Overclocking 700Mhz Duron

[Mael5trom]

I just finished upgrading my wife's computer from a 300Mhz K6-2 to a Duron 700 I had laying around. I had to buy a new mobo, and choose the Shuttle AK31v3.1 (I know its overkill for the Duron, but it'll let me put a XP in it for the next upgrade round . I have a RivaTNT 16MB video card (also had that), and I put in a stick of 256MB Crucial DDR RAM. What kind of overclocking should I be able to expect from this combo? I want to keep it stable, but speed it up as much as possible. So far I have gotten it running stable (so far) at 904Mhz (8.0x113fsb with 1.7v). It was also stable at 840 and 880 (8x105 and 8x110 both at 1.65v) My question is: should I be able to expect more than 904 and keep pushing it or is that about it for this chip? It was not stable at 931Mhz (7x133fsb @ 1.65v), but I haven't tried increasing the voltage too far yet. I had heard 1.85 is about as high as is safe - is that true or should I keep it lower than that? This is my first O/C project so Im not totally sure what to expect. I am testing my system with SI Sandra burn-in and benchmark tests.

Any help would be appreciated! Thanks,
Mike

PS. Forgot to mention the CPU is running steady at about 35 degrees celcius under load.

 

[JustStarting]

Take it up to 1.75V and see what happens there. Most mobo's have 0.05V built in above the setting in the bios. This means you will probably see 1.8V in Sandra. I've had quite a few Duron 700's, and most will reach 950 without breaking a sweat. If you have a good cooler you will be fine. Temps seem good- the sensor is probably not making good contact with the CPU though. Be sure to try and keep it under 50C. Good luck!!

 

[Bglad]

Raise your front side bus to 133. At 113 you are seriously overclocking your bus. At 133 you won't be. Try for 7x133 for 933 and raise to 1.75v only if you need to. I bet you'll get this with no problem. Given that you are overclocked to 113 now, you may be able to get your fsb up a few ticks over 133, maybe 135, but this will probably be your limit. You will get more real world, usable performance increase by upping the fsb and lowerng the multiplier.

Have you tried for 950? My guess is if you run tests though, you'll get better performance at 133X7 than you will at 100x9.5.

The 700 wasn't as good an overclocker as the 750 and the Durons don't seem to like to reach 1G without some serious tweaking and cooling. Most people have no trouble pushing the duron to 1.85v if your cooling is up to the job. I've done it myself. Problem is that you see diminishing returns for that voltage so I'm not sure its worth it. You will get 95% of your overclock out of that chip with 1.75v and I don't think extra voltage, heat and wear on the chip is worth just a few more mhz.

Of course all chips are a bit different so your mileage may vary.

 

[Junior0579]

How are the PCI/AGP bus speeds determined? If he is seriously OC'ing them at 113, but wouldn't be at 133 why is that?

 

[Bglad]

The bus is running at 33mhz. When you set your fsb to 100, the mobo divides this by 3 to get a 33mhz speed across the pci bus. When you set your fsb to 133 the mobo divides by 4 to get 33 mhz. So at 113 fsb he is running his pci bus at 46mhz but at 133 he would be running the pci bus at 33mhz which is spec.

He has good memory that will likely overclock well. It is more likely that something on the pci bus like a video card or nic will crap out before the memory. So, you should get the most out of your memory system by setting to 133 (if you can) which will not be overclocking the pci bus. Then raise from 133 by single digit increments to get the most you can out of the overclock.

 

[Wuzup101]

<< The bus is running at 33mhz. When you set your fsb to 100, the mobo divides this by 3 to get a 33mhz speed across the pci bus. When you set your fsb to 133 the mobo divides by 4 to get 33 mhz. So at 113 fsb he is running his pci bus at 46mhz but at 133 he would be running the pci bus at 33mhz which is spec.

He has good memory that will likely overclock well. It is more likely that something on the pci bus like a video card or nic will crap out before the memory. So, you should get the most out of your memory system by setting to 133 (if you can) which will not be overclocking the pci bus. Then raise from 133 by single digit increments to get the most you can out of the overclock. >>



Agreed with everything he said...except 113/3 = 37.66666666 .......not 46mhz You would need a 138mhz with a divider of 3 to get 46mhz PCI bus...which most if not all PCI cards can't take.

 

[Bglad]

I stand corrected. My math at midnight leaves something to be desired.

Funny, I thought that fsb sounded like an impossibly high overclock when I typed it but I didn't give it a second thought.

 

[rogue1979]

Your temps are good and so far it looks like your 700 Duron is a fairly strong one. 1.85v is actually mild for a Thunderbird or Spitfire core, crank it up and try for 1000. Put the fsb on 143MHz and see what you got. I would download Prime95 and test cpu stability that way. If your temps stay below the mid 40's under full load, that's fine.