Wireless

ASUS has turned to the fairly pedestrian Intel Dual Band Wireless-AC 7260 choice, which offers 802.11ac wireless as well as Bluetooth 4.0 capabilities. Intel does offer a newer version of this in the 7265, but it is offered in less form factors, so some OEMs have kept with the older model to keep the form factor they prefer. It does offer 2x2:2 capabilities for a maximum theoretical speed of 866 Mbps.

WiFi Performance - TCP

The Intel solution has never been one of the fastest out there, and in the case of the ASUS G751 I achieved even lower bandwidth scores that I would typically see out of this card. Out of the box, ASUS is using a drive from June 2014, but upgrading to the latest driver from Intel did not really help. If you do need better performance, the G751 does have a Realtek Gigabit Ethernet port on it, which I was able to get about 800 Mbps out of.

Audio

The ASUS G751 has two speakers at the rear of the device which are not visible, and appear to be coming out of the rear exhaust vent. It also has a subwoofer on the bottom to help out on the low end. It also has a SPDIF 3.5mm jack to allow it to be connected to external speakers. The audio software solution is fairly basic, with some reverb effects and an equalizer available.

Sound output was right around 80 dB, which is generally plenty of volume for most use cases. Frequency response is OK, and the included subwoofer does make a difference, although it is still a far cry from a dedicated speaker setup.

Cooling and System Noise

On a gaming laptop like this, cooling may be one of the most important factors of all. With the most powerful single notebook GPU under the hood, and a 47 watt processor, the system needs to expel all of that heat without sounding like a jet engine at takeoff. The ASUS G751 has two exhaust fans at the rear, with one for the CPU and one for the GPU. There are three heat pipes to transfer the heat out to the fans as seen in this graphic from ASUS.

To see how the system performs when doing what it is meant to be doing, I loaded up Tomb Raider set on Ultra, which will max out the GPU. This was left for about an hour or so in order to see how the cooling system performs over time.

The cooling system has no issue keeping up with the demands of the GPU, with a maximum temperature of just 72°C over the hour. The GPU frequency is maxed out for the duration, so there is no throttling going on. But even with this excellent cooling, the system fan noise was not overbearing in the least. I measured 45.2 dB with the sound meter an inch over the trackpad, which is a pretty decent result when the sound floor in my office is 36 dB. I wish I could measure the sound frequency as well, but the fans are sufficiently large to keep the frequency low and unobtrusive.

The G751 is edged out in system cooling by the MSI GT72 which kept the GPU closer to 60°C, but 72° from the G751 is perfectly acceptable with a 100% GPU load which Tomb Raider provides. And it does this without generating excessive fan noise, or high temperatures on the laptop casing itself. I don’t have a thermal camera (yet) but my IR thermometer showed a maximum temperature of 37°C at the hinge end of the device, with the keyboard and trackpad area staying very close to ambient, which is about 24°C in my testing environment.

Software

ASUS has taken a pretty light touch on the software side, which is certainly appreciated. There is a bit of extra software included which is worth discussing though, starting with the XSplit Gamecaster software which is pre-installed, and even has a dedicated button to start live game streaming. ASUS provides an unlimited recording license with the laptop, and the XSplit software supports all of the major streaming services including Twitch and YouTube, and it also allows saving the gameplay footage to your hard drive if you want to edit it before uploading, or just to keep it for historical reference.

It also offers customization to what overlays are displayed, and if you hook up a support capture card you can even use it to stream other events such as your console, although both the PlayStation 4 and Xbox One support live game streaming out of the box. For the group of people that are in to game streaming (sadly I don’t count myself in this group) this is a nice value add on the G751.

ASUS also includes their Game Center software, and it can be accessed with a dedicated button as well, which is in place of the standard Number Lock on the number pad. It offers quick access to many of the utilities including NVIDIA’s GeForce Experience software. It is also the quickest way to access ASUS’s Splendid Color application.

