Hot on the heels of the Maximus 4 Extreme comes the “Z” variant from Asus. The “Z” variant, as the name suggests, is built around the Z68 PCH. Will this be another hit for the Asus Republic of Gamers series? Read on to find out.

Quick Facts

Socket  LGA 1155 / Z68
Processor Support  All current LGA 1155 processors
 Segment  Enthusiast
 Size  E-ATX
 Memory  DDR3  4 Slots / 32GB
 Features *NF 200/PLX chips*4 PIC-e x16 slots;*Digital Voltage Regulation (Digi+ VRM)

*8+3+4 Power phase design (CPU/Mem/iGPU)

*Probelt Voltage monitoring points

*Dual Intel LAN

*Dual EFI

*Remote computing (ROG Connect/ iDirect)

*Onboard Power & Reset Buttons

*Onboard Switches to control PCI-e x16 slots

*Onboard diagnostic LEDs

*10 USB 3.0 Ports

*LN2 switch

*Bluetooth module

*Thermal monitoring cables

 Slots PCI-e x16 (4) (Proprietary bandwidth setting)PCI-e x1   (1)PCI-ex4   (1)
 Over-clocking  Yes (Both Processor and Graphics Core)
 I/O USB 3.0 ports (8)SATA 6Gbps Dual Intel LANROG ConnectClear CMOS Button

This E-ATX is absolutely loaded to the brim. It features NF200 as well as a PLX technology 8608 chip to provide extra PCI-e lanes.

Packaging & Accessories

The board is from the Asus Republic of Gamers series and comes in a traditional (read: humongous) ROG box.

The box has a large central window which shows a bit of the board.

Inside the red cardboard container is a clear transparent plastic shield which protects the board. Below the board is cardboard container which holds all the accessories.

The board comes loaded with accessories and extras. Apart from the usual manuals, disk, cables, USB 2.0 module and Asus “Q” accessories the package contains a Bluetooth module, a set of decals to label optical drive cables, SLI & XFire bridges, temperature monitoring cables and probelt connectors. There are some cable ties in the package as well.

What is missing is a front USB 3.0 box. This is something that Asus includes in its P8 series boards, but surprisingly omits it from the ROG series.

Motherboard Tour

Like all ROG boards, red and black colors are liberally used all over the board.

This full length E-ATX features high quality components for CPU and memory power regulation. 8 phase CPU power, 3 phase memory power and 4 phase iGPU power regulation circuitry employs the best components. All power circuitry is passively cooled. The heat sink that cools the NF-200 has a nifty ROG logo that is illuminated by a red LED. All heat sinks share a common heat pipe.  The voltage regulation circuitry is covered by passive heat-sinks connected by a heat pipe. Despite the presence of heat sinks, the board can take almost any aftermarket cooler without breaking a sweat. We tested our setup with a HR-02 and had no problems installing it.

In front of the socket area are the memory slots which feature the excellent single clip retention mechanism.

A lot of goodies are located in front of the memory slot. The diagnostic LED display, probelt, power & reset buttons, the LN2 switch as well as the PCI-e x16 slot switches are located here. A small red mem OK! button completes the tour of this area. Probelt allows direct measurements of all essential voltages.

Moving along the front edge we find the 8 SATA right angled ports. The red ports are SATA 6 Gbps compliant while the grey ports work at SATA 3G Gbps specifications. The extra SATA 6 Gbps ports are powered by a Marvell controller. E-SATA functionality is provided by JMicron IC.

The left edge of the board is very busy. It features the front panel connectors, USB connectors (2x USB 3.0 and 8x USB 2.0) and a clear CMOS button.

The Z68 PCH is covered by a low profile heatsink and should not interfere with extra-long add-on cards (read GPUs).

The board features 4 PCI-e x16 slots. Although enough lanes are available to offer x16/x16 mode in a dual GPU configuration, Asus limits bandwidth to only x8/x8 on slots 1 and 3. This is done to bypass the NF200 which improves latency and over heads required to pass through the bridge chip. Asus recommends using these slots for dual GPU configurations.

Though the end user can simply use slots two and four to gain full x16/x16 bandwidth but that would incur the additional overhead as the extra lanes pass through the NF200 chip.

In a three card configuration the PCI-e lanes are organized as x16/x16/x8 utilizing the power of the NF200 bridge chip.

Confused? Don’t be; the following table lists how the x16 slots are allocated PCIe lanes

PCI-e x16 Slot PCI-e Lanes  Comments
 1 & 3  x8 & x8  For Dual GPU setups
 2 & 4  x16 & x16  For Tri+ GPU setups

Additional PCI-e lanes are provided by the PLX 8606 chip. This helps power the bandwidth for the 10 USB 3.0 included on the board without compromise!

Apart from the usual 24pin and CPU 8pin power connectors the board features 4 pin molex connectors to provide extra power for the PCI-e x16 slots.

The board has 8 fan connectors! There is the CPU fan connector, 3 chassis fan connectors, 3 optional fan connectors and 1 power fan connector. All provide PWM (Q-fan) control.

