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Is it possible turn your $50 tbred 133fsb into the 166fsb B34$']['?

T

tbrooks40

Golden Member
i have had this article i planned on reading thoroughly and never did. now that Newegg got their hands on some affordable tbreds B's i plan on reading this thing TONIGHT! i also thought i should run this past some of you more knowledgeable OCers to see if its even worth getting excited about. here's a snip...

Hardware: AMD Athlon XP Mods for Fsb of 166Mhz and 220MHz
Posted on Tuesday, December 31 @ 13:14:23 CET by sensemann

Modifying A 133 Fsb T-bred B Into 166 Fsb
We mentioned earlier that there differences between Barton and TBred-B in terms of their L12 bridges. The difference can also be seen with the Athlon XP 2700+ and 2800+, which share a 166MHz FSB. Would it be possible to go straight to a 166MHz FSB by changing the L12 bridges? We decided to test this with a TBred-B Athlon XP 2200+....

To reconnect the two severed L12 bridges, we will use the same method used to unlock the multiplier. Apply correction fluid to the gap in the second bridge from the right (the bridge we will attempt to connect), then tape the adjacent bridges to prevent short-circuiting. Then connect the bridges using a conductive silver pen. PC booted and the BIOS quite clearly shows a 166MHz FSB. A simple L12 connection to unlock 166MHz FSB speeds seems to be well worth the effort ? if you choose to unlock the multiplier, unlock this higher FSB setting as well to give a significant performance boost.

Modifying A 133 Fsb T-bred B Into 166 Fsb

...this seems to be easy enough but it this wasn't exactly a breeze as this next snippet suggests...

Possible Solution for Running High FSB
On my 2700 and other new chips, they ran cut-connected-connected-connected. These bridges set the default FSB, with the former being 133, and the latter being 166. To test whether this affected the chip being able to run a high FSB in this board, I connected the third L12 bridge (one away from the "L12") on Aceman's 2200 - This would in effect make it look like a new XP2800 (166x13.5). We began testing and the chip was defaulting to a 166 FSB.

Possible Solution for Running High FSB

Source | neowin

...i wonder if the high fsb issue is just an issue for the higher clocked tbreds B's (i.e. 2600+, 2700+, etc)? well, those of us who ordered the 1700+ tbred B's (thanx to CHJF) today should hope so b/c if this turns out to be the case and the 1700+'s do run problem free with a high fsb along with the 166 clock - all i can say is D4MN that would be sooooooo schweeeet - especially for 50 bux!

anyways, i don't pretend to be a great overclocker and i know most of you diehards have probably happened across this already so please enlighten us fair weather oc'ers 🙂

I FIRST SAW THIS ARTICLE ON www.Techconnect.nl... http://www.techconnect.nl/modules.php?name=News&file=article&sid=1449
 
Hi tbrooks40

Yesterday I picked up a T-Bred 1800+. At first I was intending to buy a 2100+ instead. But when I looked a the CPU itself, I noticed it was a regular palomino. So I instead got the 1800+ as it was the fastest T-Bred chip they had, but slower than the 2400's (they're too expensive :/).

The codes are my CPU are: AXDA1800DLT3C AIUGA

My System spec are as follows:
Abit AT7 MAX
Samsung PC2700 256mb

First booting up the processor my FSB was at 133. Right away I just went all out. I lowered the multiplier by 1 from 11.5 to 10.5 to see if it was factory unlocked. Since I have heard about it here. Saved BIOS setting and rebooted. On POST, my CPU was at 1396MHz. This confirmed that it was indeed unlocked by default. So I got into the SoftMenu and set the FSB to 166, and voltage to 1.75v (My motherboard won't let me go any higher). On POST, 1743MHz. Every was fine, I'm able to boot into windows. I ran Prime95 for 15 mins and it was fine.

I'm not sure if mine is a T-Bred B or not. Maybe someone can confirm this.

I'm still playing around with the CPU. Trying to get the highest overclock. I've hit 1.9ghz with cpu earlier but it wasn't stable on Prime95. It reboot my comp after about 10mins. The CPU is suprisingly cool tho. Ilde at 43C. Compared to my previous Duron 650 which I had running at 870mhz had a temp of 41C idle. I'm using a Thermalright AX-7 btw.

Hope some of this answers your questions.
 

can someone explain the point of doing this? I thought tbreds were totally unlocked on most recent motherboards?
 
Originally posted by: AznBoi36
Hi tbrooks40

Yesterday I picked up a T-Bred 1800+. At first I was intending to buy a 2100+ instead. But when I looked a the CPU itself, I noticed it was a regular palomino. So I instead got the 1800+ as it was the fastest T-Bred chip they had, but slower than the 2400's (they're too expensive :/).

The codes are my CPU are: AXDA1800DLT3C AIUGA

My System spec are as follows:
Abit AT7 MAX
Samsung PC2700 256mb

First booting up the processor my FSB was at 133. Right away I just went all out. I lowered the multiplier by 1 from 11.5 to 10.5 to see if it was factory unlocked. Since I have heard about it here. Saved BIOS setting and rebooted. On POST, my CPU was at 1396MHz. This confirmed that it was indeed unlocked by default. So I got into the SoftMenu and set the FSB to 166, and voltage to 1.75v (My motherboard won't let me go any higher). On POST, 1743MHz. Every was fine, I'm able to boot into windows. I ran Prime95 for 15 mins and it was fine.

I'm not sure if mine is a T-Bred B or not. Maybe someone can confirm this.

I'm still playing around with the CPU. Trying to get the highest overclock. I've hit 1.9ghz with cpu earlier but it wasn't stable on Prime95. It reboot my comp after about 10mins. The CPU is suprisingly cool tho. Ilde at 43C. Compared to my previous Duron 650 which I had running at 870mhz had a temp of 41C idle. I'm using a Thermalright AX-7 btw.

