All multis above 12.5 reset CPU to 1100 MHz (nForce2 + T-Bred B)

c627627 · Sep 16, 2003

All Thoroughbreds and Bartons come factory unlocked, right?
Certain older mobos only see half of the multipliers so you can only select below 12.5 multis or above 12.5 multis, right?

But why does a 1700+ T-Bred B reset to 1100 MHz every time any multiplier above 12.5 is actually selected regardless of what FSB it's set to.

1700+ Thoroughbred B
Epox 8RDA+ nForce 2

Thermalright SK6+ with Antec fan
Kingston PC2100 (133 FSB to 150 FSB)
Fortron 350 W

(I'm guessing it's an isolated problem that is not found on other 8RDA+s or other nForce2s.)

EDIT: No, since I have 8RDA+ & 2100+ B without this problem, it occured to me that
1700+ is 11 x 133 but
2100+ is 13 x 133 default chip

13 is above 12.5 at default so all multis are available for 2100+, it's the below 2100+ chips that will have this problem only.

OC Detective · Sep 16, 2003

Its booting in safe mode at 11 x 100 - thats all.

FizzledFiend · Sep 16, 2003

why htough...same problem can't get past 12.5 pushing my barton 2500+ 1.8 to 2.5 no sweat temps are awesome with liquid cooling I should be able to go 200fsbX13 without a sweat should boot atleast...it just defaults?
maybe I need to fiddle with unlocking those L3 bridges like in this site http://www.ocinside.de/go_e.html?/html/workshop/socketa/tbred_painting.html ?

OC Detective · Sep 16, 2003

Your mobo doesnt recognise the 8x bit so you cant automatically set it to high (required for multis 13 and up) so yes you have to adjust the L3 bridges by blowing the 3rd and 5th ones. One thing though 200 x 13 = 2.6ghz which I would say is not so easily achievable.

c627627 · Sep 17, 2003

Well FizzledFiend did not say what his mobo was.

I did. nForce2. They read all multis. It still boots in safe mode regardless of FSB selected, as long as multi is above 12.5. Why?

P.S. People with mobos that don't recognise the 8x bit, they can select above 12.5 but it ends up not being 12.5 or is it that they can't even select above 12.5?

OC Detective · Sep 17, 2003

Its just how your mobo handles the inability to manipulate the higher multis - and as you know just because it is an NF2 doesnt mean it can handle all the multis automatically - very few do. Most mobos will "show" multis beyond 12.5 because they are equipped to run cpus such as XP2700 etc (8x bit set to high)however that does not mean that when the 8x bit is set to low on a cpu(XP1700 or XP2500 Barton etc) it can use them.

c627627 · Sep 17, 2003

Hm.. my very own 8RDA+ does fine with a multiplier of 15.
I think it's a prob isolated to that other specific 8RDA+, but what kind of a problem would it be if it's not chipset wide or model wide.

____________________
2100+ AIUHB 0248 MPMW
256MB Crucial PC2100 + 2x 256MB Kingston (Hynix chip) PC2100 @ 6 3 3 2
[152] FSB x 15 = 2280 MHz @ 1.8 Vcore with memory frequency at 100% [152] @ 2.77 Vdimm
37(min) C to 46(max) C Winter ; 42(min) C to 50(max) C Summer
Epox 8RDA+
Thermalright SK-7 with variable speed 80x25mm YS-Tech FD1281259B-2F
BFG GeForce4 Ti4200 8X 128MB; Antec SX-835II case ; 350W Antec SmartPower SL350

c627627 · Sep 17, 2003

OOh I may know why, check this out.

1700+ is 11 x 133 but
2100+ is 13 x 133 default chip

so 13 is above 12.5, meaning 2100+ can be set to whatever multi you like.

1700+ on the other hand can handle only multis 12.5 and lower.

How come we haven't talked about this before?

Is it because most people don't do high multis because they have better RAM?

