Overclocking Thunderbird 800mhz

[Guest]

Can anyone tell me how to connect the L1 bridges without having the fluid overlap onto the adjacent posts? Seems like you would have to have the hands of a surgeon. I tried puting the fluid on the head of a pin.

 

[LTJLover]

Just use a mechanical pencil. It works fine. Helped a friend do it with no problem.

Jon
"Water-Cooled CPU Runner"

 

[Guest]

Thanks again Jon. Is the lead pencil method reasonably permanent? I use heat sink paste, so can I put a piece of tape over the lead to keep it from smearing? How fast can I reasonable expect to overclock my 800mhz chip to?

Thanks!

Greg

P.S. I have a college friend who works for Motorola as a programmer and lives in Schaumberg, his name is Duane Rapp. Do you know him?

 

[LTJLover]

I can understand that the pencil lead (expecially when applied thick) can smear a bit when rubbed. This shouldn't matter though as long as you don't plan on taking the heat sink on and off repeatedly. When those heat sinks are clamped on, they don't move period. I don't understand what "lead" your are referring to with the thermal paste. I need more info on what you are describing with the tape application. I have heard that the 800 Tbirds can be OCed from 100-200 MHz depending on its quality. I'd say you shouldn't expect more than 150MHz though unless you plan to do some voltage modification. The Athlons run at about 1.75V standard and the boards are limited to 1.85V max. You can do some modification to get up to 2.2V or so. As far as your friend goes, he probably works at the Schaumburg campus, and I am at the Arlington Heights campus. I can't say I know him, but there are quite a few Motorola employees up here. I am in the RF division too so don't know many programmers. Good luck with the OCing. Try the bus increase first though as that gives better performance gains.

Jon
"Water-Cooled CPU Runner"

 

[Guest]

Hi Jon,

I realized it was a long shot that you might know my friend, Motorola is a big company.

I've experimented with my bus speed for a while and boot up shows me running at 856 mhz. After that it locks up.

I was just worried that the paste might smear the pencil lead and short circuit the bridges but a piece of tape should keep the paste away from lead on the bridges.

Thanks again, it's a learning experience.

Greg

P.S. How the heck do you water cool a cpu????????????

 

[JOJO]

hey, i just oc'ed my 800->950 (asus a7v)
Just uping the FSB i was only able to get to 880 or something like that.

I connected the L1 bridges with a mechanical pencil and get 950 now with a multiplier of 9.5 (also had to up the voltage to 1.85) but i can't up the FSB now (set at 100) or system becomes unstable....

So i think i'll have to be content with 950
good luck

 

[Guest]

I just overclocked my 800 thunderbird, but for some reason I cant seem to get the multiplier over 8.5, giving me 850. I used the pencil method, so I suppose it has worked fine. Anyone know why I'm stuck at 8.5...I tried upping the voltage using the vid1-4 jumpers, with no luck. The system just won't boot, on connecting the power the fan starts up, but doesnt stop, like normal. What could it be?

Thanks y'all (esp. JOJO!)

 

[LTJLover]

You only need to put the thermal paste on the exposed silicon wafer. The L1 bridges are on the actual CPU package. The thermal grease should never come close to them.

As far as water cooling, instead of using a heatsink with fins that dissipate heat to air, you make a heat sink with copper tubing to dissipate heat to the water. With a pump and heat exchanger, you are good to go. Before you know it, you are running at room temp.

Jon
"Water-Cooled CPU Runner"

 

[Guest]

i am just getting into o/cing guys and i got WCPUID program to do see what i am running at. is this the best program or should i use a different one? but anyways my 800 mhz pentium III runs at only 797 i haven't done anything to it yet cause i want to make sure i know what i am doing first.
can someone explain the multiplier to me? my mulitplier is 6 but people always say something like 8.5 at 850 something like the multiplier times 100? what is the 100 and how come mine is 6 at 797? i don't understand multipliers or how they come up with those numbers thanks guys

 

[LTJLover]

