Need some Duron OC help :)

[culex]

K... my last processor was a celeron and I didn't really care much for overclocking. For this one I do.

Recently bought a Duron 750 with a MSI K7T PRO2 and a Taisol fan.

I'm currently at 100mhz fsb and 9x multiplier (hence 900mhz).

Tried playing Rune and UT... both are stable and fine. Seemed okay in Sandra's benchmarks also.

So I said why the heck not and I've tried for 9.5 multiplier.

It posts... it loads... but JUST before it loads the Windows desktop, I get the Windows Protection Error... fair enough. Second try, still the same. Just for the heck of it, I try 10x multiplier (1000mhz). It will not post. The voltage is at default 1.64 btw... duno what else to set it to. Temperature is at 38C/100F.

Now given those information, am I basically stuck at 900mhz, or will I probably need a better fsb/multiplier/voltage tweaking?
I'm thinking it's these crappy RAM Modules I have in here.

One is a Kingston Valueram PC100 128MB (KGM100x64C2128)
The other is a Mitsubishi PC100 64MB (MH8S64BALD-8)

Wondering if I should ditch these and go for PC133.

Help is appreciated. Thanks.

 

[office boy]

When you Overclock with the multiplier it has NO effect on your RAM. The very first thin you should do is turn up your voltage if you can. 1.8 or 1.85 would be a great place to go to, and you should be able to get that puppy's Mhz quite a bit higher.

BTW that duron in my sig, is at 1.85V

 

[culex]

Woo... turned up the voltage up to 1.7 and it boots fine and is stable at 950

I still wanna hit a gig+ with this one...

I'm a bit worried about the temperature now though.

After a couple of benchmarks and a round at UT, the temperature is now at 41C/105F

I hear the most it should go for Duron is around 45C... but that's still considered overboard.

So I guess voltage might do the trick... just worried about temperature

Gawd this never ends!

 

[office boy]

My Temp is 46-8, Keep GOING
BTW what type of thermal paste are you using?

 

[paulip88]

You should be fine with 1.85 if your Taisol is installed correctly and you have good circulation in your case. If you don't have a decent number of case fans, that may be the culprit.

 

[GaryTcs]

Keep it out of the 50's C and you should be fine. 105f is quite normal, actually kinda on the cool side

 

[office boy]

Just read this from overclockers.com
AMD's specs state that Maximum Die Temperature for CPUs is 90C/194F under 1100 MHz and 95C/203F over 1100 MHz
http://www.overclockers.com/

 

[BadBrad]

Be very careful with this!! The maximum die temp is a measurement at the top of and in direct contact with the die. That is the polished part of the CPU that comes into direct contact with the HSF. The temp at this point is most definitely not the same as the monitored temp you are reading in you BIOS or motherboard monitor software. There are many factors that add error into this reading. So when AMD specifies a design limit, that is not to say that you can go anywhere near that reading as you are not reading the exact same temp. It may be close or it may not, who knows? Unfortunately for us, the MB manufacturers do not give us any information as to how they read these temps. All of the temp sensors I have seen so far measure the temp from the bottom of the CPU. Some use a direct contact thermistor. Others use a PCB mounted device that has to deal with the air gap between it and the bottom of the CPU which needs to have additional compensation. In otherwords...don't even think of going anywhere near that 90 degC!!

 

[office boy]

Good call BadBrad, but it does show that these guy have nothing to worry about with some 50 or even 60 deg temp.

 

[Renob]

Brad just curious how do you know were AMD takes the temp for the cpu???????????

 

[DaddyG]

The maximum temp is not the max that the cpu will operate at without problems. Its the highest temp before the core is likely toast. Many TBIRDS will start to crap out when the temps reach 60c but they come back to life when they cool off.

 

[culex]

Thanks for the inputs.

I had to take off the Taisol today... took me forever since the clips are very sturdy.

Once I took it off I noticed that the pink compound on the Taisol had a little cute square in the middle and some of it BARELY on the core. It's like the compound has been vaporized or something

I'll try higher voltage when I'm trying for 1ghz+.

Thanks for the help!

 

[BadBrad]

Renob...

go to: http://www.amd.com/products/cpg/athlon/techdocs/index.html. Find the techdoc 23794 "AMD Thermal, Mechanical,and Chassis Cooling Design Guide". In there is all the info for HSF vendors to design cooing solutions for AMD TBirds, Durons and Slot A Athlons. The techdoc addresses alot of different issues with cooling AMD Processors as well as provide the Max operating parameters that these CPUs are designed for. AMD specifies that testing of the vendor's HSF design requires drilling an access hole in the base of the HSF, 2mm from the surface that comes in direct contact with the CPU die without altering the contact surface of the HSF. A thermal probe is place in this hole to allow the vendor to accurately measure the resultant temp as closely as possible to the top center of the die under actual operating conditions. Then, using the maximum design operating parameters specified in that techdoc, the HSF vendor can analyze his design to see if he has met AMD's cooling requirements. They also talk about a max internal case temp of 40 DegC. So, you can see that we are talking the absolute limits here.