Tyan TigerMP with 1800+XP pssible??

I'm sorry if this has been asked. I'm just in a rush so ...
Can i rundual 1800XP on this board provided i modded the L5 brigde???
Any particular info i need to know to get them working perfectly???

Yes this is my first attempt going dual.
(just sold my 2400+ for it) hope i dont regret
MameXP,

Yes it can be done (look in sig) My 1800s were the palamino core and so did not need the l5 mod but if your's is cut just connect it and enjoy the dually goodness

Isn't there an issue with this board melting the ATX power supply plug if too much power is used/needed?

poopygood said:

Isn't there an issue with this board melting the ATX power supply plug if too much power is used/needed?

Click to expand...

Yes, there is an issue with that, with high speed CPU's and running the system 24/7.

I believe the board is certified up to 2000+, but beyond that is the danger zone.

I run modded dual XP1600 Palomino's in a Tiger MP. They were running very hot, since I couldn't adjust the Vcore, so I modded the chips to run at 1.55 Vcore and my temps dropped 15C.

kaltag said:

Yes it can be done (look in sig) My 1800s were the palamino core and so did not need the l5 mod but if your's is cut just connect it and enjoy the dually goodness

Click to expand...

Your chips were probably the pre-SMP disabled Palominos. Not all of them were SMP enabled, just the first couple of batches.

If you buy new chips right now you can pretty much count on having to L5 mod them.

I agree with cmcquistion,
I am running dual 1600+ at
1900+. I have also low-volt modded them.

If you are worried about the power (and can solder)
- just take a 4-pin power connector and use it to double
up the 5-Volt lines (I am purposefully vague).
The initial problem is that each of the 5V lines on
the ATX connector is designed for 6Amp. As standard
the XP1600+ can draw 5.5Amp constantly. Running
so close to max for a long time can cause connector
heat-up and burning.
Adding extra 5Volt wires divides out the current. I added
4 extra wires - each now carrying just over 2.75 Amp -
well within any limits.
Most of todays dual boards have extra 5Volt connectors
as standard or take their power off an extra 12Volt connector.

Oh - long post.

boards

Tyan MP (s2460)

Runs some XPs as MPs with 1.03 bios.

Running 1.03 bios and 1.05 bios (both max support up to 2000+) two with 2100+ MP palominos and one with 2600+ L5 modded Tbred B's. Stability 100% ok. These are Gentoo servers, some rackmount, some in Antec cases. All 3 of them are laoded with 4GB of ECC ram.

Hey Arkaine23,

WOW !

You've got a modded (L5 bridge) pair of XP 2600+ CPUs running
protien folding 24/7 on a Tyan TigerMP s2460 ? Impressive !

I'm running a Tyan s2460 (v1.03) with max recommended CPUs (1900MP),
but I want to upgrade to a pair of modded 2400+ or even 2600+ CPUs.

Do you have any recommendations for preparing my system to
attempt to handle the 2600+ CPUs? Did you have any initial
issues with the set-up of the 2600+ CPUs? Bios tweeks?

What make & model cooling system do you have on your 2600+ s2460?
What make & model is the PSU on this system?
Did you do the s2460 ATX connector mod to prevent ATX melt down?

http://forums.2cpu.com/showthread.php?s=&threadid=28746


I you'd prefer, please e-mail to:

[email protected]

I would advise against running any processor above 1900XP.

The load placed on the atx connector no matter how many 5v supplies you attach to it is extreamly likely to melt.The issue is not the Power Supply and it's ability to sustain the required voltage and amperage.The Issue is the main boards ability to handle that current and it is proven that the ATX connectors MELT.

Perhaps it is better to err on the conservative side when dealing
with an expensive computer, but that philosophy seems odd in a
forum whose subject concerns experimenting with pushing the spec.s
to the maximum of their limits (without doing damage) ;-)

I'll take your advice, but I'd like you to give us a fairly detailed
explanation as to why:

Most of the users who found their ATX connector to be fried were
running 1400+, 1600+, 1800+ processors. These are lower wattage
CPUs than I'm are running currently (1900MP), aren't they?

This poor guy was running an unmodded set-up with 1600+ CPUs:

http://students.washington.edu/vladis/atx_burn/

I have exchanged e-mail with 4 separate users in the 2CPU.com
forums who have been running modded XP 2400+ CPUs on their s2460
for several months (24/7 SETI) without heat or stability issues.
Only one of the 4 has performed Shane's "extra wires" mod to protect
the ATX connector.

Using wattage calculations, the Palomino 1900MP (.18) is rated at 68w
while the Thoroughbred2 XP 2400+ (.13) is rated at 68.3W, not really
a significant difference? See comments in the 2nd post down by
user "Vlads" in the link below:

http://forums.2cpu.com/showthread.php?postid=225029#post225029

Why has the ATX connector NOT burned up in the month that Arkaine23
has been running the pair of modded XP2600+ CPUs on the s2460?

I'm not well informed enough to render my *own* opinion as to
the wisdom of exceeding the 1900MP recommended limit, but I'm
still curious as to *your* well thought out response to the above.

big_cochino said:

I have exchanged e-mail with 4 separate users in the 2CPU.com
forums who have been running modded XP 2400+ CPUs on their s2460
for several months (24/7 SETI) without heat or stability issues.
Only one of the 4 has performed Shane's "extra wires" mod to protect
the ATX connector.

Using wattage calculations, the Palomino 1900MP (.18) is rated at 68w
while the Thoroughbred2 XP 2400+ (.13) is rated at 68.3W, not really
a significant difference? See comments in the 2nd post down by
user "Vlads" in the link below:

http://forums.2cpu.com/showthread.php?postid=225029#post225029

Why has the ATX connector NOT burned up in the month that Arkaine23
has been running the pair of modded XP2600+ CPUs on the s2460?

I'm not well informed enough to render my *own* opinion as to
the wisdom of exceeding the 1900MP recommended limit, but I'm
still curious as to *your* well thought out response to the above.

Click to expand...

Maybe Tyan improved the 2460 with later revisions/batches after all the RMA's and complaints of the problem?

maybe one month of 24/7 use isn't enough to cause a problem?

It seems to me to be good insurance to the the motherboard 5V mod, if you want to run high speed chips. It can't hurt and it may save your board and power supply.

I've done RMA's with Tyan before. Trust me, you don't want to go through, what I went through. If it were me, and I wanted to run high speed CPU's in the board, I'd mod it, and save myself from a lot of heartache, later. (my Tiger MP is only running 1400 MHz @ 1.5 Vcore, so I'm not worrying about it, right now.)