I have just built my first rig and when I try and press the power button, the power stays on for a second, then flickers off then on, and then turns off completely. This happens every time I try and turn it on. Is this a short, a connection loose, or something else???
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Power flickering then dead
- Thread starter Chmacle
- Start date
Solution
MauveCloud
Splendid
- May 7, 2010
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My first guess would be that your power supply is low quality and/or insufficient for your build. Specs please?
MauveCloud
Splendid
- May 7, 2010
- 2,830
- 0
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Yeah, that should be enough, and Seasonic is a good brand. The next thing to check is: did you connect all necessary power cables: the 24-pin ATX power connector, the 4 or 8 pin cpu power connector, and the pci-express power connectors?
I don't know what the pci is, but I have the main power connected the two ones to my hard drive and disc drive, my 8 pin to the CPU (but it goes into the mobo) and four molex into molex to 8 pin adapters (2 molex per adapter) that go into my GPU. When the power is on all fans in GPU, CPU, and case work
ko888
Titan
- Feb 18, 2009
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You should not be using the 4-pin Molex peripheral to PCI-E adapter cables.
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
ko888 :
You should not be using the 4-pin Molex peripheral to PCI-E adapter cables.
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
That's weird considering my GPU has two 8 pins on the top, not a 6 and a 8. Also, the adapters came with my GPU, which I thought would mean that I should use them
MauveCloud
Splendid
- May 7, 2010
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The molex adapters only came with the gpu in case you had an old power supply that didn't have pci-e connectors. You might need an adapter like this, though:
http://www.newegg.com/Product/Product.aspx?Item=N82E16812200420
http://www.newegg.com/Product/Product.aspx?Item=N82E16812200420
MauveCloud
Splendid
- May 7, 2010
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I think ko888 might be able to answer that better than I. I've never tried that. I'm surprised a psu with only one 6-pin and one 8-pin pci-e connector was recommended for that video card, unless it was a last-minute switch or you didn't fully specify which card you were getting - several sapphire 7970 models only need one 8-pin and one 6-pin, but they do make one 7970 GHz edition with 6GB vram that takes two 8-pin connectors.
ko888 :
You should not be using the 4-pin Molex peripheral to PCI-E adapter cables.
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
The power supply unit already has one 6-pin and one 8-pin PCI Express supplementary power connectors and you should only be using those. This is what the two PCI-E power connectors look like:
Can I plug the 6 pin into the 8 pin and be fine? My GPU has two 8 pins
ko888
Titan
- Feb 18, 2009
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Your other post never mentioned that your Sapphire Radeon HD 7970 was using a non-reference design circuit board. That's why it's so important to post the exact model number of any components, that you've mentioned, into your posts.
If I would have known that I would have recommended a different model power supply that actually has at least two (6+2)-pin PCI-E power connectors.
Since the cable that only has the 6-pin PCI-E power connector on it uses the same 18AWG wire thickness it is able to carry the same current load as the cable that has the (6+2)-pin PCI-E power connector. You can use the 6-pin to 8-pin PCI-E adapter cable that @MauveCloud provided a link to in one of the replies above.
If I would have known that I would have recommended a different model power supply that actually has at least two (6+2)-pin PCI-E power connectors.
Since the cable that only has the 6-pin PCI-E power connector on it uses the same 18AWG wire thickness it is able to carry the same current load as the cable that has the (6+2)-pin PCI-E power connector. You can use the 6-pin to 8-pin PCI-E adapter cable that @MauveCloud provided a link to in one of the replies above.
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