Hope some of this answers your questions.
Click to expand...

thanx Azn, i think there is more to this than what it seems guys as this seems to have taken off in o/c forums all over. i was asking the same question as many as to why go thru all of these changes when you can simply change the fsb to 166 in the bios? again i am not sure at all what the benefits are exactly but it sure seems there like some stability issues have been addressed in a few instances that i have read so far. also, everything seems to revolve around that L12 bridge.

it's pretty confusing because different people have used it in different situations to achieve different goals. these guys were not able to get their fsb over a certain speed (166fsb) i think it was, and when they cut the third L12 bridge they were able to run their nforce (NF7 i think) at and beyond 200FSB+ stable. go figure. as i mentioned earlier i am jsut now reading this stuff tonight so you all know as much as i do. this particular situation seemed to be more of a compatability issue with this board (like something a new bios would fix) but there seems to be other situations where this mod the key.
 
quick question...

what's the difference between the Barton and Tbred B cpu's? the Barton has the 512 Cache, but is that it?
 
Originally posted by: tbrooks40
quick question...

what's the difference between the Barton and Tbred B cpu's? the Barton has the 512 Cache, but is that it?
Click to expand...

barton is the 512kb cache versions of the athlon xp chips (not out.. yet...) all other amd athlon xp's are 256kb l2

tbred-b are just a higher stepping (this higher stepping is needed to achieve higher speeds on amd's part)

tbred-a's can only go up to 2200+ (this is the fastest official tbred-a for amd)went
tbred-b's have gone up to 2800+ (faster later)

its basically like pentium III's cc0 and cd0 (cc0's only went up to 1ghz, where as cd0's up to 1.2ghz)

technically, since tbred-b's can go so high, if you buy a low-end tbred-b (like the elusive 1700+'s that are showing up)
you should be able to overclock it from 133mhz fsb to 166mhz fsb with little effort
 
On my A7V333, turning my Palomino into a 166MHz beast involved setting the FSB to 166MHz and bumping the core voltage 0.025 volts. 1600+ @ 1750MHz, easy as pie.
 
Originally posted by: AkumaX
quick question...

what's the difference between the Barton and Tbred B cpu's? the Barton has the 512 Cache, but is that it?
Click to expand...

barton is the 512kb cache versions of the athlon xp chips (not out.. yet...) all other amd athlon xp's are 256kb l2

tbred-b are just a higher stepping (this higher stepping is needed to achieve higher speeds on amd's part)

tbred-a's can only go up to 2200+ (this is the fastest official tbred-a for amd)went
tbred-b's have gone up to 2800+ (faster later)

its basically like pentium III's cc0 and cd0 (cc0's only went up to 1ghz, where as cd0's up to 1.2ghz)

technically, since tbred-b's can go so high, if you buy a low-end tbred-b (like the elusive 1700+'s that are showing up)
you should be able to overclock it from 133mhz fsb to 166mhz fsb with little effort[/quote]

thanx m8... i am looking for an article now that will hopefully shed some light on what i think will be the big difference. i will check back tomorrow.

mechBgon, this is what i thought as well but i believe there is more to it than that. well, when i first foud ghis article i was saying the same thing but there i a performance difference as far a the throughput on the chip - i think. i will post back later tomorrow when i find it - need sleep.

oh yeah, does anyone know of any good translation programs? i have read few articles regarding ths mod and a couple of them referenced this foreign article.
 
Originally posted by: mechBgon
On my A7V333, turning my Palomino into a 166MHz beast involved setting the FSB to 166MHz and bumping the core voltage 0.025 volts. 1600+ @ 1750MHz, easy as pie.
Click to expand...

what you guys are failling to realize is the tbred b chip itself is supposed to have the new 333 bus enabled. i am not talking about your memory throughput but the cpu throughput. if these newegg 1700+ tbreds are infact tbred b's then they should be capable of the 333 bandwidth which would yeild far better performance than just upping your fsb.
 
Originally posted by: tbrooks40
Originally posted by: mechBgon
On my A7V333, turning my Palomino into a 166MHz beast involved setting the FSB to 166MHz and bumping the core voltage 0.025 volts. 1600+ @ 1750MHz, easy as pie.
Click to expand...

what you guys are failling to realize is the tbred b chip itself is supposed to have the new 333 bus enabled. i am not talking about your memory throughput but the cpu throughput. if these newegg 1700+ tbreds are infact tbred b's then they should be capable of the 333 bandwidth which would yeild far better performance than just upping your fsb.
Click to expand...
I think you're mistaken. The changes that make the B's different had to do with reducing EMI within the core and increasing its clockspeed headroom, which they did successfully. The functionality of the core is unchanged.
 
so why are there distinctions made between the newer tbreds that have the 333mhz throughput and the older one that cant? there would have to be a difference somewhere as the 333mhz tbreds have much higher performance.
 
tbrooks,

The Tbred B is just an updated version of the chip. Since AMD is switching their high end chips to the 333 (166xddr) FSB in order to increase performance + keep up with the multipliers, they are using the the Tbred B's to do this since its the only chip that can run the 2700+ - 3000+ range. It has nothing to do with the chip itself. Hell, I can take an 1ghz athlon and run it a 166 FSB x 6mult and it will work fine.

foxkm
 
I dont' see any difference on doing that mod or just upping the fsb to 166...

and on that Abit NFS-7 board, I heard totally different thing, this dude's 2700+ wouldn't go up fsb well and always be failing, so he checked out his old 1900+ and saw the l12 bridge was different so he cut the 2700 bridge to the same as the 1900 and it turn the 2700+ to default 133fsb and then he got it over 220 FSB, b4 he couldn't get to 180 i don't think.
 
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