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G750 Series - Anyone can record their CPU Fan Noise? Please?

Level 7
My laptop: G750JZ - with 4700HQ.

I would like to ask a favor from you guys.
I have a very, very loud CPU fan. It's like having a hairdryer all the time behind my screen.
But it sounds intentional like it's not broken. (I hope it is, though.)

With my phone, sound meter shows 60dBA coming out, and this is full speed.
Which, is reached even when playing ARMA 3 which is a one core using game.
Heck, even if Windows updating or does something in the background this jet engine can spin up.

I want to know if it's normal.
Just please record the CPU fan under load, and post a .mp3, or youtbe link, whatever.
You can also PM if you want.
If you don't know how to do this, just download any sound recorder on your phone, and run "Prime 95" (free) program on your PC for a bit. Ten seconds even will do I guess.

Thank you!

Level 7
Today I took the matter in my hands.

1) Ordered a CPU fan earlier. When it arrived, I checked, everything matches. All logo/numbers, etc.
2) Took the laptop apart.**
3) Replaced fan.

Now the new fan is much quieter.
- The old one was able to turbo a bit more.
- The old one brought out a lot hotter air.

I was extremely careful with the repair.
My suspect is the thermal paste. But there is a little "warranty void if removed" sticker on the CPU, so I cannot repaste it.
Again, I am not even sure if I have warranty. IF I ever had, since I had to take it apart to even install my own memory. (LOL)

So now I will put the old fan in, and take it to ASUS.
Now the question, why didn't I do that in the first place?

I did. My previous ASUS.
Service broke more than what they repaired.
They broke several plastic parts inside, scratched the laptop, etc.
And the one thing they replaced OK, also broke months later.

But hey, what can I do. If I don't take it back, the CPU will fry sooner or later anyway.
The new one cannot cool it because I can't repaste or I don't even know what's happening.
The old one cannot cool it because it almost breaks when it tries to run.

** I mean, wow. It's the worst design ever. The engineers at ASUS did everything they could to make this machine break as soon as possible, and to make it very hard to repair.
If you have not took your machine apart ever, you have to remove ALL the screws, there is plastic everywhere, etc.
It's a nightmare.

And before you even dream of taking it apart, get one of those iPhone repair kits for 1$ on eBay.
The plastic prying tool is a must.

Now you must ask, "but every laptop is like this". No.
I had a ThinkPad. And a Dell.
It took around 5-6 screws to dismantle the machine.
In 10 minutes, you have the motherboard in your palm, ready to cleaned, fixed, etc.

THIS monstrosity? Oh my god.

Before you get angry about "wow stop hating", the only impressive about the laptop is the GPU cooling.

That component deserves the "ROG" name.
It's clean, does the job, clever design.

The rest? Is junk.

Plastic, junk quality keyboard.
Screen is just okay. Granted, you can buy 4K/120hz, etc panel fitted ones, so this is "OK".
The CPU cooling is junk. If they have done a proper job at the GPU, why they can't cool the CPU better?
The whole system design is junk. Like they delibaretely added as many screws as possible.

The software features such as "AudioMaxx" which was great, only worked for some time.
Even on Windows 8.1 it broke after some update, and I tried around 10-14 drivers, never managed to bring it back.
On 10 I tried the drivers too, there is a tab for it in Realtek, but it does not work.

Now ... "But this is just how ASUS does things."
False. The previous G75 (?) series had vent doors on the back for both fans.
And maybe the RAM was also accessible.

I can't even imagine how hard is it to repair a G752.
Maybe a crowbar is a musthave tool for a repair there.

I am sorry, if anyone asks, I would not recommend ASUS ROG laptops.

I just undervolt mine. Asus uses absurdly high voltage on the cpus. If undervolted the temps are good. Try that first.

The G752 has an access door for RAM / hard drive upgrades. *shrug*

I've never opened up a ROG, but I have fixed a fail number of Dell and HPs. Honestly, nothing is all that easy. If you had to do a repaste on most laptops, it would be pretty time consuming. From appearance, it wouldn't be as hard as the ROGs look, but not much easier either.

One of my newest favorites is an HP business class EliteBook. The entire bottom panel comes off in about 2 seconds. Nice and easy for upgrades and cleaning. :cool:

So, sorry everyone I was quite busy with life...

