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Power design or how many phases?

post #1 of 4
Thread Starter 
Hello, guys. Can you tell, how many phases should motherboard for regular overclocker contain? For example, Gigabyte z68 boards (+ 2500K 4.0-4.5Ghz). Z68X-UD3P-B3 has 12 phases; it's hi-end power system; no problem with it. But UD3-B3 has less phases (only 6, if I'm right) and motherboard is cheaper, of course. So, I wonder, what board I really need. Should I save money and get that board with 6 phases or not?

P.S. It's just example. I will build system with Ivy Bridge and z75 board, but I want to understand how to choose power design for modern overclockable CPUs.
post #2 of 4
The more phases a motherboard has, the more you can overclock and also the power is delivered more precisely. This means you could even get higher performance.

So don't get the UD3-B3, get the UD3P-B3. The P stands for Performance.
post #3 of 4
Quote:
Originally Posted by Nicolas11x12 View Post

The more phases a motherboard has, the more you can overclock and also the power is delivered more precisely. This means you could even get higher performance.
So don't get the UD3-B3, get the UD3P-B3. The P stands for Performance.

Not exactly.... the number and type/quality of VRMs matter.

Additional and better quality VRMs allow the motherboard to deliver more power to the CPU. The quality, quantity, design, and load determine how accurate and precise the voltage is provided.

More current and a more stable voltage may lead to higher overclocks.

I would not get the higher priced model just because.... see what others are clocking to first on the UD3-B3.
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post #4 of 4
Both boards use the same FETs and inductors, different PWMs, the UD3P should have 6+1 phase while UD3 should have a 4+1 phase.
GIGABYTE gave their low-end P67 PowerPAK MOSFETs(22A per phase), BUT for Z68 they gave their low-end DrMOS(35A), which have higher current capability and better thermals. So compared to P67 the Z68 GIGABYTE low-end have better MOSFETs and thus lower phase count. I have a Z68X-UD3H has 4+1+2 phases it can do 4.5ghz for 24/7, the only issue is idk how much higher for 24/7 it could do. If you are looking for over 4.5ghz 24/7 go with the UD3P.

the UD3P and the UD3 in this instance have the same quality MOSFETs and Inductors, and capacitors.

But to be honest, i can explain the VRM quality more in depth for you. just give me a few minutes to write it up. Quality and count are two very different things. You cannot compare phase count to phase count going from a tier #1 company to a Tier #2 or #3 company. Just because its lower phase could also mean its just lower phase of the same quality. If you are talking about a ROG board, then it isn't like that however.

Also for Ivy, phase count wont really matter at all. Period. You can have a 4-phase system push a ton.
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