https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 16 Apr 2026 07:16:47 +0000 Sat, 15 Jul 2023 04:02:51 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=26144 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106586&title=670e-steel-legend-4090-wont-power#106586 Author: Xaltar
Subject: 26144
Posted: 15 Jul 2023 at 4:02am

Happy to hear you got it sorted out Enjoy the build ]]> Sat, 15 Jul 2023 04:02:51 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106586&title=670e-steel-legend-4090-wont-power#106586 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106583&title=670e-steel-legend-4090-wont-power#106583 Author: clok1966
Subject: 26144
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).]]> Sat, 15 Jul 2023 02:14:55 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106583&title=670e-steel-legend-4090-wont-power#106583 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106579&title=670e-steel-legend-4090-wont-power#106579 Author: Xaltar
Subject: 26144
Posted: 14 Jul 2023 at 8:55pm

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.]]> Fri, 14 Jul 2023 20:55:41 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106579&title=670e-steel-legend-4090-wont-power#106579 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106577&title=670e-steel-legend-4090-wont-power#106577 Author: Rabit
Subject: 26144
Posted: 14 Jul 2023 at 8:42am

Looks like dead short check with multimeter pins on adapter and later GPU. ]]> Fri, 14 Jul 2023 08:42:31 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106577&title=670e-steel-legend-4090-wont-power#106577 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106575&title=670e-steel-legend-4090-wont-power#106575 Author: clok1966
Subject: 26144
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.]]> Fri, 14 Jul 2023 08:26:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106575&title=670e-steel-legend-4090-wont-power#106575 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106563&title=670e-steel-legend-4090-wont-power#106563 Author: eccential
Subject: 26144
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.
]]> Thu, 13 Jul 2023 22:10:20 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106563&title=670e-steel-legend-4090-wont-power#106563 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106556&title=670e-steel-legend-4090-wont-power#106556 Author: Xaltar
Subject: 26144
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.]]> Thu, 13 Jul 2023 16:58:09 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106556&title=670e-steel-legend-4090-wont-power#106556 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106555&title=670e-steel-legend-4090-wont-power#106555 Author: clok1966
Subject: 26144
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)]]> Thu, 13 Jul 2023 05:46:59 +0000 https://forum.asrock.com/forum_posts.asp?TID=26144&PID=106555&title=670e-steel-legend-4090-wont-power#106555