power supply issue?

[m1ke101]

Okay, I just received a slk-900u off the fs/t forum, and I installed it earlier along with the 92mm tornado. I replaced my old cooling, which was a slk-800 with a smart fan 2. I also have 2 other smart fans in the case, and 3 clear led fans. I also have a 420 turbolink ps, and its been running fine @ the speeds in my sig with the slk-800. But just at first when I tried turning on my computer with the slk-900u and the tornado, (with all the fans turned up) the computer turned on for a couple seconds, then it just shut off. If I turn off all the fans, I can boot into the bios, but after that it shuts off too. Did my power supply just die on me? Or is there another possibility I'm overlooking?

 

[mechBgon]

First of all, I hope you had enough sense not to plug either the Smart Fan II or the 92mm Tornado into your mobo's headers

The most common cause of an auto-shutoff is that the heatsink is not making square contact with the CPU core, resulting in instant CPU overheat which triggers the auto-shutoff circuitry. The usual reason for the lack of square contact is that the heatsink is on backwards. I haven't worked with the SLK-900 but I'd imagine it's like other SocketA heatsinks and has a step cut into one end of its base, to provide clearance over the solid-plastic end of the CPU socket. If the heatsink's mounted 180 degrees backwards, the heatsink lands on the solid-plastic end of the CPU socket and is prevented from making square contact with the core. There is also a risk of core breakage in this situation.

Hope that helps

 

[m1ke101]

Originally posted by: mechBgon
First of all, I hope you had enough sense not to plug either the Smart Fan II or the 92mm Tornado into your mobo's headers The most common cause of an auto-shutoff is that the heatsink is not making square contact with the CPU core, resulting in instant CPU overheat which triggers the auto-shutoff circuitry. The usual reason for the lack of square contact is that the heatsink is on backwards. I haven't worked with the SLK-900 but I'd imagine it's like other SocketA heatsinks and has a step cut into one end of its base, to provide clearance over the solid-plastic end of the CPU socket. If the heatsink's mounted 180 degrees backwards, the heatsink lands on the solid-plastic end of the CPU socket and is prevented from making square contact with the core. There is also a risk of core breakage in this situation. Hope that helps

Course its not plugged into the motherboard I'm using a 4 pin adapter. The slk-900u is the bolt on version, so maybe I put it on incorrectly. I'll look into that.

 

[m1ke101]

Alright I just tried 2 other power supplies with the motherboard, a 300w enlight and a 300w sparkle. Keep in mind I only have the ps connected to the motherboard, so none of the drives or the fans are powered. Its also at stock settings, stock speed and stock voltage. The computer will power on, and once I press delete to enter the bios, it'll delay for a little while and the computer will shut off.

 

[Technik]

Hmm very strange...

I'd try the previously mentioned possibility. I am interested because I have a Turbolink 420Watt PS (it came with my cheiftec case)

It sure does sound like the overheating protection circuit to me too, though you never know.. maybe something happend to the umm.. hmm, I'm not sure on that one, could be a serious problem in the motherboard maybe.

 

[mechBgon]

And the heatsink's on correctly then, I assume. And you say this all worked fine until the SLK-900U was installed? I wonder if the board is wanting to see an RPM signal on the CPUFAN header. What brand/model of motherboard is this? Is it the 8RDA in your sig?

 

[m1ke101]

Okay I took out all my pci devices, and it started booting into windows, but while loading it just shut off. I've tried 3 different power supplies, and they all seem to just shut off, so I'm thinking it might not be the power supply. So basically, the only things plugged in are the video card, ram, cpu, and the motherboard. I don't think its the video, cpu, or ram, because I don't see how they would affect it. I'm thinking about RMAing the motherboard and the power supply.

 

[mechBgon]

Just out of curiosity, what happens if you replace the 92mm Tornado with one of your lower-powered LED fans (the idea being, maybe your PSU is running out of 12V amperage for all that 12V equipment)? The Smart Fan II's alone draw 8.4 watts each, for instance. :Q

 

[m1ke101]

Originally posted by: mechBgon
Just out of curiosity, what happens if you replace the 92mm Tornado with one of your lower-powered LED fans (the idea being, maybe your PSU is running out of 12V amperage for all that 12V equipment)? The Smart Fan II's alone draw 8.4 watts each, for instance. :Q

The thing is, I currently don't have any of the fans or my drives plugged in except for the hard drive. And its still reseting with all 3 power supplies.

 

[mechBgon]

Originally posted by: m1ke101

Originally posted by: mechBgon
Just out of curiosity, what happens if you replace the 92mm Tornado with one of your lower-powered LED fans (the idea being, maybe your PSU is running out of 12V amperage for all that 12V equipment)? The Smart Fan II's alone draw 8.4 watts each, for instance. :Q

The thing is, I currently don't have any of the fans or my drives plugged in except for the hard drive. And its still reseting with all 3 power supplies.

Oh, gotcha Hmm... yeah, I'd be thinking RMA too.