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What is it I'm hearing about "4 phase power" and "8 phase power"? - Page 2

post #11 of 44
Quote:
Originally Posted by Havokr505 View Post

Generally speaking, to count the amount of power phases, u count the amount of chokes because there should be one per Power phase...
this works for most boards/video cards/anything with VRMs

sometimes, they are arranged weird, and counting will be innacurate though
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post #12 of 44
my Rampage II has 16+1.
    
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post #13 of 44
Quote:
Originally Posted by Yoko Littner View Post
my Rampage II has 16+1.
i thought it was +2
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post #14 of 44
maybe?

In what situation's would 16+2 be good?

Quote:
Originally Posted by reflex99 View Post
i thought it was +2
    
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post #15 of 44
when you are using overkill amounts of vcore, pll, and vtt voltage
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post #16 of 44
Quote:
Originally Posted by Redwoodz View Post
In a nutshell an 8 phase distributes the CPU power through 8 VRM's vs 4.By using 8 smaller ones rather than 4 large ones the heat is kept lower due to the greater surface area.4 phases tend to overheat or even catch fire if they are not cooled properly or run over spec.
To add to this, we usually recommend 8+1/8+2-phase CPU power for 125W TDP processors (though a quality 6+2-phase would work fine as well), especially for overclocking, because with 125W the VRMs have to supply the most power. It's usually 125W TDPs + weak power phase (i.e. 4+1) that experience the blow ups.

The "+2" is the split power phase for the integrated memory controller, if you have 2 phases for that it would be better for pushing the CPU-NB voltage/VTT voltage far, as well as pushing the clocks on those.
post #17 of 44
Quote:
Originally Posted by xd_1771 View Post
To add to this, we usually recommend 8+1/8+2-phase CPU power for 125W TDP processors (though a quality 6+2-phase would work fine as well), especially for overclocking, because with 125W the VRMs have to supply the most power. It's usually 125W TDPs + weak power phase (i.e. 4+1) that experience the blow ups.

The "+2" is the split power phase for the integrated memory controller, if you have 2 phases for that it would be better for pushing the CPU-NB voltage/VTT voltage far, as well as pushing the clocks on those.
It would depend on the quality of the power phases of the board itself too though, wouldn't it?

I mean, the MSI boards are a typical example of weak 4+1 power phases blowing up on heavily overclocked Thubans, but on the other hand, the Biostar TA890FXE also has a 4+1 power phase setup, yet it's completely fine. The Gigabyte 890GPA-UD3H and ASRock 870 Extreme3 also seem to do fine with overclocked Thubans.
post #18 of 44
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post #19 of 44
Quote:
Originally Posted by mrcrusty View Post
It would depend on the quality of the power phases of the board itself too though, wouldn't it?

I mean, the MSI boards are a typical example of weak 4+1 power phases blowing up on heavily overclocked Thubans, but on the other hand, the Biostar TA890FXE also has a 4+1 power phase setup, yet it's completely fine. The Gigabyte 890GPA-UD3H and ASRock 870 Extreme3 also seem to do fine with overclocked Thubans.
the 890fxe has a 5+1, not 4+1 set up. but you're right, it does well with few.
post #20 of 44
Quote:
Originally Posted by mrcrusty View Post
It would depend on the quality of the power phases of the board itself too though, wouldn't it?

I mean, the MSI boards are a typical example of weak 4+1 power phases blowing up on heavily overclocked Thubans, but on the other hand, the Biostar TA890FXE also has a 4+1 power phase setup, yet it's completely fine. The Gigabyte 890GPA-UD3H and ASRock 870 Extreme3 also seem to do fine with overclocked Thubans.
Quote:
Originally Posted by Spicy61 View Post
the 890fxe has a 5+1, not 4+1 set up. but you're right, it does well with few.
The TA890FXE is actually 6+1 lol.

I owned one.

And 4+1 isn't "bad", it is just how certain brands choose to implement it.
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