what is the best proc i could use for kt266a?

[maluckey]

Not to mention that in many BIOS, the multiplier will remap if it reads something unworkable. For instance. On a KR7A-133/KX7-333 (KT266a/KT333), 9x in BIOS with a on 13x CPU translates to 17x. If the CPU is set to 13.5, Then 9x in BIOS is remapped to 13x, 9.5x is remapped to 13.5, and 10x is remapped to 14x. There are multipliers as high as 21x that I have mapped, that are available.

These oddities allow many "unsupported" 333 mhz CPU's to run just fine at 266 Mhz without mods.

 

[gryfon]

The BIOS option overrides the default multiplier of the chip, hence a chip that is already set to mutliplier 15x(2400+) will still work in such a board.

You mean "work" on lower multiplier right ?

Not to mention that in many BIOS, the multiplier will remap if it reads something unworkable. For instance. On a KR7A-133/KX7-333 (KT266a/KT333), 9x in BIOS with a on 13x CPU translates to 17x. If the CPU is set to 13.5, Then 9x in BIOS is remapped to 13x, 9.5x is remapped to 13.5, and 10x is remapped to 14x. There are multipliers as high as 21x that I have mapped, that are available.

Geez, i don't know if it's going to be that complicated.
"9x in BIOS with a on 13x CPU translates to 17x..." --> is this mean, multi in bios is 9x, multi on cpu (l5 bridge ?) is 13x, but the resulted multiplier is 17x ? Err, is there a complete list of this remapping thing (bios, L5, result) ?

What i'm planning is, i want to buy an XP 1700+/1800+ and then overclock it to around 2600+ speed, by trying to increase the multiplier first, then when i got the max mhz for the cpu, i'll set the fsb to the max that my mem support (around 150), and adjust the multiplier according to max speed divide by 150 fsb. Is it possible without working the bridge mod ?

sorry i'm a noob ,
thanks.

 

[aka1nas]

If your board will allow multiplier adjustments. In addition to what was mentioned earlier, some boards simply will not allow multi adjustment unless the CPU is unlocked(which is done by modding bridges). I have a biostar kt333 board like this for example.

 

[myocardia]

Originally posted by: gryfon

Geez, i don't know if it's going to be that complicated.
"9x in BIOS with a on 13x CPU translates to 17x..." --> is this mean, multi in bios is 9x, multi on cpu (l5 bridge ?) is 13x, but the resulted multiplier is 17x ? Err, is there a complete list of this remapping thing (bios, L5, result) ?

What i'm planning is, i want to buy an XP 1700+/1800+ and then overclock it to around 2600+ speed, by trying to increase the multiplier first, then when i got the max mhz for the cpu, i'll set the fsb to the max that my mem support (around 150), and adjust the multiplier according to max speed divide by 150 fsb. Is it possible without working the bridge mod ?

sorry i'm a noob ,
thanks.

Gryfon, I don't remember ever sending anybody here, but it definitely seems as if this is where you need to go for help building your computer.

 

[maluckey]

Try this page link

Cut/paint the bridges using white out, and rear window defogger repair solution. It takes ten minutes the first time and less after that. The T-Bred B 1700+ will take a higher multiplier just fine. The Bartons will as well. Find the limit of your RAM, then adjust the multiplier to reach where you want it, based off of that.

Another good CPU choice is the mobile Barton 2600 (edit: 2400+). It's a 266 Mhz procesor, and will OC well without manipulating the multiplier. It has been used sucessfully in many Kt266a/333, and a few others as well.

This doesn't have to be hard. Just do one thing at a time. Start with the limits of the board, then and the RAM. Then worry about the processor speeds.

Good Luck!

Mark.

 

[rogue1979]

Why not try the .13 micron Duron 1.4 GHz? It's $35 shipped and comes with a 14X multiplier. 140-150MHz speeds will get you 2000-2100MHz, no bridge mods necessary. Most KT266A motherboards should run up to 150MHz fsb speeds, pci speeds will be at 37.5MHz which sould still be "safe". Performance will only be 3-4% slower than the Athlon counterpart.

 

[myocardia]

Originally posted by: rogue1979
Why not try the .13 micron Duron 1.4 GHz? It's $35 shipped and comes with a 14X multiplier. 140-150MHz speeds will get you 2000-2100MHz, no bridge mods necessary. Most KT266A motherboards should run up to 150MHz fsb speeds, pci speeds will be at 37.5MHz which sould still be "safe". Performance will only be 3-4% slower than the Athlon counterpart.

