Asus ROG Crosshair IV Formula Preview

Introduction & Specifications







Asus ROG Crosshair IV Formula Preview

With the impending launch of AMD's range topping 890FX chipset as well as Phenom II X6 series CPUs, it's no surprise that we'll soon have a whole host of new motherboard arrivals on our doorstep. Having extensively tested Asus’ 890GX offering, we’re now eager to see what it’s bigger brother is capable of. Of course, if the 790FX lineup was anything to go by you’ll struggle to go wrong with most offerings. In the case of the 790FX, most of the boards in question offered respectable board layouts, similar feature sets, abundant cooling/power regulation and a fairly generous HTT Base Clock ability. We are of course fully aware that for many, the words “generous”, “respectable” and “abundant” simply doesn’t cut it... There are enthusiasts out there who take pride in purchasing only the bleeding high end, where only the cream of the crop is a worthwhile investment. This is exactly what Asus’ Republic of Gamers division is about.

By comparison, Asus ROG isn't too dissimilar to the BMW “M” or Mercedes “AMG” divisions of the motoring world, who specialise only in the production of high performance products. In this sector, value for money has little bearing, most notably so when the key requirements entail over engineered designs, radical styling and immense capabilities under extreme conditions. It's products such as these that are built to push boundaries and break records, be it lap times around a track or time to calculate in SuperPi.
Since the division’s launch in 2006 we’ve seen and tested a number of stunning products including the venerable Rampage III Extreme, Asus Ares and of course, the award winning Crosshair III motherboard. Given our colleague’s take on the Crosshair III, let’s see what improvements #4 has to offer.

Processor Support AMD Socket AM3 Sempron 100/Athlon II X2/X3/X4 and Phenom II X2/X3/X4 Processors
Chipset AMD 890FX / SB850
Memory 4 x DIMM, Max. 16 GB 2000(OC)/1600/1333/1066 Non-ECC,Un-buffered Memory
Dual Channel memory architecture
Expansion Slots 4 x PCIe 2.0 x16 (Operates in Dual 16x/16x or Quad 8x/8x/8x/8x)
2 x PCI
Multi-GPU Support ATi CrossfireX Supported

AMD SB850 Southbridge
6 x SATA 6.0 Gb/s ports

3rd Party SATA Controller.
1x e-SATA 3.0Gb/s
1 x SATA 3.0Gb/s 

LAN Supports one PCI Express LAN 10/100/1000
Audio Creative SupremeFX X-Fi 7.1 Audio
USB AMD SB850 Southbridge
- 14 x USB 2.0 ports (6 x Rear, 8 x Internal)

NEC USB3.0 Controller
- 2 x rear USB 3.0 ports


In terms of fundamental specifications the Crosshair IV doesn't particularly stand out amongst it's competition. However there is much more than meets the eye as like it's predecessor, you can expect a wide variety of additional "ROG" features. Among these features is the innovative ROG Connect, allowing the user to fully bypass the BIOS for CPU Overclocking. The end result is the ability to remotely overclock your processor "on the fly", over an intuitive software interface.
Other convenience features include one touch auto overclock and core unlock functionality, onboard voltage probes for multimeters and also an exclusive feature that remedies memory related BIOS POST issues. When you also consider that the Crosshair IV Formula includes Creative X-Fi Audio, USB 3.0 and full SATA 6.0Gb/s support, it's clear that a lot of thought has gone into the product. But wait, there's still more to consider. Let's have a sneak peak of the motherboard in the flesh...

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Most Recent Comments

30-03-2010, 13:33:15

But will i need a coolant after i unlock ??

30-03-2010, 14:23:58


the board does support core unlocking within the bios according to the msi website.

enter bios menu> CELL MENU> and change the UNLOCK CPU CORE into auto and enable ACC (advanced clock calibration)

I found ACC but there is no option like unlock cpu core...
and what option should i choose for or sumthng other

30-03-2010, 15:24:17

change ACC too auto :D
there is a unlock core option on one of my msi boards, but its just ACC renamed lol

30-03-2010, 19:31:33

I changed acc to auto..still showing 2 cores only..what to do now ?

even changed acc to all cores
still no luck :(

30-03-2010, 20:12:36

the unlock cpu core u were referring ..i found i dnt rem d name even thogh i just visited bios moments ago..
dere was option to change it to special..dat did d trick...
i changed it to special..
acc..all cores

and pressed f10..
dats it..d pc wont boot..
i tried starting pc after 1o mins still it didnt on..finally i had to clear cmos[theres a button on my mobo]
and den d pc started

30-03-2010, 20:20:06

went in d bios again...
d name is ec firmware which i changed from normal to special

dis time i changed acc to auto and den exited bios..same result pc wont boot..
so had to clear cmos again...

where m i goin wrong ?

30-03-2010, 20:48:17

the cpu you are trying to unlock has broken or defunctional locked cores so it's staying as a dual core and there is no other way around it.

30-03-2010, 21:21:16

so dats amd's fault or d shop's fault from where i bought it ?

30-03-2010, 23:00:39

To market the chip as a X2, AMD either disabled the other two cores or they were no good. Sounds like you god one with bad cores and thats why you can't unlock. No fault of AMD or the shop, unless the shop told you that it could be "definitely" unlocked. If you definitely want a 4 core chip then you have to buy a 4 core chip, otherwise its just a matter of luck when it comes to unlocking a X2.

30-03-2010, 23:23:10

Hard luck den :(
Will try again doin sum changes in bios again...
otherwise have o work with 2 option

thanx for all d replies guys

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