Running Duron on 133(266)MHz FSB

read this one here:
http://www.anandtech.com/showdoc.html?i=1440&p=1

Basically 866 (133x6.5) will give you a nice perfomance boost over 850 (8x100) IF you can get it to work.. IF you have a motherboard that chooses 133 fsb with a jumper and mulitplier in Bios, you may have a problem as the system will try to boot at 8.5x133 until bios kicks in. Your Duron is likely not to take that.

So, if you want to this anyway, you either need a MB that supports multiplier with dipswitches (hardware), or 133 fsb in bios. Or, you can cut your L4 (I think) bridges to configure your duron at 6.5... very tricky, I wouldnt advise you try this. You'd be better of increasing the multiplier to 9+

Btw, next time, get a Duron 600 or 650. Works just fine on a 133 fsb without reducing the multiplier.. I even increased mine to 7 (933 Mhz), and that still works. No cutting required :-))))

---- Owner of the only Dell computer with a AMD chip

Yes, the board has a jumper for 100/133. True that it will be a lot of work changing the bridges... I especially like the fact that I'd have to cut contacts as well as connect others. I'm picturing a dremel tool mounted on a drill press... :-)

Likely what I'll do is search for benchmark results comparing Athlons at the two bus speeds, and see what the boost is like. It's just a very appealing option since the speed should go up quite a bit with no actual overclocking of the core.

<b>

I've been running TBird 700@866 (133x6.5) and it works fine on my A7V133.

Good or Bad have no meaning at all, depends on what your point of view is.

Dont expect anything more than 10% in some benches, 0% in others. I think Aces did a review of the 133 vs 100 Duron. From what I recall, a Duron 800 with 133 fsb would be about as fast as a 850/100.. not that big a deal.

---- Owner of the only Dell computer with a AMD chip

When the first DDR mobos came out I asked someone to run benchmarks for me. I wanted to know if it was worth upgrading the mobo for the faster bus speed. His Duron did not have any trouble running at 133 mhz. Unfortunately (or fortunately for me, since I did not waste any more money), the Duron at 133 mhz did not significant outperform a Duron at 100 mhz (both close to 800 mhz internally, I think) using SDRAM. The gains weren't insignificant but they were not worth replacing a mobo and buy new DDR memory.

What was that person handle. KN... something or other.

I'll update when I find it

<b>Update:</b>

Sorry, I posed the question when the KT133A motherboards came out not the DDR motherboards.

<A HREF="http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=627652#627652" target="_new">Here is the link</A> with those benchmarks. The poster was KN7671. (Thanks again).



<P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 06/06/01 05:19 PM.</EM></FONT></P>

Actually, I got my KT7-RAID running at 133.

I don't overclock it to this setting for normal use, but I was able to get it to boot and run some benchmarks. Anything past 133 and it's a no go. 120 seems to be the highest rock stable setting it will take.