There are three strategically located thermal sensor connectors. They can be used to monitor temperatures of various components on the board or in the chassis.

The most striking aspect of rear panel connectivity is the absolute lack of USB 2.0 ports. All the ports (8) here are USB 3.0 (powered by NEC). There are 2 E-SATA ports, dual Intel Ethernet ports, traditional PS/2 mouse & keyboard hybrid port, digital SP/DIF port, ROG connect port (a USB port in reality) & switch and the traditional audio ports.

Just in front of the rear panel I/O is the internal header for two more USB 3.0 ports though no rear or front panel USB 3.0 headers are provided.

What is more shocking is the utter lack of any video outputs. Even if the end user wants to use the GPU integrated on the processor die he (or she) must plug in a discrete GPU. Lucid’s Virtu software will then take over GPU switching as the user desires (in conjunction with the settings in the EFI).

The board is identical to the non “Z” version of the M4E. The only difference is the PCH used. This is not essentially a bad thing as the M4E itself was well laid out and was easy to work with.

Lucid Virtu

Lucid is a company that specializes in multi display technology, its primary product, Hydra, made a name for itself by providing hardware base support for asymmetric multi GPU processing. Lucid also provides a software solution for the Z68 chipset that allows the concurrent use of onboard and discrete graphics dubbed “Virtu”. In “i-mode” the video display is connected to the onboard video output. This allows the concurrent use of both display hardware (in the CPU as well discrete video card) setups. This allows the use of integrated GPU for video conversion (via Quick Sync) and gaming on discrete GPU at the same time. The problem is that, as the output is connected on integrated GPU; all information from the discrete GPU must pass through the integrated GPU’s frame buffer. As the software must intercept what is being run on discrete GPU Lucid must update Virtu for new games (or otherwise) that are released.  The following flow sheet shows how this is done:

If the video output is connected to the discrete GPU (the “d-mode”), the user gets the absolute best discrete graphics performance as all graphics data does have to go through integrated GPU’s frame butter. Quick sync is still available in d-mode.

The advantage of i-mode is power saving as well as access to both discrete and integrated graphics. The disadvantage is a performance hit on discrete graphics performance (which could be up to 40% especially in gaming). The advantage of d-mode is absolute best discrete GPU performance, SLI and XFire availability of integrated graphics (for quick sync). The disadvantage is considerably greater energy consumption.

It must be noted that Virtu is a requirement for dual GPU use. Intel does not provide its own solution to this end.

The M4E-Z does not come with any onboard video outputs. Thus a dedicated/discrete (dGPU) GPU is required to make use of the on die graphics core. Lucid’s Virtu software together with the EFI controls what graphics core is being utilized.

Improved Hard drive Performance (Smart Response Technology)

The other feature of the Z68 is its ability to improve hard disk performance by using an SSD as an IO cache for the hard disk, what Intel calls Smart Response Technology (SRT). This is not a hardware feature. Intel can make it available to P67 users as well.  Intel’s RAID driver controls caching. It is a pity that Intel is trying to ‘strong arm’ customers into buying a new product whereas the old product can do just a good a job! Intel allows a maximum of 64GB of SSD space to be used as cache. Any remaining space can be treated as a physical drive.

Intel’s driver allows for either a ‘enhanced’ mode (minimal benefits, maximum security) or ‘maximized’ mode that offers maximal benefits, but if the SSD cache dies (for whatever reason) it could have detrimental impact on your hard disk.

Intel offers its own 20GB SLC SSD to be used with Z68 boards as cache.

Utilizing a GSkill SSD (link to G.Skill SSD review) based on the first generation SandForce controller we tested how our OS boot times (from Starting Windows screen to Login Screen, see system specs below for more information) would improve by using this drive as a cache

With SSD  Without SSD
 43 Seconds  65 Seconds

An improvement of about ~35%, not too shabby!


Rather than offering a basic view, the EFI throws the user right into the mix of things. This is expected of a high end board such as this. The board offers complete control over over-clocking; you won’t find an easier to use EFI than Asus’ implementation (not only on this board but on all Asus board compared to others). To enable Virtu the ‘initiate iGPU’ must be set to ‘enabled’

Software & Over-clocking

Asus bundles the board with AI Suite II (ROG edition). This is akin to MSI’s control center and offers an all in one solution to over-clocking and monitoring.

It is possible to utilize automatic over-clocking via Turbo-V, or manually.

The latter will be the favorite amongst many of the board’s potential customers.

Over-clocking the processor is as easy as a pie and very similar to all other Asus P8Px series boards. The settings are exactly the same as those in the M4E EFI with the addition of over-clocking parameters for the iGPU.

We reached 4800 MHz an all-time low voltage of 1.376V on the M4E-Z!

 Note: It is highly recommended that the latest version of AI Suite II be used. This can easily be downloaded from Asus’s support website.




