Duron 800 @133MHz?

[Digitalis]

I am VERY new at this, so please be patient with me, I have a Duron 800 on a Gigabyte GA-7ZM mobo(VIA KT-133).

At the moment it is running "As Intended"(I believe) at FSB 100MHz. I understand that my chip could run quicker, however, I don't understand how. Is it just a case of changing the clock settings on the dipswitch?...or is there more involved?

I also understand that, if any of these settings are modified, then cooling could be a problem, at the moment, my chip runs 36º idle(measurement taken from BIOS-hardware monitor).

At the moment, all I wish to do is run my chip at FSB 133MHz, this is just a case of swithing from 100MHz on the dipswitch, I hope? any further clocking would be attempted after lots of research, would my fan be up to the job?

Thnx

[Tiger]

Ideally you need to unlock the L1 bridges so that the multiplier can be used in conjunction with the FSB. For details on how to do this go and look in the beginners section.
At the moment you are running at 8x100=800. There are obviously a lot of permeables and combinations to run at a higher speed. If you want a 10% oc you can up your FSB to 110 and this will give you 880.
In order to run at 133 you would need RAM to support this. If you currently have PC100 RAM it may not support 133.
In order to get oc results cooling is a major determining factor.
I am not sure of the facilities in your BIOS.
*edit I see it's a KT133. It will not support 133Mhz.

[Digitalis]

Ok Tiger, thanx for your time, I'll be looking at the beginners section soon, just one last question if I may:

I have been asked to build a pc for a mate(!!!!!!!silly boy), he's getting a Duron 850, but not sure about the Mobo, it's either going to be GA-7MMH (Pro Savage KM133A chipset), or a GA-7VTX-E (VIA KT266A chipset) both from Gigabyte, we won't know which one it'll be until he takes delivery of it. His Memory is going to be PC133, could you tell me what you think would be the default(unclocked) FSB speed should be for this chip?

Ta!

[Tiger]

The default will be 8.5x100. All Durons default to100. To use them at 133 then you must have a multiplier function because it is unlikely that you will get to post at 8.5x133 initially. So at 133 the multiplier would have to be set at 6.5. 6.5x133=865
Once you start this oc game you are going to get hooked. I would suggest that you start looking for a mobo that you can do things with. The Abit mobo's are the most popular. I have been very happy with the MSI that I have. The D-LED function is really useful.

[The Coolest]

Most durons will run at 133FSB but most likely if its a 850, in most cases it won't run at 133xdefault multi (x8.5 = 1130.5MHz) right away, so unlocking must be made. But after u burn in, mod the case maybe for an intake fans and stuff it maybe will be possible...
I'm not sure if a PC-133 RAM will work on DDR board.

*EDIT*: I'm using ASUS mobos I like them very much, they are OCer friendly too. I heard good things about Abit also.

[Digitalis]

ok, thanx man, I have been reading up, god my brain is getting fried, think I'll have to take a break soon.

I hope I end up understanding even half of what I've read, if I do, I'll be twice as dangerous as I am now.Cheers

[flounder43]

My Duron 750 runs nice and stable at 133 fsb, but I needed to raise the voltage.

[Wa11y]

Originally posted by Digitalis
(VIA KT-133)

You = Screwed. According to Gigabyte (I have their 7ZX board with the same chipset), the KT-133 only supports the 100MHz FSB. The KT-133A chipset will run at 133MHz, but you don't have the A version, and neither do I. i can usually squeez about 10MHz or so out of the FSB, and get about 60-80MHz increase. I don't know what other features your mobo offers for overclocking, so you might be able to increase the multiplier.

[flounder43]

Originally posted by Wa11y


You = Screwed. According to Gigabyte (I have their 7ZX board with the same chipset), the KT-133 only supports the 100MHz FSB. The KT-133A chipset will run at 133MHz, but you don't have the A version, and neither do I. i can usually squeez about 10MHz or so out of the FSB, and get about 60-80MHz increase. I don't know what other features your mobo offers for overclocking, so you might be able to increase the multiplier.

I have an older MSI mobo with KT133. It allows me to overclock up to 110 fsb , but that is it. I have read that this is sort of a limit with regard to this chipset.

[jbslow]

Duron are awesome overclockers and quite a few that I've seen will do 133fsb without to much trouble usually the limitations are set by other components (cheep ram , mobo , psu , heat , video card in no paticular order) you name it and it can hold you back you are always better off with quality parts if you expect to overclock much.

Right now I have a Duron 800@1058 (HSF Swiftec MCX370) on a Epox 8k7a w/ crucial DDR and a Sparkle 300w psu the only thing holding me from running @ 151x7 is my cheap @@s video card if I up the fsb much more the video gets all scibby at one point my screen was all blue event the bios were blue so I had to drop back down to 141 x 7.5 and everything is running smooth now.

[LinkStatic]

Originally posted by Tiger
The default will be 8.5x100. All Durons default to100. To use them at 133 then you must have a multiplier function because it is unlikely that you will get to post at 8.5x133 initially. So at 133 the multiplier would have to be set at 6.5. 6.5x133=865
Once you start this oc game you are going to get hooked. I would suggest that you start looking for a mobo that you can do things with. The Abit mobo's are the most popular. I have been very happy with the MSI that I have. The D-LED function is really useful.

To summarize things up:

By doing the above process, you can surely make your Duron boot at 133Mhz FSb, but with a KT133A chipset not with your current KT133. ;)

[Tiger]

Originally posted by LinkStatic


To summarize things up:

By doing the above process, you can surely make your Duron boot at 133Mhz FSb, but with a KT133A chipset not with your current KT133. ;)
You got it in 1. The KT133 chipset seldom exceeds 115 FSB and most won't exceed 110. Having said that there are still possibilities by using higher multipliers. If you have 0.5 increments then you are in there with a shout. This chipset will not produce the overall performance of the KT133A because the memory won't interleave and the comms between the CPU and memory are limited by the 100 FSB.

[Digitalis]

I think I have some idea of what you mean by 8.5X100, the fsb is the "100" and the "multipier" setting is 8.5 right? So, am I right in assuming that the multiplier "multiplied" by the fsb has to equal the chip rating?(850MHz) I've been checking out my mobo handbook, and I think the multipier on mine is set automatically, as the only setting I can find is the dipswitch for the fsb, is this right?

[juliendogg]

okay, here's my 2 cents hope it helps. i have a gigabyte board with kt133 chipset. there are dipswithces there to control fsb but no multiplier control. you are correct, it's set auto. now the sh**** thing is that the dipswitches are worthless. my board would only boot at 100 fsb. any thing else wouldn't post. remember if you have this problem hold the "insert" key while power up and you won't have to clear cmos.
good news: even though i couldn't post at any other than default using the switches i could use easytune (software fsb program from gigabyte) and run at 115 completely stable. that's the best overclock you can get with that board. i did alot of reading and it seems it was an attempt from amd to limit overclocking and it's not (at least on my board) a chipset limitation but rather a limitation of the pll......

good luck.
and my advice?...............

shuttle ak31
good cheap overclocker....

[Digitalis]

ok, thanks people, you are all very helpfull, but I think I'm a little out of my depth at the moment, I'm going to go away and study this now, I'll probably be back with more questions in a week or two, see you then!!!!!

Cheers.

[lennytiger]

Durons are good ocers make sure you change the multiplier as well you may need to bridge the L1's and the do the multiplier as it will most probably be multiplier locked