Here is my reply:
@miguel pereira: After the fan replacement my laptop is 100% quiet. It never reaches even the "faster" zone, let alone the "panic" one when it goes full speed.
Hell, most of the time there is NO fan movement at all.

@Buggsy: Plastic cheap Dell/HP/Lenovo, they are all the same. Plastic pry tools, and hope they don't break apart.
But Dell Latitude, Dell Precision, Lenovo ThinkPad, HP EliteBook.... they have signals on the back for each component acceess.
You want to take apart the ENTIRE machine? Done. 6 screws, and it falls apart.

No gimmicks, no plastic crap, just a few screws. And yes, these machines conform to Military Standards, so no, they are not any weaker.
In fact, these are a lot more durable.

To answer my post:
- There are many ROGs sold with bad fans. You can get cheap ones on eBay, they are like 20$.
All fans have noise, but if yours is too loud, it's probably a defect.

- There is no use in cleaning your fans! I was shocked! I cleaned both fans by taking the top off several times during the years.
I used a tooth pick to keep the fan still, then used compressed air to clean it out. All the dust went out, so I was like "that's done".
Guess what? I was wrong!

The fin spacing is SO short, like 0.3mm, or so, that the dust will "catch on" and there is no way to remove the dust unless you REMOVE the FAN!!!
I am not making this up.

So how do you take this monstrosity apart?

I thought I will do a video on it, but I don't have a GoPro and a headstrap.
So here is a few tips, that will help you.

- Before you start, and you want to lower fan noise, just order a set of fans.
It's cheap, really. And you can't do harm by replacing it. They are just "taped" there.

- Get thermal grease too beforehand. Arctic Silver, or any "good brand" will do.
It's a waste of time to read reviews, difference is very negligible, 1-2 degrees at most.

- Get a plastic prying toolkit. It's a "phone repair kit", "iphone repair kit" and so on, on eBay, Aliexpress.
Get the 1-2$ ones, you do NOT need expensive toolkit for this job.

- Get a magnetic screwdriver. A longer screwdriver is better, some places are hard to reach.
And you don't have to apply too much force anyway.

- Get A4 papers (around 10), get a pen.
Usually 'tidy' repair guys use these plastic bags, label screws, yadda yadda.
It works. IF the machine is not a mess like the ROG laptops.

The way I won this fight is by drawing a layout of "what I see".
I literally draw circles on a blank paper, and put the screws on the paper itself.
YES you have to be careful that no one or nothing will touch these papers while you work.

But seriously, it's so much easier than labeling and using bags.

- DO NOT PRY WITH METAL TOOLS!!! This way you will just break a few parts.



- Turn off laptop. Remove AC power.

- Remove battery. (you should have it removed anyway when you use it stationery)

- Pop each rubber out, there are plenty around. I just placed them on the paper too.
Remove screws, they will come out nice and easy.

- Pop the rubbery cover on "that" screw. The one that holds the "bay" in place.
There is a screw behind that. It's a "C" screw, same as the one that holds in your DVD BAY. More on that later.
Use a pry tool to remove the bay cover if it's really stuck.

- Remove ALL screws in the bay you see. There are "A", "B", "C" labeled ones.

- Once you remove the "C" screw on the top-right part of the bay, you can remove your DVD drive.
I think you can just pull it out, but yeah, apply common sense here.

- There are another 3 screws under the DVD place, yay! Remove them.

- Flip the laptop back, open screen.

The thing above the keyboard, is another plastic thingie.
You can use a prying tool to open (!) that cover. Again, careful.
You cannot remove it, there is a cable connected to the motherboard from it.
Just place it gently behind the laptop as the cable lets you.
The reason we removed it, it will reveal the (another) two screws that hold the keyboard.
Remove those screws.

- Now grab a plastic pry tool, you can just pry off the keyboard literally.
Find a place around where you can get into it, slide around the tool carefully, popping out each "flap" one by one.

DO NOT "yank" the keyboard out, there are 4 ribbon cables connected to it.
Lift the keyboard with one hand, and carefully, using one of the tools, or finger, whatever, disconnect the cables.
It's not rocket science, but be gentle.

- Now we are getting there. And here comes the hard part (HA!).

- Then now it's time for left side. And screen.
Remove the WIFI connectors. It's a black and white cable, top left part, near CPU fan.
These can be "popped off", nothing fancy.
Screen has like 3-3 screws on each side, under that cover we removed.
Remove screws, and motherboard connection. Congratulations, you have your screen in your hands.