By the way default multi's are:
1500+ 10 x
1600+ 10.5 x
1700+ 11 x
1800+ 11.5 x
1900+ 12 x
2000+ 12.5 x
2100+ 13 x
2200+ 13.5 x
2400+ 15 x

That's why 2100+ is the one to get if you have 133 FSB PC2100 RAM and thus plan on using high multis.

1700+ is good with better RAM and lower multis.

The Coolest · Sep 17, 2003

I think the 1700+ is not only good for good RAM, a simple wire trick/bridge cut/blow will do the trick and give you higher multipliers so its not too hard to get to the high range, even w/ a 1700+ and use high multipliers.
Right now my chip is set to x13 multi as its default but my mobo can overwrite that using dipswitch settings, but in any case if I had now go 100% jumperless I'd get x5 as my default multi, coz I did a wire trick to go back to the lower multi range.

c627627 · Sep 17, 2003

Let me get this straight.
No 1700+ can do above 12.5 multi on any board without a wire trick?

OC Detective · Sep 17, 2003

c627627 said:
OOh I may know why, check this out.

1700+ is 11 x 133 but
2100+ is 13 x 133 default chip

so 13 is above 12.5, meaning 2100+ can be set to whatever multi you like.

1700+ on the other hand can handle only multis 12.5 and lower.

How come we haven't talked about this before?

Is it because most people don't do high multis because they have better RAM?

By the way default multi's are:
1500+ 10 x
1600+ 10.5 x
1700+ 11 x
1800+ 11.5 x
1900+ 12 x
2000+ 12.5 x
2100+ 13 x
2200+ 13.5 x
2400+ 15 x

That's why 2100+ is the one to get if you have 133 FSB PC2100 RAM and thus plan on using high multis.

1700+ is good with better RAM and lower multis.

Er this is exactly what I was saying in my earlier post (12.5 and below 8x bit set to low and 13 and up 8x bit set to high - I even gave you examples - XP1700 and XP2700!!)
One other thing you may find on some boards you cannot access the lower multis with cpus such as XP2100 (where the 8x bit is set to high) indeed with some older boards you may not even be able to choose anything other than the default multi - unless you deliberately select a multi that is 8 less than what you are aiming for and even then that may not work.

OC Detective · Sep 17, 2003

c627627 said:
Let me get this straight.
No 1700+ can do above 12.5 multi on any board without a wire trick?

Incorrect - if the board can recognise all 5 Fids then you dont need to mod - Abit for example is one such board.

c627627 · Sep 17, 2003

So it's not a chipset, it's the board. Isn't it strange that there isn't some sort of a list which boards see all multis.

1. Is this the site for wire the trick:
http://www.ocinside.de/go_e.html?/html/workshop/pinmod/amd_pinmod.html

2. What? Palomino too, are you sure about that?

The Coolest said:
You have to connect two pins on the CPU, just FYI, it only unlocks the lower end multiplier for XP2100+ and higher (both Tbred and palomino), the L3 bridge trick will only work on a Tbred. If you have XP 2100+ and you know your RAM and other components can handle high FSB, then do it.

OC Detective · Sep 17, 2003

You would need to close all the L1's first on the pally. Yes that is the site for the pin mod but also you should use this site as well.
http://www.beachlink.com/candjac/index.htm

c627627 · Sep 17, 2003

Thanks.

So can you name more mobos that see all multis?

OC Detective · Sep 17, 2003

I will leave that to people that have them as the Abit is the only one I know of - I know you have asked this before and didnt get a definitive answer so hopefully you might get more luck this time! If not the only conclusion you can draw is that if you want to have access to ALL multis without modding then you need to buy an Abit NF2 or Abit K400 - perhaps the K600's have access to all but again we need feedback from users.

Mustanley · Sep 17, 2003

FYI, the Asus A7N8X series boards do not support the full range of multipliers.

SlipperyToy · Sep 17, 2003

Mine does....Only after I installed a speed strip.....Found here!

All multis above 12.5 reset CPU to 1100 MHz (nForce2 + T-Bred B)

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