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View Full Version : Compatible G74SX Power Bricks?



hirethestache
06-24-2013, 09:25 PM
The cable coming out of my brick is hanging by the wire (pun....intended?) and I want to get it replaced BEFORE it takes its final lap...I know, smart right?

Anyways, Ive been searching the forums and good ol' Goog's for a definitive answer, and havent really come across one. Are there any sub $50-$65 bricks that would deliver as good of performance as the OEM(link (http://us.estore.asus.com/index.php?l=product_detail&p=720)) brick?

hirethestache
06-26-2013, 02:31 PM
Bump. Anything?

Spook50
06-27-2013, 06:46 AM
I've been trying for a while to find a higher wattage output brick for my G74 as well. The one that it ships with is too close in spec to what the laptop draws in high performance mode, so it's having to work harder to provide enough power and it really gets toasty.

Unfortunately, I've had no luck myself either. Still looking though so I'll post something up if/when I have some success.

hirethestache
06-27-2013, 07:15 AM
So the power is infact being bottlenecked by the OEM brick? I had a theory that this was happening, but I dont have enough knowledge in the matter. good to know Im not just going crazy. What would we need, ideally?

JamesNgkk
06-27-2013, 08:18 AM
A 180w power brick will be more than enough. I was looking for one that would work with my G74SX too. Then i found out that the OEM power brink for G75VX is 180w and is compatible with my G74SX. I've been using it for the past few weeks. It power brink runs cooler, i was able to maintain a higher stable overclock.

hirethestache
06-27-2013, 10:36 AM
Awesome James, thanks for the info!

Spook50
06-28-2013, 08:21 AM
Huh, I wouldn't have thought the brick would be an actual bottleneck to the point of affecting overclock stability. I just wanted one that would last longer due to running cooler if it was capable of more wattage output than the stock one for the G74.

JamesNgkk
06-28-2013, 10:06 AM
Well, actually it does. It's been proven by someone else (not myself) that at maximum load even for stock clock speeds for the G74SX, the power draw is more than what the OEM brick can supply though by not much. It has been a known fact for awhile that Asus cheap out on the power brick for the G74SX.

Anyway, my personal experience is that i was only able to maintain a somewhat stable overclock of the GPU at 860 core/1600 mem/1720 shader with the OEM brick. Any higher and i would experience freeze and lockups. Sometimes even running at that clock speed, the game will exit to the desktop itself and reset the GPU to default clockspeeds. However after changing the brick to the OEM G75VX ones, which is 180w, i was able to maintain a stable overclock at 900/1625/1800.

So i may not be able to explain it well scientifically or technically but just based on personal experience, somehow a higher 180w output helped the G74SX to run more efficiently than the OEM 150w brick.

gypsymoth
06-28-2013, 11:44 PM
http://www.gearhack.com/Forums/DisplayComments.php?file=Computer/Notebook/Asus_FA180PM111_is_Not_Quite_the_Same_as_the_DELL_ FA180PM111

Spook50
06-29-2013, 09:18 PM
It definitely makes sense. I'm curious to put a watt meter inline between the brick and the laptop (especially after upgrading to a 180W unit) to see how much it'll pull at higher clock speeds when it has enough power available.

Too bad I'm not farther along in my electronics engineering course, because one of the later projects is to build a DC power supply that takes 110V AC power. Could've used that as an excuse to take a more in depth look at the power consumption of my laptop and reverse engineer the 150W one that came with it.

hirethestache
06-29-2013, 11:28 PM
Well this is reassuring. I bit the bullet and made the purchase on the OEM 180 brick. Also decided to swap out my perfectly fine 1920x1080 mirror...err, I mean screen, for the 1920x1080 matte.

Spook50
06-30-2013, 12:31 AM
Just for reference,

http://www.global-laptop-batteries.com/asus-ac-adapter/Asus-04G266009420-AC-Adapter.html $65

http://www.amazon.com/dp/B0096Y7O64 $54

http://www.laptopbatteryonline.net/180w-asus-04g266009420-g55-g55vw-ac-power-adapter-charger-p-23415.html $60 & free shipping

Didn't realize that ASUS's newer rigs used beefier power supplies, but that worked out great for sourcing better replacements for the G74's units.