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670E Steel Legend- 4090 wont power
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Xaltar View Drop Down
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    Posted: 15 Jul 2023 at 4:02am
Happy to hear you got it sorted out Enjoy the build
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clok1966 View Drop Down
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Points: 65 		Post Options Post Options   Thanks (1) Thanks(1)   Quote clok1966 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 2023 at 2:14am
thanks for suggestions, I have resolved it. was a 3rd party 90 degree 4090 connector.
SYBECHATF RTX 4090 4080 4070TI 3090TI 16Pin(12+4) to 4x8Pin Cable with 90 Degree 12VHPWR Connector,for Corsair

Used the included STIFF connector and it all works. I should have done that right away, poor troubleshooting by me. But it was a new build and I did not want to use that horrible ugly one (pride).
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Points: 27473 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2023 at 8:55pm
Originally posted by clok1966 clok1966 wrote:

yes it's the GPU, The PSU had 4 8 pins just for Vidio cards (PCI) it has 4 8 pins from PSU to the adaptor that plugs into card. What stumps me is. the card is plugged in with no Power connected the PC boots and the onboard video works fine. shut it down and connect power to video card and it won't fire up at all ( no fans nothing but the LEDS on the MB lite.


Make sure your GPU power cables are the correct ones, 6+2 not 4+4. 4+4 is CPU power
and has a completely different pinout. If you are connecting one of these it will
no allow the system to power up.
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Looks like dead short check with multimeter pins on adapter and later GPU.
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Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote clok1966 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jul 2023 at 8:26am
yes it's the GPU, The PSU had 4 8 pins just for Vidio cards (PCI) it has 4 8 pins from PSU to the adaptor that plugs into card. What stumps me is. the card is plugged in with no Power connected the PC boots and the onboard video works fine. shut it down and connect power to video card and it won't fire up at all ( no fans nothing but the LEDS on the MB lite.
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Points: 6530 		Post Options Post Options   Thanks (0) Thanks(0)   Quote eccential Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jul 2023 at 10:10pm
I'm pretty sure that clok1966 is talking about the GPU power connector, not motherboard. I'm assuming that giant RTX 4090 is using the new 12+4 pin power connector, and you're using an adapter that takes four separate 8-pin connectors from the power supply.

The new 12+4 pin connector has a bad reputation. Make sure it's REALLY REALLY IN THERE.

If you have another GPU, maybe try that, if only to eliminate motherboard/CPU as culprit.
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Points: 27473 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jul 2023 at 4:58pm
Which 4 connectors do you have connected? The 4+4 pin connectors for CPU power?
You only need one of the 8pin power connectors populated. The second is optional
and is only really needed for more extreme setups with large overclocks etc.
We had someone on the forums report that their system wouldn't power on with both
8pins populated so give it a shot with just 1.
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Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote clok1966 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jul 2023 at 5:46am
just put my system together with all new parts, and it all works and boots, video with onboard till I put my 4090 in. Recommended Coursair HX1200 PSU, all 4 Connectors connected. I plug it in and hook power to Card and then it won't power on (still led's on board but no troubleshoot lights, the board is not starting, no fans) I unplug power with the card in, powers right up. Double-checked power connections. it's a NEW Zotech Amp Extreme. Something in BIOS I am missing?, been a long time since I built a system from scratch. did clear bios and it's updated to the current one from the Asrock website. since everything works till I put a 4090 card in I am leaning towards a bad card maybe, Just had a 3090 fail on my old rig, can I get this unlucky? (machine is on a UPS so its not some odd power issue)
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