Ok first of all, the cpuid program is good. It is used by all the reviewers so it can't be bad. If you have an Intel CPU, forget about the multiplier. Intel locks their multiplier internally so you can't change it. AMD CPU's are multiplier locked externally so you can unlock them and adjust the multiplier. Basically your CPU speed is determined by the bus speed (speed that your motherboard, RAM, and kind of peripherials) * the CPU clock multiplier. The multiplier only affects the speed at which the CPU processes, but it is still bottlenecked by the bus speed. In order to OC Intel CPUs, you have to adjust the bus speed. Sounds like your CPU runs a bus speed of 133MHz (133MHz * 6 = 800) where as some 800 CPUs run at 100 bus * 8 = 800. By increasing the bus speed, you are in affect increasing your RAM speed, and PCI bus speed which can lead to problems. Usually you can get a little more out of the bus, but not a huge increase. Any more questions let me know.

Jon
"Water-Cooled CPU Runner"

 

[JOJO]

Hey design...

a few questions....

1) what kind of cooling do u have, ie heat sink/fan and what kind of temps are u running?

2) what kind of motherboared?

 

[Guest]

ok thank you LTJLover u are very helpful and i can tell u know alot. i understand that now. so basically when my computer is 800mhz is that the speed of the CPU? i have always said it's the speed of the processor, but is that really the CPU speed or what? u said my bus speed is probably 133 mhz. i know that your bus speed is in terms of mhz the more the better, but can u explain what a FSB is? and what it does. also do u buy at a store "133mhz bus"? what part on my computer that i bought makes it run at that speed?

 

[JOJO]

the bus is built into your motherboard and controlled by the chipset, which is most likely made by VIA

The CPU speed is determined by the internal clock of the cpu (100 Mhz on Athlon) x Multipler
ie, 800 Mhz athlon -> 100Mhz x 8.0 (multiplier)

The FSB, fromt speed bus, is the speed at which your cpu is tied into your system.
The bus on the athlon systems is 100Mhz, Double Data Rate, so effectively 200MHz.

The best ram is pc 133 (pc 150 is also avaqiliable) which you can set in the bios to run at 133Mhz on the bus (which is 200Mhz, so it can handle it)

hope some of this helps

 

[Guest]

ok so when talking about my computer, i have a PIII 800 mhz and it's multiplier is 6. so i was told that means i probably have 133mhz FSB,cause 133 X 6 is about 800? does that make sense. i thought maybe it was FSB speed times multiplier = CPU speed. or is it how u said. if so how can i find my internal clock speed?
one more thing about your FSB definition. what do u mean the speed at which your computer is tied into your system? those are kinda big words could u describe what exactly it ties together so i can get an idea of how it works. also, what does the pc stand for in pc 133 ram, cause i think that is what i might have. thanks all this stuff helps alot for me to better understand this stuff.

 

[JOJO]

umm... i'm too sure about the pIII's (i have an athlon)
but to find out exactly what kind of multiplier and FSB u are running, get the program WCPUID... just do a search for it on the net in yahoo or something.

FSB tying in all your parts.... all information is relayed to and from the cpu through the bus. The pci slots (ie sound cards modems, etc), agp slot, memory, all use the bus to send and receive information to and from the cpu.
Thus the faster the bus, the better the system (usually).

Your ram, which I belive you stated is pc 133, means it runs at 133 Mhz which is good, as it is what your bus speed is capable of handling...

again, check out wcpuid, it's a great program, and gives some good basic information on your cpu

as for what pc stands for? heh, actually i don't know, i'll guess at personal computer


hope this helps

 

[Guest]

Thanks again for the info Jon.

And you'll probably want to add a dose of prayer that the water cooler does not spring a leak

Greg

 

[Guest]

OK, here's a little rundown of my system...ASUS A7V Motherboard, AMD Athlon Thunderbird 800 CPU, PC133 128MB memory (cube), Maxtor HD, LG CD, ASUS 3300 AGP, no sound, generic floppy. Cooler is a titan majesty...CPU generally runs at about 47C at 800, going up to 50C at 850. I used a pencil to connect the L1 bridges, but cannot get the multiplier over 8.5, using the jumpers (setting the FSB to 100). I tried upping the voltage to max 1.85V, using the Vid1-4 jumpers, but that had no effect. I thought about removing the on power up auto check from the Bios, but I decided against removing this probably very valid check by the Motherboard. So what next...I suppose I'm stuck, with 850 max, but I'm keeping it at 800, I dont want to run Probe all the time in case I get heat problems. Still, any ideas as to why this may be?

