Yeah that would bug me, is it obnoxiously loud even when they are in the case?
Makes me wonder if any fan manufacturers could make those fans that Apple made for the new MBP...
Err... what? The fans are very quiet. If I didn't have a nasty whining noise from the pump I could almost forget the PC is on entirely.
What does unsynchronised fans do that regular even fans do not? Off the top of my head, I'd say it causes an uneven noiselevel being more pleasant to the ear.
The problem with that, I should think, is that it'd only work with radial fans, which themselves are already loud, and not really something one would want in their computer build.
I'm looking forward to Noctua's active noise cancellation fan technique.
It is extremely silly, but it works.
---------- Post added 2012-08-09 at 10:02 PM ----------
Forgive me for not knowing the scientific terms. ;p
Having every other blade differently angled? It would reduce airflow potential and change the static pressure in an undesirable (inconsistent) way. Without reducing noise levels.
Either way, this is post your gaming setup-thread, and not Jeopardy! Special Fan edition. Let's move this venue to the chat thread?
For video cards, you could use MSI Afterburner's fan controller to keep those fans around 20% until the GPU core hits 50C or so. I used the curve below.
This is also why I continue to suggest Asus motherboards regardless of how much cheaper ASRock's options are. Asus's Fan XPert 2 utility is better than most external fan controllers for the vast majority of users. It's better than just about anything other than an mCubed BigNG T-Balancer.
Last edited by kidsafe; 2012-08-10 at 03:47 PM.
And this review does actually go ahead and strip away the fancy buttons to see what's actually underneath.
The rectangular chip is the brains of the operation, unfortunately it has absolutely no markings, so I have no idea what sort of brain it is. The control setup is quite interesting in that it is neither straight PWM nor a buck controller type voltage regulator (note the lack of inductors; no inductor, no buck regulator). In the interest of figuring out what method it does use I hooked my oscilloscope up to the output with a fan hooked up as a load, the following picture is a graph of the voltage delivered to the fan, each line vertically is two volts and each line horizontally is 10 milliseconds.
For starters we see that this is pulsing the voltage at a very low frequency, around 14 Hz or so. Beyond that it looks like the control chip feeds some voltage to a transistor that fills a capacitor and that capacitor in turn feeds voltage and current to a second transistor that controls the fan itself, as the capacitor drains out the second transistor lets less current/voltage through and the fan doesn’t get as much. It’s a rather interesting method and much cheaper to design and build than a buck regulator, while still capable of delivering the full 12 V when set to full, unlike a linear regulator setup.
The only real issue with this setup is that some fans will make a noise every time the voltage pulses. When set to full speed the controller doesn’t pulse the output voltage, so of course the noise goes away entirely. Both medium and low speeds require the voltage to be pulsed and hence can cause fans to make noise. Of the included fans only the rear fan makes noise; the top fan, the front fan and the two lower HDD bay fans make no noise on medium or low speed settings beyond airflow noise.
Other than that noise from the rear fans, all the fans are very quiet on low, and still quite quiet on medium. On high they ramp up and make more noise, but nothing offensive and no mechanical noises. Unfortunately one of the two SMD chips that are paired up for each channel is marked only with A79T, which I cannot find any data on at all. The other chip’s markings decode to a fairly standard NPN transistor with 0.2 A maximum capacity. Because I don’t know what the other chip is exactly, the above description of the fan controller is my best guess, rather than known fact.
The fan controller is rated for a maximum of one Amp per channel, not one Amp per connector! Each channel has at least two connectors, and one of them has three connectors. Be sure to add up the power draw of the fans on each channel to avoid letting the magic smoke out of one or more parts of the fan controller; unlike the controller that comes with the Cooler Master Silent Pro Hybrid 1300w PSU there does not appear to be any over-current-protection on this controller.
So here is my update on my rig with better pics! Also added my home server and peripherals.
Here some pics:
Now with quad channel RAM and I love my Sapphire GPU! :P
As you may notice Day9 isn't a fan of my mess! *g*
Case: Fractal Design Define XL Black Pearl
Power Supply: Enermax Platimax 850W
Motherboard: Asus P9X79 PRO
RAM: CORSAIR Vengeance 32 GB DDR3-RAM @ 1600 MHz CL9
CPU: Intel Core i7-3930K @ 4.2 GHz
GPU: Sapphire Radeon HD 7970 Dual-X OC-Edition 3GB GDDR5 running Bios 2
HDD: 1 TB Seagate Barracuda, 320 GB WD Scorpio Black
SSD: 128 GB Samsung 830
Cooling: Corsair H80 with 2 NOCTUA NF-P14 FLX in push-pull config
Case Fans: NOCTUA NF-P14 FLX (have to change the fan in the bottom front to a NOCTUA NF-P14 FLX)
Fan Controller: NZXT SENTRY 2
Need to upgrade my peripherals.
My old rig = Homeserver: AMD Phenom II X4 965 @ 3,6 GHz CPU – Gigabyte GA-880GMA-UD2H Mainboard Socket AMD AM3 DDR3 Memory Micro ATX – [ATI Radeon HD5750 Graphics Card] not used – Kingston 4GB Value Ram @ 1333 MHz CL9 RAM – one 320 GB WD Scorpio Black HDD
Peripherals: LOGITECH Cordless Desktop MK250 Keyboard – Logitech G500 Mouse – Roccat Kave Gaming Headset – Rode NT1-A Studiomicrophone – PreSonus Audiobox USB Recording Interface – one Xbox 360 PC Controller- one TFT 22″ LG Flatron E2240T White-LED Backlight and one TFT 23″ LG Flatron E2351 – one Western Digital 1,5 TB 7200 RPM external HDD
Last edited by kidsafe; 2012-08-10 at 05:07 PM.
I will Post pics after I get it all set up and running. But here are my specs.
Corsair Vengence 8gb ram
Cooler Master 212 evo
Crucial M4 64gb ssd
Gigabyte Windforce 7950 3gb gpu
Ocz Mod Xtreme Pro 600 psu
Cooler Master HAF 912
Samsung 23.6 inch 1080p monitor
Scored all that with windows 7 for $1198 today. And I have $75 in rebates I may or may not use.
Pics coming soon.