KT133 chipset MB 1200 or 1400 processor?

[videobruce]

On a KT133 chipset MB (Comtrash, unknown manufacture) that has a Athlon 900, can a 1400 be installed (266 FSB) or would a 1200 be the limit (200FSB which is what is there now)?

 

[Budman]

it should say in the manual.

 

[Maximilian]

No idea, google would tell you probably.

Because its KT133 and the athlons bus was double pumped 133x2=266, i would guess yes.

 

[videobruce]

Originally posted by: Budman
it should say in the manual.

No manual, 0, nothing, zip.............
That's why I said Comtrash.

 

[Brunnis]

KT133 actually only supports 100MHz FSB, if my memory serves me right. KT133A was the one supporting a 133MHz FSB. Your choice is therefore limited to the 100MHz versions of the Athlon CPU. There's still no way to guarantee that they will work, though.

 

[Soulkeeper]

you can run Athlon XP's in them too
well the chipset basically supports any socket A proc
but your motherboard model/bios itself might be an issue as officially they usually don't support XP procs
i used to mod the bridges on my XP's to get them to insane overclocks on a kt133 motherboard

problem is if you have a chip with say a 333/400fsb and the board has a 200fsb and won't let you change the mult(even if it does your likely not able to get a high enough clock mult to get even the standard frequency for an XP chip as the older chipset doesn't map high enough to support stuff over like 12x-14x or so) yur left with a severely underclocked cpu and no recourse
unless you mod the chip (this only worked for sure on an asus a7v for me)


therefore the responsible recommendation would be get a 1.4GHZ or slower thunderbird

good luck

 

[videobruce]

The voltages are different for the XPs' aren't they??

 

[Soulkeeper]

yes you can fry an Athlon XP using the voltages that many would consider safe overclocking voltages on the thunderbirds
also depends if you have a .18u or .13u athlon xp
the .18 would be roughly safe around the same voltages as the thunderbirds
but the .13 i would recommend keeping it under 1.75v

 

[Brunnis]

Originally posted by: videobruce
The voltages are different for the XPs' aren't they??

No, the Athlon Thunderbird and AthlonXP Palomino both ran on 1.75V, so you're all good there. The Thoroughbreds mostly used 1.65V, although a few lower clocked chips were specified at 1.5V. Even so, the Thoroughbred chips definitely handled 1.75V without any trouble. Don't expect to be able to use one on that motherboard of yours, though...

 

[Soulkeeper]

yeah i tend not to remember the default voltages, but what voltages fryed certain cpu's

 

[JB1592]

Originally posted by: videobruce
On a KT133 chipset MB (Comtrash, unknown manufacture) that has a Athlon 900, can a 1400 be installed (266 FSB) or would a 1200 be the limit (200FSB which is what is there now)?

Can you find the FCC ID on it anywhere? Searching for it may help you determine what manufacturer/model it is.

 

[imported_Sincity]

I have an old KT133 ECS that I am still running. It is 133 mhz.

 

[ChiPCGuy]

KT133 was 100Mhz FSB only. If you use an older Athlon, be sure it is either a Thunderbird (first Socket A core) or Palomino core that is using a 100Mhz FSB. Later cores used different voltages. Your motherboard also needs to support the core in question via the BIOS, although it is a good bet it supports Palomino. FYI--The KT133A allowed 133Mhz FSB. Thunderbirds went up to 1.4Ghz, so it can be hard to tell what core you have because there were some cross-over cores of later generations that ALSO used a 100Mhz FSB to allow backward compability with boards that supported them to give buyers upgrade paths. You should be able to research it on the AMD website. Research first, plug processor in later. Better safe than sorry!

 

[ChiPCGuy]

Originally posted by: Sincity
I have an old KT133 ECS that I am still running. It is 133 mhz.

This does not make sense unless ECS is allowing a overclock of the chipset. OR, you modded your board? Yours is a unique situation. The KT133 was designed for 100Mhz.

 

[Stumps]

Originally posted by: ChiPCGuy

Originally posted by: Sincity
I have an old KT133 ECS that I am still running. It is 133 mhz.

This does not make sense unless ECS is allowing a overclock of the chipset. OR, you modded your board? Yours is a unique situation. The KT133 was designed for 100Mhz.

The KT133 only had Offical support for the 100mhz DDR(200Mhz)FSB, but many boards could operate in an overclocked mode for 133mhz DDR(166Mhz)FSB.

to get offical 133mhz DDR(266Mhz) FSB support you needed a mobo with the KT133A chipset.

the highest offical CPU support for the KT133 was the Athlon 1400B (14x100) but these are pretty rare..however a 1400C can be very easily modified to run as a 1400B as long as your mobo supports a 14 or higher multiplier, although IIRC most 1400C were unlocked and didn't require any mods to them.

If you choose to use a 1400 make sure you have a good HSF...they tend to run pretty hot, but they do overclock pretty good, I had one a few years back and had it running at 1666Mhz, same as AXP 2000+, there was no real performance difference between the T-bird@1.66ghz and a AXP 2000+.

 

[Soulkeeper]

the kt133 was hard pressed to overclock the fsb past 110 let alone 133 although it would support pc133 memory
kt133a fixed these issues allowing 133/133 operation
a lot of confussion can arise as often times the motherboard manufacturers might have just updated a kt133 board and dropped in a kt133a chipset without changing the motherboard model name and instead just a revision but if it is doing 133fsb there should be no doubt it is most certainly not the origianl kt133

 

[Assimilator1]

Originally posted by: Soulkeeper
the kt133 was hard pressed to overclock the fsb past 110 let alone 133 although it would support pc133 memory
kt133a fixed these issues allowing 133/133 operation
a lot of confussion can arise as often times the motherboard manufacturers might have just updated a kt133 board and dropped in a kt133a chipset without changing the motherboard model name and instead just a revision but if it is doing 133fsb there should be no doubt it is most certainly not the origianl kt133

Yep ,spot on
Some late Asus A7V's actually had KT133a chipsets ,so other makes probably did that too.

Thunderbirds were not normally unlocked ,though they are easy to mod as the bridges don't have cuts inbetween them.

Without modding CPUs or being able to do 133FSB the Athlon 1400 (100FSB) is the highest you can go.

Btw some motherbrds will allow you to alter the multiplier within windows if it supports the mobile 'multiplyer change on the fly' ability.This can get around the x12.5 multiplyer limit if using a T'bred CPU ('converted' to a mobile) that you want to raise the multiplyer on.
Using 20x100 on Tbred CPUs is relativley common on A7Vs at least.
Actually the problem with multis between x12.5-x16 is only a problem at 133FSB (so KT133a only) but you could use multis x17-x20 without converting to mobile.
On 100FSB multis right upto x20 (& higher?) are fine on A7V-A7V133s & KT7a's ,don't know about your mbrd though videobruce