THANKS.
INFO-Any E-mail about a cool shockwave flash movie in your in-box...DELETE IT!

 

[JOJO]

when u are running at 8.5 multiplier, and the voltage is maxed out, what cpu core voltage are you getting in the bios? (under power management somewhere)

you should be able to get more than 50 Mhz if the voltage is upped to 1.85, so check the bios , or the probe to make sure that it's there.

Also, could be that you need more cooling...(not too likely though) there's lots of people that are running hotter than you though.... (i'm at 33C idle)

But if the voltage is truly at 1.85, then it's probably your chip, not all chips are made equal, and some can be oc'ed higher than others unfortunately.

I've seen people get 1Ghz with an 800 TB, but i can't get mine over 978 (9.5 x 103Mhz)

again, check in the bios to make sure that the voltage jumpers are working and that you really are at 1.85

hope this helps

 

[Guest]

I made it...1000MHZ, and no change of voltage...now I just have to run probe for a while, in case of heat issues.

WOO HOOO!

AMD forever! (and ASUS!)

 

[Guest]

I got to 950, any higher and Windows wouldn't load. What settings did you use? Jumpers or in your BIOS?

Thanks,

Greg

 

[Guest]

I'm using only the jumpers, having disabled jumper free mode. I'm running the fsb at 100 (dips 1-4 set ON). I will see on monday what the other 6 dip settings are, but the multiplier is 10 (10 x 100 = 1000). The voltage is still at the default auto detect setting (vid 1-4 all unchanged). I will check the bios to see what the core is at (I made the changes to my work comp.). In my bios, all I have done is turn off all the checks to see what is on which port, what to load off first etc. I know whats in my system, so I tell the bios myself...saves time on startup, but I'm not sure if it will solve your problem. I also have my CD connected with a separate cable to the ATA66 master, and my HD connected to the ATA100 master. I'm thinking this gives me better performance, but I'm not sure...anyone know? Again I dont expect this has anything to do with your limit...I have heard other people, such as JoJo, are also stuck at 950, but what the hey, its notta lotta difference is it. I still have to watch my system for overheating, and see how stable it will run...I'll keep y'all updated.

PEACE.
DESIGN TEAM.

 

[Guest]

Thanks for the info Design Team. I got to 945 by using a CPU multiplier of 9.0 and fsb 105. This seems to be as high as I can go in Win 98. I would like to alter my ASUS A7V for higher than 1.85 volts. I have seen how to do it by soldering in a resistor on the riser board but mine looks slightly different so I am afraid to try.

Thanks again!

Greg

 

[Guest]

OK, I've checked my Vcore in the bios, it tells me 1.77, which is what I would expect, as I haven't changed the jumpers for that. However, probe is telling me that it is 1.824. So whatever, the system is working fine, no problems so far (touch wood). Running at about 51C idle, so don't think that heat is a problem. BTW I'm using a Titan Majesty cooler, looks like an airplane turbine, but seems to be doing a good job. All in all I am a very happy bunny. I see you have changed the FSB. I'm not sure if that is the wisest move, I understand it is better to leave that at 100, but someone else will be able to clarify that point, I'm sure.

O CHRISTMAS TREE O CHRISTMAS TREE.....

DESIGN TEAM

 

[Guest]

i have my athlon 800 running at 1000 !! i have an abit KT7 RAID motherboard. i left the voltage at 1.75 which seems to be sufficient for a stable system. 1050 gets unstable and changing the fsb doesn't work at all.
i used the pencil trick, and it works ok. But how do you get thermal paste near the L1 bridges? the cpu core is 1 mm higher that the rest of the cpu, co you only apply the thermal paste there. or did you put a thick layer of this paste allover the cpu?
i use a coolermaster copper cooler with a second fan mounted on top of it. it runs at 30 degrees C now, and gets 50 degrees C maximum while encoding a DIVX movie.

 

[Guest]

use the pencil trick..
i used a normal HB refillable pancil, make sure that the "bridges" do not make contact with eachother, but also make sure the lines you "draw" are thick enough. i didn't put tape over it, and it still works.