Over Clock Tbird 1.2

[Alan Sr]

I have the Abit KT7A with the 1.2 Tbird,
what is the best and safest way to over clock.
I also have the Hedgehog Heatsink with 38CFM.

[Ridenow]

Who said this was safe?!?!?
The best way to do it is do lots of reseach and find out what worked for others. When you are ready to try it yourself, go slow. Change one setting at a time and only change it one notch at a time. Keep going until you are not stable. If you do have problems, post here, there is usually someone who has seen it or can help figure it out.
Good luck.

[David]

What type of Thunderbird is it?
If it uses a 266FSB you will be looking at 9x133.
If it uses a 200FSB you have 12x100

First increase the FSB. take it up as far as it is stable. (to modify the FSB or multiplier you may need to unlock the L1 bridges, if you do just ask someone about it). When you have it as high as you can get it (110 or 145 probably) start taking the multiplier up until it is unstable. To go any further you may need to increase the voltage or use water cooling. Watch your temps, you don't want to fry a 1.2.

If you need any help, let someone know

[Alan Sr]

Thanks,
One problem I had is when I had the origianl bois I was able to run it at 1400 with no problem, now with the YH update I can't run it at 1300 with out it locking up. I read alot about changing the voltage, but I really have no idea what I'm doing if I get into that.
Also in my book it has recomended combinations of cpu volts and system volts. Should I try to match these or just start trying different ones

[David]

OK some speeds (noones answered my post yet, so I'm getting bored)

133FSB 100FSB

133x9 - 1200 102x12 - 1224
135x9 - 1218 104x12 - 1248
137x9 - 1236 106x12 - 1272
140x9 - 1263 108x12 - 1296
145x9 - 1298 110x12 - 1320
150x9 - 1350 112x12 - 1344

10x140 - 1400 13x110 - 1430
10x145 - 1450 13x112 - 1456
11x140 - 1540 14x110 - 1540
11x145 - 1595 14x112 - 1568

you might get higher

[David]

just experiment with the voltages.
Try not to take the VCore over 1.85volts - it isn't good for the CPU.

Generally the more voltage, the more stable the CPU

[Alan Sr]

[quote]nelly (May 17, 2001 09:18 a.m.):
What type of Thunderbird is it?
If it uses a 266FSB you will be looking at 9x133.
If it uses a 200FSB you have 12x100

First increase the FSB. take it up as far as it is stable. (to modify the FSB or multiplier you may need to unlock the L1 bridges, if you do just ask someone about it). When you have it as high as you can get it (110 or 145 probably) start taking the multiplier up until it is unstable. To go any further you may need to increase the voltage or use water cooling. Watch your temps, you don't want to fry a 1.2.

I have the 266 FSB

[dr.d]

This one is kinda the same problem. It used to run at 1400 stable now it will only do 1212. I even reformatted my c: drive( not that much on it, I just put it together about 2 weeks ago)It still locks when it gets to the desktop. I don't consider it a heat problem because it does it even when I first fire it up. Pulled all cards and reinstalled one at a time. Even left the SB out. I updated the bios to YH and all seemed ok. But maybe it changed a setting somewhere that I can't figure out. I AM totally confused. This cpu was unlocked when I got it. The first time it booted was at 1300. I have cleared my cmos. Thermal silver is put on SPARINGLY with a good credit card. I set my bios according to a guide I found and it really increased my memory benchmarks. WTH is going on?? Believe me, I've screwed enough pcs up and had to fix 'em, I should be able to get something happening .

[Door Knob]

nelly (May 17, 2001 09:18 a.m.):
First increase the FSB. take it up as far as it is stable. (to modify the FSB or multiplier you may need to unlock the L1 bridges, if you do just ask someone about it). When you have it as high as you can get it (110 or 145 probably) start taking the multiplier up until it is unstable. To go any further you may need to increase the voltage or use water cooling. Watch your temps, you don't want to fry a 1.2.


You unlock the multiplier by connecting the L1 bridges. And that allows for the multiplier to be changed. This is not necessary to raise the fsb. And most (if not all) 1.2 TBirds come with the bridges already connected

[Door Knob]

Also with your setup 1.5 x 10 would be a good overclock. The added fsb will increase memory bandwidth and raising the multiplier to 10 will give you some more mhz (going any higher with either will probably leave you unstable). This is a pretty realistic achievement with your setup (not a real risk) and will give you some nice added performance. But always mess around, find out what settings work good for you, and most importantly have some fun.

[pqt]

My system is o/c as so:
Asus A7V133/ Tbird 1.2@1.42 (10.5x135)/256Mb PC133 CAS3@135mHz CAS2-2-2 (generic RAM)

The chip doesn't like ahigher multiplier than 10.5, won't even boot into Windows. I should be able to o/c higher but for the cheap RAM, 135mHz is the max I can achieve for a rock stable system with the CAS2 setting. My HSF is a Vantec, pretty decent but not outstanding performance. May be someday I'll get a Swiftec and better RAM and shoot for more. For now, it's good enuf 4 me

[GotCow]

dr.d (May 18, 2001 09:36 p.m.):
This one is kinda the same problem. It used to run at 1400 stable now it will only do 1212. I even reformatted my c: drive( not that much on it, I just put it together about 2 weeks ago)It still locks when it gets to the desktop. I don't consider it a heat problem because it does it even when I first fire it up. Pulled all cards and reinstalled one at a time. Even left the SB out. I updated the bios to YH and all seemed ok. But maybe it changed a setting somewhere that I can't figure out. I AM totally confused. This cpu was unlocked when I got it. The first time it booted was at 1300. I have cleared my cmos. Thermal silver is put on SPARINGLY with a good credit card. I set my bios according to a guide I found and it really increased my memory benchmarks. WTH is going on?? Believe me, I've screwed enough pcs up and had to fix 'em, I should be able to get something happening .



There is a bug in the YH bios that will lock you up on the window desktop if the multiplier is manually set. Just change the K7 CLK_CTL to optimal instead of default in the bios and all will be well. I fought this prob for days and finally resolved it after going to the many FAQ's and of course HERE. Overclockers.com rules!!

Hope this helps.

[Alan Sr]

Thanks DR.D
I did that and I got her runnin at 1575 now, and only at 38 degrees. I'm thinkin about going from my Hedgehog with 38cfm, to a water cooler, does anyone know how much they cost "ballpark" and how much of a difference they make, I heard alot of bad about them leaving moisture on the chip and shorting it out.