OC 2500+ questions

OCuser · Mar 21, 2003

important specs:
Athlon 2500+ (multiplier set to 12.5 = 2.083 MHz or 2800+ at post)
A7NX8 Deluxe
Global WIN copper heatsink (Artic Silver 3)
Corsair 1024MB (2x512MB) PC2700 XMS Dual Channel
Enlight Dual Fan 420w
4 case fans

I just put this system together, and did the copper wire trick to unlock the multipiers. But the muiltipiers will only go up to 12.5. If I try 13 the cpu runs at about 833MHz. Is 12.5 the highest it can go? Plus there doesn't seem to be an option in the BIOS to change the FSB incremently. The only options I have is 100/133/166. Also the CPU temp in the BIOS says 52*C, but on ASUS PC Probe states 42*C...?

Thanks in advance

Edited by OCuser on 03/21/03 04:32 PM.

svol · Mar 21, 2003

Hmmm... looks like you got only access to the lower multiplier range (12.5x and below). I think you need to cut the last L3 bridge for higher multipliers... but first try if updating your BIOS helps.

Oh and I would rather trust the BIOS then ASUS Anal-Probe.

My dual-PSU PC is so powerfull that the neighbourhood dims when I turn it on

OCuser · Mar 21, 2003

Is there a web page that would show the exact two pins to link together?

pIII_Man · Mar 21, 2003

go to
http://www4.tomshardware.com/cpu/20030210/barton-05.html

OCuser · Mar 21, 2003

Thats how I learned to unlock .5 - 12.5. Is there a web page to any site showing how to unlock the 13 - 22.5 multipliers? So far all pages I've look at only show the lower multipliers.

Thanks for trying to help me though.

pIII_Man · Mar 22, 2003

sorry my mistake. I don't know what method they used to get the extra multipliers. Why don't you try to go to
http://www4.tomshardware.com/column/20011124/index.html
and download the movie that shows the other method (with the l3 bridges). Good luck please post how well the 2500 overclocks when you get things smoothed out (i'm looking to get one). Have fun!

pIII_Man · Mar 22, 2003

BTW svol it is my understanding that the l3 bridge must be connected at the first pin from the right and that from amd it comes cut, although i don't own a bartron so i don't know for sure.

phsstpok · Mar 22, 2003

The wire trick, "U" trick, CPU backside painting trick, and motherboard backside painting trick all do the same thing. They take a Tbred or a Barton with a high multiplier (13x or higher) and allow them access to the lower multipliers (5x-12.5x).

A Barton 2500+ already has a lower multiplier, 11x IIRC. You want to go the other way. However you can't cut a connection with the wire trick or either of the painting tricks.

The only way to access the higher multipliers (that I know of) is cutting the 5th L3 bridge. Works on Tbreds. Still waiting to hear about Barton owners.

Try a BIOS update (as already suggested). Another nForce2 board, Abit NF7-S, can access all the multipliers. Maybe an update will do the same for you.

99% is great, unless you are talking about system stabilityEdited by phsstpok on 03/21/03 08:09 PM.

OCuser · Mar 22, 2003

Well I did update the BIOS to 1002.a, but that didn't do the trick with being able to set the FSB incremently. In the Barton article from feb. 10th they were able to raise the FSB with the 3000+ and the same board, but how? is there a good OC program that can achive this?

As far as cutting the 5th L3 bridge, it sounds like a good idea, but has someone done this on the baton core and it works? I dont want to have a $190 mistake on my hands.

But so far having it OC to 2083 is working great. I would run some benchmarks but I'm stuck with a Radeon 7000 64MB DDR VC while my Gigabyte 9700 Pro is in RMA status because the fan stopped working and G.B.T. inc. says it could take up to four weeks to get it back. :-(

But if anyone has played around with the 2500+ and A7NX8 deluxe mobo, please let me know what you've done.

