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Helpful ReplyHow to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme

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DC18V
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2020/12/28 16:59:36 (permalink)
Hello guys,
 
I'm new to the Forums. I hope you all had some great Xmas days! 
 
Since xmas I'm a proud owner of the EVGA RTX 3090 FTW3 Ultra. I also got a new motherboard and a new power supply.
Beside of flashing the motherboard's BIOS I didn't do anything yet.
 
(See specs below)
What's the best way to connect the 3090 with my power supply and motherboard, and how many cables should I use or avoid?

Available PCIe connections from PowerSupply
12V3 ; 12V4 ; 12V5 ; 12V6 ; 12V5/12V6
 
Motherboard: 
24pin ATX (the cable splits into 19pin + 8pin. The PSU has an 8pin connection called "MB")
6pin PCIe_x16 auxiliary power connector. Do I need this?
 
 
Hardware:
EVGA RTX 3090 FTW3 Ultra
Gigabyte x570 Aorus Xtreme
Be Quiet! Dark Power Pro 12 1500W
Tons of cables
 
Kind Regards, DC18V
post edited by DC18V - 2020/12/28 17:03:47
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    Sajin
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2020/12/28 19:18:23 (permalink)
    3 separate pci-e cables from the psu to gpu. One from 12v4, one from 12v5, and one from 12v6.



    Plug the 6-pin aux just to be safe as well.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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    DC18V
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2020/12/28 20:07:22 (permalink)
    Oké thank you!
     
    In case you got time to answer these questions:
     
    1) On your diagram, the 12V lanes are marked with a B, but the bigger one to the right is marked with an A. Does that mean anything?
    2) Where exactly do I plugin the PCIe cable for that 6pin ?
    3) Do you know if dedicated lanes (12v3 ; 12v4 ; etc.) are galvanically isolated, thus potentially able to avoid coil whine and other issues?
    post edited by DC18V - 2020/12/28 20:19:58

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    Sajin
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2020/12/28 21:25:48 (permalink) ☄ Helpfulby DC18V 2020/12/28 22:16:34
    1. You want them all on B. If your system shuts down under load you’ll need to put the psu in ock mode via the jumper.
    2. A on psu diagram. The aux power connector is hidden under a plastic piece on your board under the last pci-e slot. You’ll need to remove the plastic piece to access the aux power connector.
    3. No idea.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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    DC18V
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2020/12/31 23:28:22 (permalink)
    Happy new year!
    I just wanted to say that I finished building the system and it works pretty well. Cyberpunk 2077 doesn't crash. (only one time and that was when I tried to manually overclocked the 3090.)
    CPU temps are a bit high, but usually below 80*C and 50-60*C in idle. Max GPU temp: 75*C. (with the OC beta BIOS and 112% power limit.)

    Thanks again!
    post edited by DC18V - 2020/12/31 23:31:52
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    Hoggle
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2021/01/01 02:40:25 (permalink)
    Happy new year and glad to year it's up and running. Hopefully you are enjoying Cyberpunk 2077.

    Use an Associates Code & SAVE 5% - 10% on your purchase. Just click on the associates banner to save, or enter the associates code at checkout on your next purchase. If you choose to use my code I want to personally say "Thank You" for using it. 
     
     
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    Sajin
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    Re: How to connect cables? / EVGA RTX 3090 FTW3 Ultra / Gigabyte x570 Aorus Xtreme 2021/01/01 13:17:38 (permalink)
    👍


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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