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[Solved] Is there any Difference between the P8Z77-V and the P8Z77-V PRO? - Page 2

post #11 of 18
Quote:
Originally Posted by snipekill2445 View Post

Lots of text (Click to show)
I just read something else on the internet, saying that on the P8Z77-V, 8 phases are dedicated to the CPU, while 4 are dedicated to the iGPU.
And that on the Pro 12 Phases are dedicated to the CPU and 4 for the iGPU.

Most of internet reviewers don't have EE degree as Sin0822 here does. Guys that review these boards never go in deep what actually powers the VRM. In the end V has 4 phases doubled to 8 whether you want to trust that information or not is your choice.

Again I am only arguing about the fact that they are only 4 phases, but it won't necessary affect overclock.
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post #12 of 18
Quote:
Originally Posted by DeXel View Post

Most of internet reviewers don't have EE degree as Sin0822 here does. Guys that review these boards never go in deep what actually powers the VRM. In the end V has 4 phases doubled to 8 whether you want to trust that information or not is your choice.
Again I am only arguing about the fact that they are only 4 phases, but it won't necessary affect overclock.

Most reviews don't even mention vrm phases, Anandtech mention them sometimes, Tom's list them but just Phase#, never mentions what type they are and how they are rated, or if they use doubler or not. I never noticed the difference until I started reading Sin's reviews.
Edited by sherlock - 10/11/12 at 9:27pm
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post #13 of 18
Quote:
Originally Posted by sherlock View Post

Most reviews don't even mention phases, Anandtech mention them sometimes, Tom's list them but just Phase#, never mentions what type they are and how they are rated, or if they use doubler or not. I never noticed the difference until I started reading Sin's reviews.

Exactly my point thumb.gif. Therefore manufactures easily deceive people by such statements.
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post #14 of 18
Thread Starter 
FYI, I wasn't reading review... I was reading this stuff written by guys who focus only on features on specifications.

And what do you mean by "4 phases doubled"? From what I can see, there are 8 physical phases on the board.
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post #15 of 18
Quote:
Originally Posted by snipekill2445 View Post

FYI, I wasn't reading review... I was reading this stuff written by guys who focus only on features on specifications.
And what do you mean by "4 phases doubled"? From what I can see, there are 8 physical phases on the board.

Let me show you this paint diagram....


If you find a picture big enough of P8Z77-V VRM, you should see that the PWM chip has traces too small square looking things called doublers, after that it leads to mosfets and etc.
You can't count phases just by checking mosfets/inductors.

The problem with doubling is that they cut the switching frequency of the phase by half every time it's used. So in the end generally speaking we still have the number of phases before they got to doubler.
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post #16 of 18
Thread Starter 
So do all motherboard have doublers?
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post #17 of 18
Some do, some don't.

If you see something that pretends to have 8 or more phases, you can begin to doubt. There are very few boards with 8 phases such as UP5, UP7, Maximus V Extreme, and P8Z77-V Deluxe, Premium, WS if Z77.

Most Z77 boards that advertised to have 8 phases, have 4 true phases.

If you see something with 10 or more phases, it's 100% uses doublers.

Most boards now use either 4 phase or 6 phase PWM with doublers (like my UD5H has 6 phases doubled).
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post #18 of 18
Did you not read the link I attached which Sin created showing the details...
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