Thanks

svol · Mar 22, 2003

No this is only for the higher multiplier T-breds (and probably Bartons too).
You can find the evidence <A HREF="http://www.ocinside.de/go_e.html?/html/workshop/socketa/tbred_painting.html" target="_new">here</A>. Just compare the lower and higher end multipliers and you will see that the last one is cut for the high end T-breds.

My dual-PSU PC is so powerfull that the neighbourhood dims when I turn it on

phsstpok · Mar 22, 2003

I'd wait until you hear other reports before mod'ing a $180+ processor but you shouldn't even have to do this. Most people want lower multipliers so they can use higher bus speeds. Don't know why you can't go higher. What memory (brand/speed) are you using? You need at least PC2700 to go to 166 Mhz FSB and PC3200 to attempt 200 Mhz.

Depending on the memory, you might want even higher rated DIMMs if you want to use aggressive timings plus high clock speeds.

99% is great, unless you are talking about system stability

OCuser · Mar 26, 2003

Yes I finnally did. The problem with trying to set the FSB incremently was that I had the system setting on aggressive instead of user define. Now my specs are:
Multiplier 12.5 x 182 = 2275
CPU voltage = 1.775
RAM voltage = 1.67 (still at 2-2-2-5)
Temp = 57*C :-( (I might try lapping to bring it down a little)
But it's running great.

A 3000+ runs at 2.16 and I'm at 2.275. I just saved myself $400!!!

At 183 I would get a crash every great so often. But so far now at 182 there have been no crashes at all.

Now once I get my 9700 Pro back I'll post some benchmarks.

I would still like to know if there is anyone who knows for sure how to get the high multipliers.

pIII_Man · Mar 29, 2003

that cpu's running a bit hot, maybe you should upgrade your fan/heasink and push that baby a little higher.

umheint0 · Mar 31, 2003

Try running Prime95 and see if you really are stable. I doubt you are, especially at that temp.

I had to drop down to 189x11 from 12.5 because I wasn't Prime95 stable (you'll get an error if you aren't stable). And it's not like I'm running crappy hardware either (with what's listed below, I also have a Volcano 9+ running at full force and 5 case fans blowing right over the thing, and that wasn't enough). I'm upgrading to an SLK-800 with the Smart Fan II from my volcano 9+ and then we'll see where I can get with that (hoping for 195x12 at least). Who knows...

Trust me, it'll make your life just a wee bit easier if your computer doesn't crash every time you try to play a game.

XP 2500+ Barton @ 2241Mhz
A7N8X Dlx
2x512MB Corsair PC3200
MSI GF3Ti 500
16x DVD-ROM
2x80GB 7200RPM Maxtor
Onboard audio

OCuser · Apr 1, 2003

Well it's been about a week with the same settings and no crashes yet. I've played a lot of games to test it out and still no crashes. I will try Prime95 to make sure, but still after a week of heavy game playing and what not it runs great. I am using a Globalwin CAK-II 16, which is'nt a bad HSF, but I plan on moving up to the SLK-800. Any suggestions on what fan to use for it? I dont want to buy a whole HSF just for the fan itself though.

OCuser · Apr 1, 2003

I just happened to do a little searching on newegg and I think I'm going to go with the VANTEC's Tornado fan, Dimensions 80x80x38 (mm), Fan Speed: 5700 R.P.M., Air Flow: 84.1 CFM. with the SLK-800.

OCuser · Apr 1, 2003

Ok, I just heard what it sounds like to have for a fan that produces 52dba and WOW, I just could not handle that. So I guess I will invest in a water cooling system in the next couple of monthes. I'm pretty happy where things are at for now.

umheint0 · Apr 1, 2003

lol.

XP 2500+ Barton @ 2241Mhz
A7N8X Dlx
2x512MB Corsair PC3200
MSI GF3Ti 500
16x DVD-ROM
2x80GB 7200RPM Maxtor
Onboard audio

OC 2500+ questions

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