0
votes
0answers
81 views

CPU, GPU fans spinning at full speed after shutdown

My computer has been running fine for 4 years, but yesterday it starts to exhibit odd behavior: After I shut down the computer, the CPU and GPU fans start spinning at full speed (everything else ...
1
vote
2answers
64 views

Connecting mother board, power supply, and tower

I am working on putting together a desktop for the first time and and ran into a problem, I am not sure how to connect the fans that came in my tower, my power supply, and connect them all to the ...
1
vote
2answers
54 views

Repair/Replace the Graphic Card's fan

Yesterday, I was cleaning my PC and after that, I tried to boot my pc and itself automatically after sometime. I checked all the fans and notice that my Nvidia GeForce 8400 GS Graphic card fan is ...
0
votes
0answers
29 views

how do I know whether a fan error on post requires action?

I have an HP a6400f PC, (it's a tower) and after a brief power blackout, I started getting a generic "Fan error" problem upon startup. I can click through the error and boot into Ubuntu. ...
1
vote
2answers
92 views

Need assistance in connecting my PSU fan cable

I noticed that my PSU got really hot during gaming (to the point where it shut down my computer). I searched my PSU's model name (AXP-630P12P) and it said that the fan on the PSU was supposed to start ...
0
votes
0answers
213 views

How much power can a 3/4 pin fan connector handle?

I was thinking of buy 5 very high power 120mm fans. These ones to be sepcific. Delta PFB1212UHE. These fans require a lot of power. They are 4 amp, 48 watts. They sell them with the 3 pin ...
-2
votes
2answers
115 views

Planning out an NES PC build (on the cheap) [closed]

I'm in the process of building a PC inside an NES case. I'm trying to get as much power out of it without breaking the bank. Rigging up the power switch and reset has been well documented, so this ...
2
votes
1answer
57 views

Computer is OFF, and fans turn on and off twice a day

We have an OptiPlex 755 desktop acting quite strangely here. It's powered off, not in standby or hibernate, and from time to time it will just start spinning its fans for a few seconds, and then turn ...
0
votes
1answer
15 views

power supply without original fan

Original fan (120 mm) rotates fast and makes quite a big noise I replace original fan with 140 mm fan which makes little noise. Original fan was located ~ 5 mm from other parts of power supply. The ...
0
votes
1answer
988 views

CPU fan turns on for a second and stops, PC does not start at all

I have checked my PSU and it works fine. When I turn on the MOBO, the CPU fan, case fans and the psu fan itself turn on for half a second and then turn off. The PC remains off. The Bios light turns ...
1
vote
3answers
407 views

How do PC fans know how fast to spin?

Building my first PC tomorrow, and one thing is confusing me. How do the fans know how fast to spin? The CPU fan is connected to the motherboard's 4pin cpu_fan socket, so I can understand how it can ...
0
votes
1answer
38 views

Dozens of spontaneous reboots

I am working on a SUSE Linux based system that runs 24/7 and has done so for around 3 years although I cannot say that it has not been rebooted in that time. At 9th June there apparently was some sort ...
1
vote
0answers
175 views

CPU fan failing to start on boot sometimes

I have a fairly old desktop, which I like to use a fair bit over my newer PC's however sometimes on boot, the CPU fan fails to start. I had this problem previously, and I simply bought a new fan. I ...
1
vote
2answers
3k views

Did I fry my motherboard or my power supply?

I just installed a second video card (GeForce 7900 series) alongside my older GeForce 6700 Series. After the computer was powered on for about a day, I came back to find the unit dead, with the power ...
1
vote
2answers
138 views

600W vs 1200W PSU in terms of noise? [closed]

I've been wondering, if my system draws about 400W at peak, which PSU would be quieter? assuming both are from the same manufacturer using the same type of fan and cooling mechanism? My theory was the ...
1
vote
3answers
3k views

PSU failing or Mainboard failing?

