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Asus P5E X38 or Asus P5Q PRO P45

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June 30, 2008 9:29:32 PM

Hello!

Im building a new computer and its almost done, got all parts together except the motherboard.

I want a Asus board, and it most likely stands between:

Asus P5Q PRO, P45, Socket-775, DDR2, ATX, GbLAN, Firewire, 2xPCI-Ex(2.0)16
or
Asus P5E, X38, Socket-775, DDR2, ATX, Firewire, GbLAN, 2xPCI-Ex(2.0)x16

Other components:
e8400 dual core 3.0ghz
Radeon HD 4870
Corsair Dominator 8500 2x2gb

So basically i want a motherboard that supports pci-e 2.0 which both of them do.

But the x38 board is more expensive, so my question is; is it worth paying the extra cash for the x38 board?
Whats the difference between them both?

// Hansen
June 30, 2008 9:55:37 PM

The biggest difference is in the Crossfire capability of the boards. The P45 only runs crossfire at 8X-8X while the X38 runs it at 16X-16X. If there's the possibility of you wanting to go Crossfire in the future, then get the X38. There's other differences, but that's the money one.
June 30, 2008 10:18:00 PM

Quote:
But the x38 board is more expensive, so my question is; is it worth paying the extra cash for the x38 board?
Whats the difference between them both?


yes the X38 boards are more expensive. but it has been proved that that there is no major difference b/w crossfire running in 2*16X and 2*8X, i'd go for a P45 board since it has lower temperatures than the X38 based boards.
As for Asus boards, the P45 versions have the new EPU-6 engine with the 16-phase switching mode, so its better to go for a P45 based mobo whether you run in CF mode or NOT.

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July 1, 2008 1:55:39 AM

mindfields said:
Quote:
But the x38 board is more expensive, so my question is; is it worth paying the extra cash for the x38 board?
Whats the difference between them both?


yes the X38 boards are more expensive. but it has been proved that that there is no major difference b/w crossfire running in 2*16X and 2*8X, i'd go for a P45 board since it has lower temperatures than the X38 based boards.
As for Asus boards, the P45 versions have the new EPU-6 engine with the 16-phase switching mode, so its better to go for a P45 based mobo whether you run in CF mode or NOT.


As far as the 16 phase switching, that is only on the Deluxe as of right now, the Premium hasn't been released yet. the lower models, vanilla, pro, and E are 8 phase.
July 3, 2008 2:00:38 AM

TKpro said:
Actually according to Newegg.com the P5Q Pro uses EPU-6.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Under specifications all the way at the bottom right under features.

Newegg may be wrong though.


EPU-6 is an energy saving feature that I believe is built into the bios not the PVM.
July 27, 2008 7:05:47 AM

The Tweaktown article has some controversy to it and it might be slightly misinterpreted concerning the bandwidth.

Check out this article if you are interested in crossfire - depending on the resolution you plan to game at you might only experience marginal differences from the p45 and x38.

http://www.hardwarecanucks.com/forum/video-cards/8045-h...

I'm in the market for a p45, x38 or 48 mobo atm as well. I am looking budget so the p45 seems to be a better value buy for myself where I can live w/o the 5-10% possible performance hit.
!