Pci-e Riser cable 4.0?

[Rkmoore]

So I beat my head against a wall a few days ago. I got a 3090 pny Epix X card and for the life of me I could not get it to work. I have 2 systems both almost the same spec. First is a x570 Asus TUF MB, 3950x, Evga 2080ti XC ultra hybrid, 64gb 3.2 Corsair Veg. Evga 1600 G2 and 2 samsung 980 1tb with 3 2tb GX2 Team group ssd's in a Evga DG-77 Case. The other system is a 3900xt in a ThermalTake P3. I called tech support, oh that helped. after about 6 hours i put my system back together and gave up, and got online .. no real help. Till i got on this forum and noticed the very first thread about X570 and pci-e riser cable issue with pci-e 4.0 cards .. and well my level of so called computer knowledge went right out the window. BTW the 2 AMD systems i have now are the first AMD systems i have had since my 486 dx2 66 days ... a very long time ago.  SOOOO anywho what cable would you recommend for the TT P3 case? Still want to vertical mount the card but do not want to leave any performance on the table while doing it.

 

[jaslion]

Does the card even work when plugged into a slot normally? I would start there first.

 

After that yes indeed pcie 4.0 riser cables are very very hit or miss right now so you may just wanna run a 3.0 one. Doesn't matter anyways the 3090 doesn't saturate a 3.0 x16 link.

[Rkmoore]

Yes sorry it works on the motherboard. Both systems had the vertical mount and it did not even dawn on me to try on the MB directly. Why im asking about a brand/kind of pci-e cable was hoping someone here had some luck already.

[SavageNeo]

4 minutes ago, Rkmoore said:

Yes sorry it works on the motherboard. Both systems had the vertical mount and it did not even dawn on me to try on the MB directly. Why im asking about a brand/kind of pci-e cable was hoping someone here had some luck already.

use pcie 3.0 cable. shouldnt be any difference between pcie 3.0  and 4.0 on rtx 3090

[Rkmoore]

Trust me the 2 cable's I have will not let this card work. 1 is Evga and the other is Thermaltake. will not let the card install a driver for more then 3 seconds before it fails and screen goes black and back on ... and repeats. thats what I was dealing with. Some time I would get a Error at boot about a compatible video card.

[FangerZero]

Did you ever get it working? I heard that using a 3.0 you have to install the GPU directly change the MoBo to 3.0 an then thing should be fine. I myself am debating a 3.0 vs 4.0 cable. 

[shaz2sxy]

the cost of a PCIE 4 cable at the moment are high

 

you can get around this by forcing the PICE bus from Auto in the bios to 3.

 

it wont have any real impact on your performance

 

I've done this on my NZXT H1, b550 motherboard with 3070