I am having some troubles lately powering on my desktop workstation. While starting up the PC after being off for hours (usually at least 8 hours) it randomly fails to do so. What happens is that : ...
2
votes
1answer
465 views

Antec 900 fan plugs are not compatible with PSU or motherboard

I have an Antec 900 case, which has two small fans in the front, a large fan on top, and an exhaust fan in the back, all of which have individual power cords/plugs. They look identical to the piece on ...
0
votes
2answers
499 views

Does a chassis fan DC12V 0.18a have higher RPM than one with DC12V 0.16a?

I am going to purchase a few chassis fans (12cm) for my computer and the salesperson told me that a fan with DC12V 0.18a has higher RPM than one with DC12v 0.16a. I don't know anything about ...
1
vote
1answer
178 views

PC won't power on due to graphics card loop

One day when I decided to turn on my PC, something strange happened. All the fans were running, but I had a blank screen. I then heard my graphics card's (ATi 5770) fan go in to a loop, turning on for ...
1
vote
2answers
292 views

Power supply does not silent after few seconds

I have a desktop computer that I intend to use as a Linux server. I assembled all components and the computer properly boots in Ubuntu, and works fine, however, the power supply fan does not turn down ...
0
votes
2answers
228 views

Safety of opening a PSU

In a question posted recently here on SU the answer came up saying to "Never open a power supply, it has no user servicable parts". Mine has a cable barely touching the PSU fan (I recon) and I ...
1
vote
1answer
168 views

Can I hook another fan to already used molex

I have got 650 watt power supply unit. It has a lot of SATA cables. There is two cables, both splits to 4 molex connectors. Two molexes are used for my two optical drives. 3rd one is used for ATI ...
15
votes
4answers
1k views

Buying A Computer “Case” Fan… Does It Always Run At 100% Unless Told Otherwise?

What happens if I do not plug it into the motherboard and it does not have a switch? I have seen fans before with an "off/low/high" switch that allows you to manually set their speed. I have seen ...
1
vote
2answers
456 views

PC doesn't turn on

I've got a weird problem. When I try to turn on the computer it makes a weird sound. It sounds like all the fans are getting pulses and turning on-off each second. The on-board light doesn't seem to ...
2
votes
1answer
168 views

Power only Fans from Power Supply Unit

I have a PSU that I want to use to power two 120mm 12v fans. This power supply is not connected to a mother board. The fans came with an adapter to plug them into Molex cables. I have connected the ...
2
votes
1answer
868 views

Installing a case fan: What to do when there's no spare 3-pin and no Molexes at all?

My fan came with a 3-pin connector and a little extension cord to piggyback on a Molex if necessary. It seems that the only kind of power connector my PSU has is the ATX 1.3 (i.e. SATA), and there's ...
0
votes
2answers
1k views

Lenovo R61 keeps shutting off spontaneously

I have a Lenovo R61 that was working fine except that the fan has been rattling lately. I came back to it after a normal day and it was off. It would not power on at all. The indicator light for the ...
4
votes
2answers
12k views

How many watts do case fans generally use?

I'm deciding between a 500 watt PSU and a 600 watt PSU. I currently have a 460 watt PSU that powers everything but my dvd drive, spare hard drive, and 2 fans. I've determined 40 watts is enough to ...
1
vote
2answers
5k views

Fans and power lights don't turn off in standby

My desktop computer (Zotac 8200 motherboard) has a problem when I put it into standby mode. I use Windows 7 to put it into standby. The cpu fan, system fan, and PSU fan don't turn off. Nor does the ...
0
votes
4answers
1k views

120 mm fan connected directly to power supply?

Has anyone tried this before? When i bought my 120mm fan, it came with a power adapter to connect directly to a plug that powers IDE drives. So i installed my fan using the adapter to power it and ...
5
votes
3answers
12k views

Does the fan go on the bottom or top of the power supply?

Which direction should I install the corsair tx 750 psu? Should the fan go on the bottom or top? It seems the fan should be on the bottom of the case correct? Update I have a antec P183 case, so ...
5
votes
5answers
6k views

Could I replace a stock PSU fan with a more quiet one?

I have a cheap 450W PSU with an exhaust fan at the rear. This fan, however, is very loud. Is it a good idea to replace the stock PSU fan with a quiet fan with similar airflow? The PSU fan is ...