One of the problems associated with on-line advice is that you have no idea as to the knowledge and experience of the respondent. Many just plug a few key words into a google search and copy paste the response. After you have addressed the dead system issue, here's a bit about how we approach fan selection and control.
As to the fans .... Asus FanXpert is an excellent tool for controlling fans ... but like any capable tool, you can hurt yourself. A good way to start is with a quality product manufacturer and one which has excellent tech support. As great as the Asus BIOS and utilities are, tech support shows no signs of life. If you get a response, it's usually non-responsive to the question asked. So 1st thing to consider is a) what products offer the best performance and b) which products offer responsive support.
1.
Product Selection - I have spent a considerable amount of time investigating fan performance, determining fan needs and product selection. I created a spreadsheet based tool for radiator sizing that determines required radiator size for fan speeds from 1,000 to 2,200 rpm based upon testing done @ martinsliquidlab. Noctua is often given as the "best fan" choice and while they have excellent product selections, they don't prove out as top dog. If you take the Noctua fan off a Noctua cooler, and replace it with a Phanteks PH-F140SP, CPU temps drop by 6C at same rpm
https://www.overclockersclub.com/reviews/phenteks_f140/3.htmAnother go to source is listed below, see the table midway down that page ... their testing had those as the Top 5 for combination of low noise and performance:
Phanteks PH-F140HP/TS
Noctua NF-A14 FLX
Noctua NF-A15 PWM
Noiseblocker B12-2
Noctua NF-P14 FLX
http://www.silentpcreview.com/article1345-page7.htmlThat review is a bit old and the other fan I would consider equal to the Phanteks F140SP is the Silent Wings 3.
2.
Quantity - How many you need depends on your goals. I recommend one 120mm fan @ 1250 rpm for every 50-75 watts of component power at respective OCs (every 75 - 100 for 140mm @ 1250 rpm). Add 25 watts to those ranges for each 300 rpm increase. So add up MoBo and GFX cards and anything else that produces a significant amount of heat ( say CPU = 130 watts OC'd, GPU = 250 watts OC'd, Mobo = 40 watts, water pump = 20 watts) 440 watts in this case ... here I'd use at least 5-6 case fans. My total load is up near 800 watts ... I have 16 fans ... 10 in push pull on radiators, and 6 case fans ... I took half of them out 3 months ago while cleaning and haven'y put them back in. Temps are up only slightly, they really only are required for stress testing.
3.
Load - I just don't "get" the RGB thing. I have been using LED lighting building my own LED systems . I prefer single color lighting to highlight the build. I find all the flashie lightie, multi-color , breathing, alternating displays take the focus of the build quality and divert it to the light show. But that's an aesthetic choice for each individual. Your typical Fan header on Motherboards is rated for 1 amp. , some enthusiast boards may have 2 amp headers. The PH-F140Sps IIRC are 0.14 amps. Now when a fan (or any other motor starts up, there is something called inrush current. I can find no data on this subject for fans so I derate the allowable amperage based upon fan's speed.
1200 rpm = 0.84 allowable header load in amps
1500 rpm = 0.75
1800 rpm = 0.67
2100 rpm = 0.58
2400 rpm = 0.50
I'm sure it's overly conservative and I'm sure the headers have some ability to handle this inrush taken into account, but as it doesn't really impact quiet builds, I have continued to use it. So I limit the 1200 rpm fans to 6 per header or about 0.84 amps.
4.
Control - Next choice is how to control the fans: Choices are:
PWM - Long known for much better low speed control and having better ability to start at low speeds since voltage is always 12 volts. Downsides were low speed hum or clicking, gotten much rarer in recent years, and cost. On some brands, (i.e. Corsair), also susceptible to loss of speed control as you add more fans to a single channel (stay <5-6).
DCV - In times past was limited at low speeds as when control wanted say 350 rpm, it could slow down to that speed, but didn't have enough oomph to start at the lower voltage. Modern designs and MoBo control utilities have pretty much overcome this limitation.
PWM / DCV - This is a "best of both" worlds approach, works on both PWM and DVC MoBo Headers. Only limitation is when using a DCV header (getting rare these days) , you can not use an auxilliary power cable as the 12v power supply will override the variable voltage coming from MoBo header. So when using this , do NOT connect the power cable and limit the # of fans so as to stay below header rating.
5.
Sample Control Scenario - This is how we have set up our test box:
Channel 0 = CPU and CPU_OP MoBo Headers => Dual water pump (Swiftech 35x2)
Channel 1 = CHA_1 Header (0.84 Amps) => Phanteks Hub => (6) PH-SP140SP 1200 rm fans on 420mm radiator (now just 3 fans in push)
Channel 2 = CHA_2 Header (0.56 amps) => Phanteks Hub => (4) PH-SP140SP 1200 rm fans on 280mm radiator (now just 2 fans in push)
Channel 3 = CHA_3 Header => Phanteks Hub => (6) PH-SP140SP 1200 rm Case fansr (now just 3 fans, 2 in 1 / out)
- In stress testing, fan speeds top out at about 750 - 800 rpm (CPU core temps 69 - 78C, GPU @ 42C), in gaming 550 - 650 rpm (CPU core temps 53 - 64C, GPU @ 39C)
- All fans ramp up and ramp down to eliminate the control system chasing it's tail so to speak by eliminating fast response to temp changes so cutting fan speeds does not immediately result in temp increase and speeding up again. Rad fans ramp up over 30 seconds ... ramp down over 90 seconds to remove latent heat from thermal mass of coolant.
- Case fans are ramped 30 seconds up and down.
I would have tried to address your dead system issue but without a component list and what troubleshooting steps you have taken so far, not enough info to attempt.
Unfortunately, Asus Tech Support (email or phone) is less than non existent. Id almost rather no response than a response that answers a question different from what was asked. All of the systems we have here, those that have Asus MoBos, are eligible for "premium support" which allows for them shipping a replacement MoBo to you, and only then do you mail the old one back. Last time I did this, the replacement was warped like a banana and physically would not fit inside the case as the I/O panel missed the case opening by an inch. It took 3 months to get a working replacement and all email exchanges were thru Pegatron (AsRock's parent company).
Your best shot at assistance are enthusiast forums where knowledgeable users are present.
Note that Phanteks enthusiast cases have built in RGP controllers ... they also allow you to completely separate the fan speed from RGB and you can buy the RGB part separately.
http://phanteks.com/DRGB.htmlhttp://phanteks.com/RGB.htmlhttp://phanteks.com/PH-PWHUB_02.htmlhttp://phanteks.com/PH-PWHUB.html
October 26 Build
MoBo:Max VI Formula
RAM:16GB Mushkin DDR3-2400 10-12-12-28
GFX:2x Asus GTX780 DCII
HD: 2x Seagate 2TB Hybrid SSHD
SSD:2x Samsung 840 Pro 256GB
PSU:Seasonic X-1250
Case:Phanteks Enthoo Primo
OS:Win 7 Pro-64
Monitor:Asus VG248QE Black 23" 144 Hz
Optical:Asus BR Burner
KB: Logitech G19s
Mouse:RoG GX950
Fan Con.: Six Eyes
Cooling:420+280 Alphacool Rads, 35x2 Pump, EK CPU/ GPU Blocks, Acrylic Tubes w/ BP Fit