Aurora R11, PCI riser?

I think the risers are PCIe 3.0 rather than 4.0.

Using them, pending on the application and system, will cause issues since I am not aware of a bios setting that allows you to set the PCIe to 3.0 instead of 4.0 on systems that support 4.0.

Do you know the model of the Alienware you are using it on? R10, R11, R12?

There are no settings for riser cables.

X1 riser cables for mining wont be as fast as X16 cables.

But the quality or lack thereof can be seen.

The expensive ones work better IMHO.  They can be VERY long and still work fine.

NVIDIA has also stated that they wrote bios and drivers to prevent mining for gaming GPUs. Nvidia was pretty confident that its anti-mining algorithm is unhackable, which naturally put out an invitation for cryptominers to try to crack it. The chipmaker even affirmed that "End users cannot remove the hash limiter from the driver. 

https://www.youtube.com/watch?v=q5xvwPa3r7M

https://www.amazon.com/Thermaltake-AC-045-CN1OTN-C1-Premium-Extender-Graphic/dp/B06Y1SX7ZN

You can buy pcie 4.0 risers if you're plugging it into a pcie 4.0 slot.  

"NVIDIA has also stated that they wrote bios and drivers to prevent mining for gaming GPUs."

The ethereum mining lock only applies to the 3060, not 3090.  

As another aside, Nvidia already accidentally released a driver containing the code to unlock the 3060 last month anyway. They've since depublished the driver but opps.. 

That is also true, and now that I think about it it makes sense with the way Alienware limits the link speed.

If it was originally PCIe 4.0, it would link at 4.0 x 8

If you then use a PCIe 3.0 cable, it should link at 3.0 x 8

That will cut your actual link speed in half. That would explain why you might see a drop in hash performance.

So yes, for PCIe 4.0 systems you should use a PCIe 4.0 riser.

Hi, I have a question 

I just bought a PCIEe 4.0 riser cable ¿Would it works fine if I connect it in the second PCI slot of the motherboard I would like to connect a dual GPU 3090

It will work, but I believe the only PCIe 4.0 slot is the top slot, electrically wired at X8.

I think the bottom slot is PCIe 3.0 wired at X8.

You also might have a problem fitting that RTX 3090 in there, and SLI is a thing of the past.

@JoePKL @r72019 @Vanadiel @JorgeARL 

4 Way & 6 Way SLI is already depricated.

DUAL 3090 requires a HUGE Case and Power Supply  Both ATI and NVIDIA have officially abandoned Crossfire and SLI drivers and support.

Area 51 with 1500W power supply would be recommended but that too may not be enough power. 1000W seasonic PSU Linus Tested did not support DUAL 3090 cards that required 3 x 8 pin GPU power connectors for each card. Watch the Linus Tech tips video and see what happened when they tried to use 1000W psu!  Rofl. Linus ended up using corsair AX1600i power supply before it would work.

https://www.amazon.com/Corsair-AX1600i-Digital-Titanium-Modular/dp/B078X274ML

AX1600i PSU also REQUIRES 20 AMP Power Cord and socket where most power jacks in homes are 10 to 15 amps max.

NEMA 5-20 to IEC 320 C19

Many homes have 30 AMP 4 pole socket for electric dryer that can be converted to NEMA 5 20

NEMA 5 20 Jack to L14-30P plug

https://www.youtube.com/watch?v=i1dGQiNfCAc

@JoePKL @Vanadiel @JorgeARL @r72019 

Found another user  VeeTech using 3X 3090's with AX1600i PSU and custom motherboard with X1 to each 3090. Definitely Not a Dell.

https://www.youtube.com/watch?v=sEh5WYiyW74

Equipment Specs:
Motherboard: Biostar B250-BTC Core i7/i5/i3 LGA1151
CPU: Intel Celeron G3930 Kaby Lake Dual-Core 2.9 GHz LGA 1151
PSU: Corsair AX1600i Power Supply
RAM: 8GB DDR4 2400MHZ
GPU: 2 X EVGA RTX 3090 XC3 , 1X RTX 3090 FTW3 Ultra
SSD: Crucial MX500 500GB
Frame: Veddha Professional 8 GPU Mining Case

OMG some of the comments here are LOL!!

If you have 11th gen intel, then yes you can have PCIe 4.0.  But if its 10th gen intel, then you're stuck with PCIe 3.0

Being an R11, I assume you have a 10th gen Intel CPU.  

To be honest, you'd be better off just transplanting everything into a new case (with new motherboard and PSU)..

Thats what I did with my R12 - as it had the dreaded Gear 2 memory latency issue.  Now my RTX 3080 and the rest of the parts run much cooler, and faster!

@JoePKL 

PCI-e Riser is hardware. There are no drivers or settings.

Thermaltake-AC-045-CN1OTN-C1-Riser Cable