzen 9000)- Started by DisEnchantment
- Replies: 24K
-
Discussion Intel Meteor, Arrow, Lunar & Panther Lakes Discussion Threads
- Started by Tigerick
- Replies: 19K
-
-
-
Facebook
Twitter