1333 FSB Mod, Confirmed To Be Working By Me.

[fgw]

Kunaak,

well i can see one reason in doing this mod: if my motherboard/bios dos not allow me to change fsb clock at all, this mod will switch from 266 to 333 fsb - a 50% oc in one step.

can't see any benefit of doing this mod on my aw9d-max? i can easily change the fsb from within bios! why should i want to do this mod then?

did i miss something?

[over@locker886]

shame,i was getting all exited . have you tried benching? to compare and see if theres any loss or gain ?

nice work kunaak .

Same performance..

[over@locker886]

I tried e6400 with p5b dlx, it says bios 1004 supports it, but no post.

No bios problem..I have same mobo/bios and works well..

Mod is good work?

[GrimReaper]

Kunaak,

well i can see one reason in doing this mod: if my motherboard/bios dos not allow me to change fsb clock at all, this mod will switch from 266 to 333 fsb - a 50% oc in one step.

can't see any benefit of doing this mod on my aw9d-max? i can easily change the fsb from within bios! why should i want to do this mod then?

did i miss something?

well not really, motherboards that dont allow you to change clock most likly dont support 333/1333..

[Tony]

All you need do is look at Xeon whitepapers and clockgen whitepapers and you get all the answers

[fgw]

well not really, motherboards that dont allow you to change clock most likly dont support 333/1333..

thats hypothetical to me anyway. will i bring any benefit to a board that supports changing fsb clock from within bios?
ok, the cpu bootstraps from 333 fsb, when i let everything at default in bios!
fine! but whats the difference when i change fsb to 380 within bios anyway?
is there any difference?

[lionel57000]

i try with my e6700 , fsb 1333 , it runs at Vstock !

but very hot in air cooling, with occt it goes up to 74°C

[fhpchris]

Ohh, 400 ^_^

[bing]

All you need do is look at Xeon whitepapers and clockgen whitepapers and you get all the answers

Tony, better use the word "datasheet" rather than "whitepapers", that might help ppl when searching for their own clockgen capabilities.

Well, adding to Tony comment, quoted from the Asus P5B-Dlx Wifi clockgen Cypress CY28551 datasheet on it's freq capabilities , hint..hint.. look at CPU 0 & 1 column !



That is why not every mobo can support that if it is equipped with cheap/outdated clockgen. So just forget the idea of waiting for bios revision if your clockgen doesn't support that speed, it won't help.

[STEvil]

Same performance..

Do not assume. There is a lot of info out there saying otherwise when moving from the 1067 strap to 1333 strap.

[ziddey]

Kunaak,

well i can see one reason in doing this mod: if my motherboard/bios dos not allow me to change fsb clock at all, this mod will switch from 266 to 333 fsb - a 50% oc in one step.

can't see any benefit of doing this mod on my aw9d-max? i can easily change the fsb from within bios! why should i want to do this mod then?

did i miss something?

lol 25%

I tried e6400 with p5b dlx, it says bios 1004 supports it, but no post.

Hmm, maybe it says only for new revision of the boards or something? Or maybe mod wasn't done completely right? With the mod on my ds3, and new bios, it'd post but at 266. With older bios, it won't post at all.

[over@locker886]

Do not assume. There is a lot of info out there saying otherwise when moving from the 1067 strap to 1333 strap.

I did mod, but my mobo same use 1067 strap. P5B-D change strap, when fsb start 401fsb and higher from bios..

[zaarath]

so, its not possible an E4XXX (200MHz) become a 333MHz, because 200MHz are L-H-L and 333MHz are H-L-L

we have to mod more pins (BSEL1 and 2) on E4XXX in order to work, like:


make a jumper between G30 <-> J30 and isolate H30
or simply isolate H30 to have 266MHz, an E6600 with half cache.





/// EDIT
reading Intel's Xeon 5100 Series Datasheet I've found that on page 19:


So, the reserved is for 333.33MHz, and it is H-L-L . The pins are the same, G30.

dont think you can get L-L-L by isolating H30, my guess is that you need to ground H30 for 'L'.

edit: Just found the E4300 266FSB below, that guy essentially grounded H30.

[Millyons]

Tony, better use the word "datasheet" rather than "whitepapers", that might help ppl when searching for their own clockgen capabilities.