Splendid Color offers three presets, with Normal, Vivid, and Theater modes, and there is also a preset for a custom mode that you can configure yourself. I like these preset options from the manufacturers, as it gives the end user an easy way to adjust the display. But since I’ve been comparing the ASUS to the MSI GT72 as a direct competitor, I do like the extra option in the MSI version of this software which allows a higher gamma which is useful when playing a very dark game.

Macro, Steam, and Game Streaming keys

Included software is generally added for either differentiation, or to increase margins (read bloatware), and ASUS has taken the approach to include useful applications. The game streaming add-on is always something you could add yourself, but for those that are into this, it’s nice to see it included, and with a dedicated keyboard button to launch it too. The combination of software and hardware is well done, and things like ASUS including three macro keys and the necessary software really display the focus on gaming with this machine.

Battery Life and Charging Final Words
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  • Meaker10 - Wednesday, July 29, 2015 - link

    Indeed, the only way to get around this is to do what MSI have done and have a manual switch and on reboot move the traces over and run in IGP mode (without G-sync of course).

    Asus also only had the later G750 with optimus, before they actually avoided it generally in their 17 inch models. So really for asus the optimus models were a blip rather than a trend.
  • nerd1 - Friday, July 31, 2015 - link

    Many laptops had hardware mux to switch GPU pre-optimus era (alienware had one) which is a way better solution than optimus.
  • nightbringer57 - Wednesday, July 29, 2015 - link

    As a matter of fact, everyone has been building some non optimus notebooks all the time.

    The Optimus technology requires the screen to be directly driven by the integrated GPU. Some custom technologies made by GPU manufacturers require the screen to be driven by the GPU himself. That's why the 3D laptops never sold, because Nvidia's 3D technology requires the screen to be driven by the nvidia GPU directly, so you can't have an Optimus-enabled 3D screen laptop (well, at least using nvidia 3D).

    The same problem is true for G-Sync. So you can't technically have G-sync and optimus on the same laptop.
  • BMNify - Wednesday, July 29, 2015 - link

    Exactly, the optimus tech even effects VR and you can't drive VR with igpu, many high end laptops are now coming without optimus due to customer demand.
  • BMNify - Wednesday, July 29, 2015 - link

    Optimus tech is reviled in the hardcore gaming community and gaming forums who pay $2000 plus for gaming laptops, many top-end gaming laptops have no optimus due to Customer demand !!
  • Notmyusualid - Saturday, August 1, 2015 - link

    ^ This is true.

    Many don't buy a machine due to the very fact that Optimus is there.

    However, I have a Dell M3800 HD4600/K1100M that has no issue with it.
  • boeush - Wednesday, July 29, 2015 - link

    OK, bit why would anyone buy this now, when Skylake is right around the corner? Wait another couple of months, and an equivalent model with a better CPU and DDR4 is all but guaranteed by the holiday shopping season. Or, at the very least, this particular model will be selling at deep discounts by then...
  • boeush - Wednesday, July 29, 2015 - link

    Not to mention, a premium laptop this far into 2015, and with not a single USB 3.1 port? Tsk, tsk...
  • meacupla - Wednesday, July 29, 2015 - link

    because, you buy it when you need it, not when there is something new 'in a couple of months'.

    A week, sure, that's not a long wait, but 2 months to launch means you're going to be waiting another 6 months until the replacement for this type of gaming laptop to appear on the market.
  • boeush - Wednesday, July 29, 2015 - link

    According to various leaks, Skylake H is launching in October. Skylake T (low voltage 35W i7 6700) is also launching about then or even sooner.

    Given that, why would anyone NOT expect all brands to refresh models with Skylake by Black Friday?? Any brand that fails to do that, is going to lose out huge this year.

    So sure, retail availability of bixed CPUs is October, but I'll bet all the OEMs have had samples under NDA since spring, and are working to deliver updated models on the same day as the CPU launch.

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