- Now here is a tricky one. The TOP-LEFT USB extension.
You could remove the cable. If you could.
It's one hell of a construction, I didn't remove it. I was scared I will break something.
So I simply removed the DVD drive holder 'cage', and the microSD extension at the bottom.
This allowed me to lift out the USB extension simply, leaving the connection intact.
Remove screws when needed of course.

- Now the motherboard.
Remove connections.
* Mid-bottom has two blue-colored "strong" cable. Easy to remove.
* Bottom-left has one power cable. Be careful!

- Now the screws. AGAIN!
You have to remove ALL I repeat ALL THE SCREWS.
It's a LOT.
And make sure to take pictures, and good drawings.

So. Some screws have a "dot" near them, some have a little arrow.
Makes no difference, they are all our enemies now.

- There are two special parts on the motherboard.
One is the power button. It's on the top-right part of the mobo.
Remove the screws on it, and gently wiggle it off from the motherboard.

Second is the sound ports.
Again, screw, then wiggle it off.

- Once you remove ALL screws, you can practically lift out the motherboard.
Make sure you always check that there are NO screws holding it in place anywhere.
Be gentle, use your head, common sense. Combine the powers!

I held the motherboard at the fans, those had the most rigid structure.
Pay attention to the right side ports.

- Phew. You have a motherboard that is very fragile, and very pricey.


- The fans are held in place with a simple tape. It's a strong tape though.
I simply took it off, then used a regular tape to hold it in place again.
So anyway. Once you remove that tape, you can just move the fan, remove it by hand.

The power connectors SUCK, be careful NOT to break them.
My original connector broke and trust me, I was careful.
Of course they are no standard connectors either. 😉 (asus_winkyface.gif)

- The CPU heatsink is easy to remove.
Remove the screws around the CPU.
Use a plastic pry tool around the sink to carefully lift it.
It's like glue, so be gentle, wiggle, it will come off.

Remove the old now totally dry compound.
Rubbing alcohol works best, but even a window cleaner or heck, dry tissues will work.
I just use tissues, they don't break as easily, and can be thrown away.

You want to remove the FAN, because as I said above, the dust will be there.
Only now you can clean it.
Blew into the fins, then I used water (lol sue me), gently poured it into the sink.
Of course if you use water, wait a bit until everything dries.

- The GPU heatsink.
Remove screws, and you will have to pry each portion very carefully.
It's the same glue effect, but now on 10x the area.

ONLY touch the GPU itself!
The rest of the components on my machine had their compound in perfect shape.
So I didn't bother those. Why fix something that ain't broken?

So yeah, cleaned GPU, and put it back together.


- The machine will not boot until everything is in place.
So you can't just pop in the power button, and try the machine so you will not have to play the "take it apart, put it back" fun game.
Nah-uh, ASUS pays their engineers very well, they made it impossible to do that.

So connect everything. But you don't have to pop in the keyboard. Not like that helps a lot.

- Do what I told you in reverse order? Not much challenge. DVD just goes back in.
Make sure you connect stuff in reverse order, like you have to remove the DVD cage, so the USB thing on top-left can go back, yadda yadda.


Before you say "bro you are dissing ASUS"..
No, the build quality is trash.
Just like how Acer Predator, MSI gaming machines, and Alienware is.
They all have atrocious, crap build quality.

If these machines cost half their price, I would say that's justified.
But we have to pay a pretty dime for them.
So yeah, it's not ASUS only, it's the entire industry.
Even though these machines cost as much as a Dell Precision, manufacturers treat them like a facebook machine.

And ASUS, shame on you.
Back on the G75, you were able to remove the CPU/GPU cover on the back.
There WAS a cover.
But it's gone.

If you have enough money, and you can replace the machine in 2 years, don't.
It will overheat, break down one day, and you buy a shiny new one.
It's like cars.

I did it on my 2 years old machine, but honestly, I should have done it at year 1 already.
It had warranty, but meh, ASUS Warranty Service broke more parts on a laptop I brought in than what they fixed.
And even the fix broke after a few weeks. So yeah, warranty, totally useful.

Ask away!

Here are the pictures that should help a bit.

I tried to label them, name them, etc.