Mods to OCZ600ADJ-SLI

[proth]

Yes I have it and it's a POS...and willing to hack it up at this point.

There are 38total amps available on the +12v rail and want to understand how the rails are distributed before I tie them together. What rails go where?. Anyone knows if it goes like this?:


Rail 1 12v V1(20A):
(2) 4pin CPU connectors
(1) 4pin next to 20 pin main mobo connector

Rail 2 12v V2(18A):
(2) PCI-e 4pin connectors
(1) SATA connectors
(2) VGA/HDD 4pin traditional connectors
(2) Genereal purpose 4pin traditional connectors

[Oklahoma Wolf]

12v2 should only go to the 4+4 modular connector for the CPU, 12v1 should go to everything else. These should be differentiated in the wiring too - most PSU's have yellow wires with a black (or other color) stripe to show they're connected to a different source from the plain yellow wires.

[proth]

12v2 should only go to the 4+4 modular connector for the CPU, 12v1 should go to everything else. These should be differentiated in the wiring too - most PSU's have yellow wires with a black (or other color) stripe to show they're connected to a different source from the plain yellow wires.

Thanks. The next question I need to get answered is that my mobo has both a power connection using the traditional 4 pin conn (called EzPlug) AND the 4+4 pin CPU connectors. I see no difference in available current when the EZplug is used and assume these 12v are isolated. Although I don't agree with tying 2 supplies together, I should be able to tie both rails together at the 4+4 conn and have effective 38A supply for the CPU.

edit: HAS THIS EVER BEEN TRIED?

[Oklahoma Wolf]

The EZ Plug is getting the same 12v rail the mainboard is - 12v1. The OCZ 600W is not capable of 38A@12v.

Topower has their own single 12v version of this unit (35A) known as the TOP-706P6, but I'm not sure how different they are internally. They also have a triple and quad 12v version of it. I believe the OCZ 600W is really the triple 12v model with a few mods.

[proth]

The EZ Plug is getting the same 12v rail the mainboard is - 12v1. The OCZ 600W is not capable of 38A@12v.

Topower has their own single 12v version of this unit (35A) known as the TOP-706P6, but I'm not sure how different they are internally. They also have a triple and quad 12v version of it. I believe the OCZ 600W is really the triple 12v model with a few mods.

I have a good list of supplies to choose from IF buying a new supply.

No offense,but I disagree with your statement of "The OCZ 600W is not capable of 38A@12v.".

The spec calls for 2 seperate rails with total current of 38A.
Thanks anyway.. :)

[Oklahoma Wolf]

There is a combined 12v limit of 35A - it will not do 38A (or 40A, as the new ones would have you believe) :p

Incidentally, the new ones have the combined limit printed right on the label... not sure about the old ones. Personally, I'm not even convinced they can hit 35A yet from what I have seen of their performance thus far.

[proth]

Thanks, I'll take the 35A for now. Will tie both rails together right before the 4+4 connector. Same thing as others tieing 2 seperate supplies together. Not an ideal situation but will have to do for now.

I don't know if other supply manufacturers get past 20A per rail by tieing 2 rails together "internally" using standard low power driver packages (TO-220, MW-25, etc...) or actually having twice the drive strength (Higher Power very expensive drivers).


EDIT: My feeling is the overload protection in the PSU will prevent it from starting because of basic laws I=E\R. If there is only a slight difference in voltage between rails, the rails are shorted and there is no place for the current to go.

[proth]

Talked to Bob and James @ PC&C and got a quick education on power distribution on multiple rail systems.

On GOOD supplies, the 4-4 Molex connector for 12v CPU power actually has 2 rails, 12V1 + 12V2 for eaxh core when you have a mobo and dual core CPU. Also found out that good mobos have entirely different 1.5v power planes going right to the CPU. Maybe the 8 phase ws board has 2 4 phase setups, 1 for each core.???

So this is actually better because of 2x18Amps, total 36A CPU power, better that the highly touted 35A+ single rail supply because higher current and isolation.

V3 on a 3 rail is for Video, CD, fans, etc if it's a 3 rail setup
I assume the OCZ 600ADJ-SLI is a "fake", simply having the same rail feed both 4-4 connectors, simply another set of cables coming out of the supply and not a seperate rail.

If anyone is interested, I'll rip the cover off and check out where all the rails go on he OCZ600 and post findings.