Note for those running heavy oc'ed Quadfire 4890

[LardArse]

Whem making the Classified I did take precaution to increase trace thickness for the 4 PCIE slots for the 3 groups of power. As before when overclocking quad fire 3870 I found they eat a lot through pcie slots.

This way the trace does not burn up, or restrain cards oc in quad fire.
However as there are only 2 +12v yellow wires, the connectors thus get hot at the 24pin ATX.

I myself have melted the 24 pin ATX connector when running 4 x 4890 oc. I dunno why these cards draw so much from slots, the nvidia cards dont seem to

Anyways if you are one of those quad fire guys this may help you.






This should fix you up.

[Kabauterman]

Was that the reason why Kevins Board burned?

[LardArse]

Yes, the 2 yellow wires of the 24pin only power the slots and just one or tow low current linear power regs

[dinos22]

nice one
kev could have used that advice heh
his 24pin burnt just as you describe

[K404]

Thanks for the idea Peter

I knew that with PCI-E2.0 power distriution and Q-SLI/ CF-X, that kind of current draw would distress boards eventually.

[dpa]

blah, I really dont want to solder on my board....

working as a charm at 1000Mhz * 4 and 1.45 * 4..

[[XC] gomeler]

Thanks for the heads up Shamino, would hate to burn out my $400 beauty

[Patch]

Pardon my inexperience, but I'm gonna give this a go and have 2 questions:

1) That is a regular molex connection you're soldering on there, correct?

2) Do you need to remove the 2 yellow 12V wires from your PSU 24 pin ATX connector when doing this? Or plug it in as is and have both the 24 pin and your mod supplying power to the trace?

[LardArse]

no just solder , yes molex connectors, dont do nothing to the origianl Power supply, but other than 24pin plug in the molex of your psu too.

[Patch]

Thank you.

[carpo93]

this mod can work on other mobos?

[LardArse]

this mod can work on other mobos?

yes though i dont know how thick the trace for +12v to pcies on other boards are so its best to solder behind the slots themselves.

[carpo93]

tried on m4a79-t deluxe, but the mobo seem died

i think there is a sort of protection

[Vivi]

the dangers of modding :?

[hipro5]

tried on m4a79-t deluxe, but the mobo seem died

i think there is a sort of protection

You must have done something wrong then...
The 24 pin connector is UNIVERSAL for ALL platforms and it uses the EXACT SAME PINOUTS....

[carpo93]

You must have done something wrong then...
The 24 pin connector is UNIVERSAL for ALL platforms and it uses the EXACT SAME PINOUTS....

you can be right

but i think the mobo has an overload protection, so istantly swich off

[LardArse]

you can be right

but i think the mobo has an overload protection, so istantly swich off

its your psu, some psu diffrent +12v rails connect together it protects, find the same +12v rail as the atx (by using continuity check on the yellow pin and of the atx) or a different psu

[carpo93]

ok but the mobo now is death

i tried with other psu, but it gave me a black screen and all the fan on

[LardArse]

uhmm, did your ATX connector on your MB happen to face the other direction for the locking clip?

[carpo93]

yes, but i do the rigth mod for my direction

[G H Z]

I myself have melted the 24 pin ATX connector when running 4 x 4890 oc.

Were the cards on air?

[carpo93]

someone has the pci-e electric scheme?

[LardArse]

only air man

[runmc]

Lardy -

Would this mod be of any benefit if you were only using 2-3 4890?

[carpo93]

only air man

thx

i'll do my own mod