Does the K7T-Turbo have a "4 phase power" system?

[Noriaki]

I've seen ABit talking about their 3 phase power system over most other people's 2....as far as I can tell the only difference is ABit uses 6 MOSFET power transistors instead of 4...

well I was looking at the K7T-Turbo review page 2 and it looks like there are 8 MOSFETs....does that make the K7T-Turbo a 4PPS ?

 

[Mark R]

But each phase needs a coil - and there are only 3 coils. One is usually reserved for a seperate power supply e.g. AGP power.

I'd say that this was probably a 2 phase supply, just like all the other MSI boards.

 

[Noriaki]

oh damn..forgot about the coils

Why do they have so many MOSFETs then....

 

[Mark R]

Maybe they run them in parallel to reduce current flow through each one: Doesn't give quite as good overall performance as another pair of phases, but saves the cost of coils and keeps the switches just as cool.

I can't really think of why they might need 8 mosfets for a conventional 2-phase regulator.

 

[Noriaki]

So then do you figure that the K7T-Turbo can take the higher speed Athlons...I've been hearing rumours floating around that you'll need a 3PPS to support the 1.5Ghz Athlons...do you know if there is any truth to this rumour?

 

[LXi]

There are actually 5 coils on the MSI, three around the MOSFETs and 2 on top of the PCI slots. Dont know if that'll make any difference.

 

[Biggs]

Has anyone e-mailed MSI regarding this?

 

[Adul]

I would like to know has well.

 

[NeonFlak]

Everyone except for abit is still using 2 phase.

 

[Biggs]

<< Everyone except for abit is still using 2 phase. >>



This hasn't been proven yet.

 

[DaddyG]

Its ridiculous to say that only ABIT uses a 3 PPS solution. Open your eyes, with KT133A 3 PPS is more common than 2 PPS.

 

[TungFree]

does one need a special power supply?
is the new Pentium 4 12 volt type power supply needed for this?
will the new Pentium 4 power supply work with an AMD T-Bird?
what are the differences of requirements in the new DDR 133 [thunferbird (C)] ?

TungFree

 

[slpaulson]

NeonFlak: seen the epox board or the iwill?

 

[Myrddin]

Here are the KT133A boards I know for sure:

3 PPS (phase power solution):
Epox 8KTA3
Abit KT7A

2 PPS:
ASUS

Don't know about MSI or others.

My understanding is that 2 MOSFETs = 1 phase. 6 MOSFETs = 3 PPS, 4 MOSFETs = 2 PPS.

There has been speculation that 2 PPS boards may have heat and power issues with Palmino and Morgan CPUs. No special power supply is needed, rather the 2 or 3 PPS has something to do with regulating the voltage to the CPU. More MOSFETS=less heat.

I am not an expert on this. Most of this information, while pretty accurate, has been drawn from other people like DaddyG and Dulanic on other threads.

 

[zippy]

<< There has been speculation that 2 PPS boards may have heat and power issues with Palmino and Morgan CPUs. >>


Yikes...anyone know if this is true?

If it is, I might be getting the MSI K7T Turbo instead of the A7V133. :Q

 

[Myrddin]

The vote is split on that. Dulanic says no, DaddyG says yes. Both are respected members of the forum community. I think Asus' 2 PPS probably will handle the CPUs but I'm glad I don't have to worry about it.

 

[Insane3D]

&quot;My understanding is that 2 MOSFETs = 1 phase. 6 MOSFETs = 3 PPS, 4 MOSFETs = 2 PPS.&quot;

Actually, you need a coil for each phase of a MOSFET power supply. There should be one coil per pair of MOSFETS. Just adding MOSFETS does not add phases without the corresponding coil.