xp1700.. unlocked?

[phill21]

hi
im having some problems trying to get the cpu to go above the multiplier of 12.5..
i have bad memory at the moment, only pc2100 crucial stuff, and its not going above 148fsb.. which i can understand.
but when i just try and overclock the cpu anymore it just goes back to 1100mhz and i have to go in the bios and 'reset' it..
can anyone help me out here? i have just downloaded the latest bios patch for the board (i have a epox 8RDA+ nforce 2, with one of the 'special' xp1700s that are floating about).. if you need anymore info, please just shout!
thanks for the help!

If it blows up? Opps.... I must have been doing something wrong

 

[lhgpoobaa]

The multipliers are only unlocked up to 12.5
To get above u have to do a chip mod... cut some bridge i believe.

<b>Now can someone explain how we ever got the idea that baby bunnies lay multicolored eggs made of chocolate in our living rooms?" :lol: </b>
<A HREF="http://members.iinet.net.au/~lhgpoobaa/images" target="_new">http://members.iinet.net.au/~lhgpoobaa/images</A>

 

[phill21]

where would i find out how to do it and what would i need to do it as well?
thanks for the help!

If it blows up? Opps.... I must have been doing something wrong

 

[khha4113]

<b><A HREF="http://www.ocinside.de/html/workshop/socketa/xp_painting.html" target="_new"><font color=red>Interactive AMD T-Bred painting guide</A></b></font color=red>
Pay attention on L10 (not L3, sorry) bridges when you change its multiplier over 12.5.

Good or Bad have no meaning at all, depends on what your point of view is.<P ID="edit"><FONT SIZE=-1><EM>Edited by khha4113 on 04/27/03 01:03 PM.</EM></FONT></P>

 

[phill21]

thank you for the info.. i will see what happens when i get this new memory, hopefully a 200 fsb should be ok to do and i can just go as far up as i can with that.. depending on multiplier i will end up using.. hopefully nothing past 12.5!! i wouldnt feel very comfortable doing that.. i have a big lack of confidence.. [sad]

If it blows up? Opps.... I must have been doing something wrong

 

[phsstpok]

I assume you have a Tbred B becuase you said your multipliers are unlocked up to 12.5x. Is this right?

The only nForce2 board (that I am aware of so far) that can unlock all the multipliers (high and low) for your XP1700+ is the Abit NF7-S.

I think some KT400 mobos have all the multipliers available also.

Most overclockers prefer to get faster memory and boost the FSB speed. A Tbred B XP1700+/XP1800+ is perfect for this. However, if you insist on getting higher multipliers you need to do a mod.

You have many choices. You can mod the L3 bridges. With an Tbred B XP1700+ you can cut the 3rd and 5th L3 bridges. This effectively changes your default multiplier from 11x to 13x. Your 8RDA+ will think it has an XP2100+ and allow you to use the higher multipliers.

You can also mod the back of the CPU, the CPU socket, or the back of the motherboard. By connecting the pin corresponding to the desired L3 bridge to a Vcc pin (Vcore) this is similar to cutting the L3 bridge. By connecting it to Vss (Ground) it's like painting the L3 bridge.

There is a difference these mods override the CPU default and BIOS settings. For example, you could hardwire all 5 multiplier bits to say 15x (usefull for a legacy motherboard) but if you did you this then 15x is the only multiplier choice that you can make. If you hardwire just the 8x bit to HI then that bit becomes fixed HI but you can change all the other multiplier bits, i.e. you can only access 13x and higher and no longer access 5x-12.5x.

This link explains the multiplier circuits.

<A HREF="http://www.beachlink.com/candjac/TbredDecode0.htm" target="_new">http://www.beachlink.com/candjac/TbredDecode0.htm</A>

And this link talks about some of the mods + issues.

<A HREF="http://www.beachlink.com/candjac/Workarounds.htm" target="_new">http://www.beachlink.com/candjac/Workarounds.htm</A>

You can also find lots of help from the AMD overclocking newsgroup, alt.comp.hardware.overclocking.amd (to access via Google Groups click <A HREF="http://groups.google.com/groups?hl=en&lr=&ie=ISO-8859-1&safe=off&q=alt.comp.hardware.overclocking.amd" target="_new">here</A>).





<b>99% is great, unless you are talking about system stability</b>

 

[phill21]

its probably worth me getting the abit board!! im not very keen on playing about with the cpu.. im never sure what im doing, but i do have a mate in a local computer shop that might be able to do it for me..
its probably easier to stick with a fsb of say 180 to 210 or something, and just see how far up the ladder it will go...
if i need a higher multiplier after that, then i might have to consider something, but either way, i will wait, read up on it and see how far it overclocks when i get the better memory..
thank you so much for all the help..
its great!

If it blows up? Opps.... I must have been doing something wrong

 

[phsstpok]

Sounds like a plan. Keep an eye out for updated 8RDA+ BIOSes that fix the nForce2 BIOS corruption issue. (Might already be available).

Tbred B XP1700+ is a great bargain overclocking chip. With nForce2 the not having the higher multipliers is not a huge issue. Some have reached 230+ mhz FSB. Not saying you can do this but this gives you the potential of 12.5 x 230 = 2875 Mhz. Plenty of headroom for any Tbred B.

Those of us with legacy boards (pre KT400) usually find the XP2100+ easier to work with because the higher multipliers, the higher default voltage, and the mods can be avoided. Plus if one wants to upgrade the mobo later and the lower multipliers are needed the very easy "U" trick on the 5th L3 bridge is available.

<b>99% is great, unless you are talking about system stability</b>

 

[phill21]

well im hoping that it will work, i mean if i hit 12.5 x 200fsb, im not going to be arguing!! but getting anything more would be great.. but im not that worried about it like that..
just hitting my wanted 2ghz will be more than enough.. im running 21.5 x 148fsb, which is 1850, which is xp2200 speeds anyway.. its not like its slow or anything!
well, i know some of the people that do great things with these chips have been getting 3ghz +!! i think i heard that someone had 4ghz... but im not sure on that one..
thanks for the help!!

If it blows up? Opps.... I must have been doing something wrong

 

[TheMASK]

im running 21.5 x 148fsb

wow, thats an amazing 3182MHz, equivalent to a 4200+. now hitting such a speed wud be amazing

somebody stop me!!

 

[phill21]

i think maybe it could have been.. no wait hang on, it was 12.5 x 148..
stupid memory is holding me back!!!
still i know of a few people that have doubled the clock speed of their xp1700s and are getting nearly 3ghz.. one guy was doing it on -7c water.. was very impressive..
i think i had gave a link some where else in this forum.. i was shocked at the speed of it.. shame it only had a g4 ti 4200 on it, but then that was scoring over 15000 points in 3dmark 2001se.. so it couldnt have been to bad!!
im aiming to hit 2ghz using a 200fsb, if i get more i wont argue and wont complain..

If it blows up? Opps.... I must have been doing something wrong

 

[lhgpoobaa]

Dunno LOL
try a google search.

<b>Now can someone explain how we ever got the idea that baby bunnies lay multicolored eggs made of chocolate in our living rooms?" :lol: </b>
<A HREF="http://members.iinet.net.au/~lhgpoobaa/images" target="_new">http://members.iinet.net.au/~lhgpoobaa/images</A>

 

[phill21]

why would i need to use google search?

If it blows up? Opps.... I must have been doing something wrong