Testing motherboards is not an easy task. No matter what types of test are done the CPU’s performance does come into play. Testing IO is basically only testing the ability of the PCH. Thus what separates motherboards these days is their ability to provide functionality you need (read over clocking potential, RAID, multi GPU setup etc). But as the saying goes; when in Rome do as Romans do; we’ll put up some numbers to prove that we did spend time testing the board to dissect the ‘quantum’ difference between it and its peers!

For a motherboard like the M4E-Z, its feature set alone determines its potential customers. Those desiring multi GPU full speed functionality, features to aid extreme over-clocking take precedence over benchmark numbers. It goes without saying the board will perform, but as has been seen before these numbers are not enough to determine which is the best as they all end up performing the same.

System Specs

Motherboard Asus Maximus 4 ExtremeAsus Maximus 4 Extreme-ZAsus P8Z68 DeluxeAsus P8Z69 ProAsus P8P67Asus Sabertooth P67MSI Z68A-GD65MSI P67A-GD65

MSI P67A-C43

 Processor  Intel Core i7-2600K
 Video  HIS 6950 2GB
 Memory  G.Skill sniper 2x4 GB (1600MHz; CL 9; 1.25V)
 Hard Disk  Seagate Barracuda 7200.11 1TB
 Power  Thermaltake Tough Power XT 775 Watts
 OS  Windows 7 (Service Pack 1)


 Synthetic  Sandra 2011X264 Benchmark (HD V3)Cinebench3DMark11 –Physics Test
 Real World  7-ZipFar Cry 2Crysis -Warhead
 IO Performance SATA –HD TuneUSB –Crystal Mark 3


 S67  Asus Sabertooth P67
 P67  Asus P8P67
 C43  MSI P67A-C43
 GD65  MSI P67A-GD65
 Z68GD65  MSI Z68A-GD65
 Z68P  Asus P8Z68-V Pro
 Z68D  Asus P8Z68 Deluxe
 M4E-Z  Asus Maximus 4 Extreme-Z
 M4E  Asus Maximus 4 Extreme

All benchmark indices are rounded off to the nearest 0.



Sandra is a very competent stress testing and benchmarking suite.

The Maximus-Z does what the other P67 (and Z68)boards do, perform extremely well! It apes the Maximus (4E) to perfection

X264 HD V3 & Cinebench R11.5

X264HD benchmark measures the encoding performance of the processor. It offers a standardized benchmark as the clip as well as the encoder used is uniform.

Cinebench is based on Maxon’s Cinema 4D. It is used to compare graphics as well as processor performance.

There is nothing new here. The numbers that we saw with our very first LGA1155 review (LINK to Sabertooth p67 review) are the same we are seeing today.

3D Mark 11 – Physics Test & Games

This is the latest incarnation of one of the oldest graphics benchmarking suites. The latest incarnation supports DirectX 11. It has a physics test that emulates physics on the processor.

 Again the M4E& M4E-Z leads the pack, but not by much (despite how the graph depicts the 50 points lead!)


The base line for all tests is a Core i7-950 processor running at its default speed (100%)

Far Cry 2

 Far Cry 2  1680x1050
 Benchmark  Inbuilt ‘Ranch Small’ CPU
 Rendering Path  DX 9 –Medium

If it weren’t for the MSI P67-C43 this would have been the easiest graph to read.

Crysis -Warhead

 Crysis -Warhead  1680x1050
 Benchmark  Customized
 Rendering Path  DX 9; Physics Set to Enthusiast

The differences are minor enough to be ignored. Just like all the benchmark results shown so far.


Some might argue against using 7-zip’s compression and decompression benchmark as a ‘real world’ test. But if you try and think about it for a minute, the benchmark does show how fast the program will either compress or decompress, while negating the impact of disk transfers.




The Extreme-Z is up there with the best, but the rest are not miles off either!

IO Tests: Storage

USB Tests

USB performance was compared between boards. Crystal Mark V3 was used in conjunction with a USB 3.0 compliant Kingston Data Traveler (Ultimate 16 GB)

SATA Performance

HD Tune was used to assess SATA performance.

To make things as fair as possible only Intel powered SATA ports were used during testing. And as all the ports are coming off the P67/Z68 PCH, the performance thus is the similar. If Intel’s SSD cache technology (on Z68) is taken in to consideration, it would lead the pack.

Result Impressions

The board’s results mirror those of other P67 and Z68 boards reviewed by WCCFTech. The MSI P67-C43 (link), P67-GD65 (link) and the Z68-GD65 (link), the Asus Sabertooth P67 (link) and P8P67 (link)all have shown similar benchmark performance.


Like the M4E, the M4E-Z is loaded; the board is feature rich. From NF200/ PLX chip combos for extra PCI-e lanes to provision of up to 12 USB 3.0 ports the board has it all. The all-important question is how important are these features to you? As you have seen the performance difference between various LGA 1155 boards are negligible at best. It is the features that set these boards apart.

For those looking for the absolute best in Z68 implementation you have to look no further. The bus stops at the M4E-Z!


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