View Full Version : ragejg's ongoing kt266a (GA-7VTXE+) mod!!

12-27-02, 06:54 AM
Well, I started on the evolution of my beloved mainboard... I had a lot of contemplating to do regarding this, but after FINALLY checking out the stepping of the XP1600+ that pelly sold me (AROIA Y, YEAAAAHH!!!), I decided to follow his lead and unlock the monster brewing under it's unassuming core...


What good would it do on a Gigabyte mainboard lacking a multiplier switch??

Not much. I could never push fsb past 142, and that never helped much... Stability wasn't satisfactory, and my benchmark score/heat increase ratio just wasn't cool.


Being a mod-minded person, I double checked all the connections on my board to make sure it was the same as the VTXH+...


Hmmmmm.... what if I...

12-27-02, 07:09 AM
With a mind for functionality over aesthetics, I had obtained a 6 position dip switch, as I couldn't find any 5's... no big deal. I disabled the #6 on it... (a later iteration of this will feature the correct switch)...

Experience in thru-hole soldering and reworking comes in handy right about here, as I had to desolder the existing holes VERY CLEANLY without lifting any pads... This was done succesfully, and the switch was placed in it's new home...

12-27-02, 07:15 AM
Using SN37/PB63 solder and no-clean flux, I installed the switch after desoldering... It went in nice and clean.

12-27-02, 07:21 AM
After cleaning the connections with alcohol and trimming the leads down, I'm now ready to put this mobo and ABSOLUTE GEM (*thanks pelly, miss you over here*) of a cpu to the test...

More on this VERY SOON, when I recieve in my new 60GB HD and piect the system back together...

Wish me luck!:)http://www.nvnews.net/vbulletin/attachment.php?s=&attachmentid=699

01-14-03, 12:18 PM
What the crap, man! Finish the story! :D

01-15-03, 01:40 AM
Originally posted by marqmajere
What the crap, man! Finish the story! :D

LOL, no kidding!

I wanna see how it turns out!!

01-15-03, 03:00 PM
awesome work ragejg, can't wait to see the results :clap:

01-16-03, 03:50 PM
I think he gave the results in this thread (http://www.nvnews.net/vbulletin/showthread.php?s=&threadid=6059)

Nice job, stick at it, I hope your figure it out :thumbsup:

01-16-03, 03:59 PM
Geez guys:D:D:D

Well. "that thread" speaks of difficulties in my first unlocking, and my possible beleif in a different capacitor layout(?) between the VTXE+ and VTXH+... I was not sure of the quality of my unlocking... so I dunno... I'm not giving up, and I really believe this may work, but until I score a cpu that has a guaranteed good unlocking (I have unsteady hands especially under a mantis magnifier...), I'm not gonna have any results yet... My PC2700's not even here yet, and I'm just now shopping for an unlocked cpu... I'm gonna offer someone a trade on a locked XP1800+ for an unlocked 1600...

...or something...

Kinda at a standstill... I really haven't seen that many postings anywhere about ppl getting great oc's out of their kt266a, let alone my gigabyte... now I know of a Tom's article re: the VTXH+ but that was with a 1.2mp, and if I remember correctly, not many results were posted...

Don't worry guys/gals, more on this soon...

:afro: :afro:

02-27-03, 03:36 PM
.. and now they shall recieve... an addition to this chapter... here's a pic of the fsb options I supposedly have... :)http://www.nvnews.net/vbulletin/attachment.php?s=&postid=80057

02-28-03, 07:16 AM
the chart continues to the right, with:

150: 75 37.5
170: 68 34
180: 72 36
190: 76 38
200: 66.6 33.3
210: 70 35
220: 73.3 36.6
233.3 66.6 33.3


Waterblock on NorthBridge?
Hacked BIOS?

... but the chart applies to a switch that's not there anymore, replaced by a 1 position switch to set cpu fsb @ 100 or 133... maybe if I restored that switch??

233.3?? CRAZY!!! I'd officially poop my pants if this board could do anything NEAR that... but I'll tone it down a bit and just jump for joy if I ever lock on to 166...

btw there's more discussion on wishing for 166fsb here:

02-28-03, 03:35 PM
T-Bred B 1700 on the way... Are they pre-unlocked?

03-03-03, 04:18 PM
got the cpu... now just gotta wait for friends to give PC2700 back...




yes, I know... teeny chip on core... What can I say, got it for less, and worked (and OC'ed) fine!

07-19-03, 10:31 AM
I am also looking for the 166MHz FSB on my MSI KT2 Combo with the Cypress W312-02H as clk-gen, KT266A and VT8235.

It supports also the manual selction of the main FSB_Mem_PCI clk settings up to 200_200_33, but this can be overwritten via the ICē-link, e.g. via CPU-cool.

Maybe thats the problem on yours as well.

If you are still on this what CLK-Gen chip does your board use?