I've tried a couple of times to unlock my 1.3GHz Duron with Morgan Core by pencilling the five L1 bridges but haven't had any success. I've earlier unlocked my 1.0 GHz Thunderbird the same way successfully and run it on my current MSI KT4-V motherboard.

When I try to change the multiplier from 13 to 12 at 100MHz FSB on the Duron without connecting the bridges the computer won't start and even though I've pencilled the five L1 bridges on the Duron the computer still won't start with those setting.

I've tried overclocking by FSB to 110-112 at 1.80v and it runs stable at around 1430-1456, higher then 112 it chrashes within a few minutes at all voltages, even 1.90v. But I thought it might be possible to reach 1500 with multiplier and FSB overclocking. My MB supports up to 1.90v since the output is 0.05v higher then the expected and my last setting in BIOS is 1.85v.

Am I doing something wrong in connecting all the five L1 bridges or isn't it possible to unlock the 1.3GHz Duron.

I'd appreciate any help possible!!!

OK..you need a soft lead pencil...I've read that a 0.5mm mechanical pencil with 2B lead works best.

Carefully run the pencil back & forth several times across each one of the L1 bridges...use a magnifying glass to be sure you've fully bridged the gap & that you haven't cross connected any of the bridges.

That's really all there is to it...

http://www.motherboards.org/articlesd/how-to-guides/41_3.html

http://www.amdworld.co.uk/oc3.htm

you would have to cut one of the L10 and join the other. that will get you multipliers under 13x

666 do you mean I have to cut one of the L10 bridges or is it an alternative to using the L1 bridges to get a lower multiplier.

I still can't get it to unlock. I've tried using a mechanical pencil with 2B lead but that didn't help. And since I'm despret to unlock it I soldered the bridges but it still doesn't work.

I don't understand what's wrong. It's exactly like some other bridge is supposed to be closed or opened.

Because even when I manually set the multiplier to 13x the computer doesn't start up but when I have the multiplier to auto it starts at 13x. This is so weird that the processor doesn't work at all with any manually adjusted multiplier.

Isn't their any other person who has actually
unlocked a Duron 1.3 successfully that could explain how they did it and which bridges other then the L1 are open and closed.

Somebody please help because this is driving me totally nutts.

I don't know if what 666 said is correct or not. I did some searching & haven't been able to come up with an answer. I found this at Tom's Hardware though...read it & weep:

"Overclocking: AMD Puts A Clamp On The Multiplier?

In the routine overclocking tests, we noticed that the multiplier of the Duron 1300 was locked. Even after bridging the L1 contacts, we still weren't able to release the multiplier. We investigated the Duron 1300 together with many of the latest motherboards with the VIA KT266A chipset as well as the SiS 735 chipset. However, the results were always the same: adjusting the multiplier to below 13.0 hampered the bootup process, while CPU settings of 14.0 or 15.0 (pseudo-multipliers) were promptly ignored. In any case, we couldn't tell if this had to do with a hand-picked CPU, or if AMD has begun using a multiplier lock starting with the Duron 1300. So the only way to overclock was to increase the FSB clock speed. In the test, the AMD Duron 1300 ran stably at a maximum of 1438 MHz, using traditional air-cooling."

I know what i said is correct for XP2100+ and higher, but i'm not so sure about Durons. All I know is the 1300 has a 13 multiplier which is the same multiplier as the XP 2100+

666 - I tried all sorts of search terms & came up blank. All I found were posts from people asking the same question..."how do I unlock my 1300 Duron?" & many references about how penciling the L1 bridges does not work. It's possible that what you said about the L10 bridges is true, but I wasn't able to confirm it.

I have a 1200 Duron so I'm all set...LOL!

heres a Athlon XP/ duron bridge guide. http://www.ocinside.de/html/workshop/socketa/socketa_resistors.html look at the L10 while changing the multiplier from 12.5 to 13x

whoops. wrong url

http://www.ocinside.de/html/workshop/socketa/xp_painting.html

Sweet site. Thanks for the URL