Well, adding to Tony comment, quoted from the Asus P5B-Dlx Wifi clockgen Cypress CY28551 datasheet on it's freq capabilities , hint..hint.. look at CPU 0 & 1 column !



That is why not every mobo can support that if it is equipped with cheap/outdated clockgen. So just forget the idea of waiting for bios revision if your clockgen doesn't support that speed, it won't help.

Really wondering if any of this can be used to Stop P5B Dlx from switching to 1333 at 401 and going up at 1066.....that would be

[Kunaak]

All you need do is look at Xeon whitepapers and clockgen whitepapers and you get all the answers

what I am curious to try now, is the 400 mark.
someone figure that out, and I'll see what happens...

[Kunaak]

If Anyones Curious.

1333 Mod works just fine in the RD600 too.
tested it just now, boots just like it should.

E6300 Modded, 7 x 333.

[M3kk]

If Anyones Curious.

1333 Mod works just fine in the RD600 too.
tested it just now, boots just like it should.

E6300 Modded, 7 x 333.

Confirmed

E6600 Moded, 9 x 333 on DFI`s RD600 ...

[MarlboroMan]

dont think you can get L-L-L by isolating H30, my guess is that you need to ground H30 for 'L'.

edit: Just found the E4300 266FSB below, that guy essentially grounded H30.

i know, it was my mistake, as i said b4. Its really difficult to make a mod on E4XXX to reach 333MHz.



Can you guys write the following information:
-processor
-mobo+bios
-mod worked?

it will help people that are having problems

[kiwi]

You not only need proper bios but also cpu that boots at 400fsb stock volts Unless vcore has been modded

[Kunaak]

You not only need proper bios but also cpu that boots at 400fsb stock volts Unless vcore has been modded

my 6300 will do 400+ just fine at stock volts.

plus, like I said in my first post...
how can I know it won't work, if I dont try it?

(said that about Quad Core 1333 modding)

and any mod I try, can easily be undone.
so if you know the pins for 400... show me.
I'll try it.

[MarlboroMan]

my 6300 will do 400+ just fine at stock volts.

plus, like I said in my first post...
how can I know it won't work, if I dont try it?

(said that about Quad Core 1333 modding)

and any mod I try, can easily be undone.
so if you know the pins for 400... show me.
I'll try it.

according to this:


Its BSEL1 to High (pin H30), BSEL2 to High (pin G30)
All you have to do if you already have a modded cpu is mod pin H30 to high. I don't know if will work, because your mobo or any other supports 400MHz native.

[supa-fly]

Someone here mentioned that this doen does not work on some 975X
boards. Well on my Intel D975XBX (Bad Axe I) this is not neccesarry to
do at all. I say this because you can set the FSB to 1333 in the bios.
I persnally have a E6600 on a Bad Axe 1 running at 1333 FSB + 20%
host burn = 3.6Ghz. I have got it to do 3.75Ghz (Unstable) at 1333
FSB. When I first set the bios to 1333, I could do 3Ghz and 3.3Ghz at
default Vcore. I think I couldnt get past 3.75Ghz cause Im only running
DDR 667 Ram.
But this is really cool none the less, just not needed on Bad Axe 1.

[Tony]

Someone here mentioned that this doen does not work on some 975X
boards. Well on my Intel D975XBX (Bad Axe I) this is not neccesarry to
do at all. I say this because you can set the FSB to 1333 in the bios.
I persnally have a E6600 on a Bad Axe 1 running at 1333 FSB + 20%
host burn = 3.6Ghz. I have got it to do 3.75Ghz (Unstable) at 1333
FSB. When I first set the bios to 1333, I could do 3Ghz and 3.3Ghz at
default Vcore. I think I couldnt get past 3.75Ghz cause Im only running
DDR 667 Ram.
But this is really cool none the less, just not needed on Bad Axe 1.

It only works if the bios has had a recent 1333 support update, no code no worky...simple as that

[Tony]

BSEL2+BSEL1 to VCC , so just link BSEL2 and 1 together with the mod you did for 1333 and it may boot at 1600

[fhpchris]

BSEL2+BSEL1 to VCC , so just link BSEL2 and 1 together with the mod you did for 1333 and it may boot at 1600

Try it