Man, Rogue, you're EXTREMELY uninformed, aren't you? First of all, the Applebred Durons have a 133mhz fsb, so he would still not be able to overclock hardly any at all. Secondly, where in the world did you get your figures for performance from?? According to Anandtech, the Athlon XP 2400 beats the 1.6ghz Duron by up to 50%. Here's a second link showing the XP 2400 smoking the Duron. Besides, the 2400 already has a 15x multiplier. That's the highest multi chip that AMD sells, why did you think I recommended it to him?

And to the people that recommended an XP 1700, that would be great if he had PC3200 ram, but he says he can't afford new ram, which, like I said before, means he should buy a 2400, so he can get good performance, without having to do any chip mods. This kid obviously doesn't seem as if he's got the skills to do any kind of modding, and unlike us, he doesn't have the money to buy another chip, when he messes the first one up.

 

[aka1nas]

Originally posted by: gryfon

The BIOS option overrides the default multiplier of the chip, hence a chip that is already set to mutliplier 15x(2400+) will still work in such a board.

You mean "work" on lower multiplier right ?

No, if you leave the boards mutliplier settings to "auto", it will take the default multiplier that the chip gives it, even if it is above 12.5x. If you set it in the BIOS, then that value(which goes up to 12.5x in a board of your's age and chipset), overrides this default value. The default multiplier is determined by open and closed electrical contacts on the surface of the CPU packaging. these are what you would have to mod if you wanted to go that route.

I.E.
You could take a 1700+ t-bred athlonXP and open a few of these electrical contacts with perhaps a sharp knife and change it's original 11x multipler and up it to 15x, which is a 2400+. This is a little tricky to do right and has a lot of potential to mess up your chip, so maybe this isn't the best thing for you to do.

Shuttle's website says that your board supports all the 133FSB procs, including the thortons and applebred durons, so you could go that route if you are short on cash. Otherwise, the 2400+ is your best bet as it is a prety good deal for the performance you get out of it and you won't have to mod anything or overclock your FSB to get that performance out of it.

 

[rogue1979]

Originally posted by: myocardia

Originally posted by: rogue1979
Why not try the .13 micron Duron 1.4 GHz? It's $35 shipped and comes with a 14X multiplier. 140-150MHz speeds will get you 2000-2100MHz, no bridge mods necessary. Most KT266A motherboards should run up to 150MHz fsb speeds, pci speeds will be at 37.5MHz which sould still be "safe". Performance will only be 3-4% slower than the Athlon counterpart.

Man, Rogue, you're EXTREMELY uninformed, aren't you? First of all, the Applebred Durons have a 133mhz fsb, so he would still not be able to overclock hardly any at all. Secondly, where in the world did you get your figures for performance from?? According to Anandtech, the Athlon XP 2400 beats the 1.6ghz Duron by up to 50%. Here's a second link showing the XP 2400 smoking the Duron. Besides, the 2400 already has a 15x multiplier. That's the highest multi chip that AMD sells, why did you think I recommended it to him?

And to the people that recommended an XP 1700, that would be great if he had PC3200 ram, but he says he can't afford new ram, which, like I said before, means he should buy a 2400, so he can get good performance, without having to do any chip mods. This kid obviously doesn't seem as if he's got the skills to do any kind of modding, and unlike us, he doesn't have the money to buy another chip, when he messes the first one up.

OK, I stand corrected on the 133MHz fsb speeds of the applebred Duron, I haven't used one which is unusual for me, the 1700+ is so cheap it makes a better deal for a 166MHz + motherboard. I wrongly assumed the multiplier of 14X would be a good deal for him.

One word of advice though, if you are gonna correct somebody, you better make sure your facts are accurate. Working with the second link that you posted, I don't see 50% better performance from the 2400+ vs the Duron 1.6GHz. First of all, the 2400+ is clocked at 2000MHz, the Duron 1.6GHz obviously at 1600MHz. I clearly said 3 or 4% slower than the Athlon counterpart, which would be a 1900+!

Anyhow, just for entertainment I used the benchmarks you offered. 30%, 8%, 17%, 40%, 24%, 31%, 60%, 29% and 24% is the margin the 2400+ beat the Duron 1.6GHz. Out of the 9 benchmarks that's an average of 29.2%. Now using some very simply math I hope you are still following. The 2400+ is clocked 25% faster than the the Duron 1.6GHz So the 29.2% disadvantage minus the 25% boost in clock speed shows a 3.8% advantage! I believe that falls right in the 3-4% performance difference I originally stated. Any questions?