I thought let's buy a new card!

So I have one running mining rig with 3 x PNY 1660 supers in it. No problems there everyting is running on 30.5 MH/sec with a powerdraw of 217 Watts out of the wall (~75 a card). Using Phoenix miner under the latest HiveOS.

I recently (last week) bought a brand new EVGA 1660 super Ultra SC and plugged it into my system. I used the default settings (no OC, no power limiting) and expected a hashrate around 25 MH using Phoenix miner. It only hit 20 MH. Overclocked on +950 and power limited it does 23.7.

So to eliminate as much options as possible I did the following:

- I removed all cards and risers and booted it as the only card in the first x16 slot on the board: exact same results
- I used xubuntu 20.04 with the 450 nvidia drivers with again only this card in the first x16 slot: exact same results
- I used Windows 10 64 bits with the 460 nvidia drivers and msi afterburner: exact same results
- All was repeated on a different motherboard

I checked all the info in GPU-Z and the control panel and it is all similar to my PNY cards.

OS: HiveOS / Xubuntu 20.04 / Windows 10
Drivers: Nvidia 450 and 460
Phoenix miner version: 5.4C (linux and windows)
Card: EVGA Geforce GTX 1660 Super SC Ultra (brand new)
Board 1: MSI G41M P33
Board 2: MSI B630-A PRO

As I only found results comparable to my PNY cards searching on this EVGA card, I'm quite lost and baffled. I haven't seen anyone else with this problem. The card seems to be performing like a regular 1660.

If any additional info is needed, I will gladly put it here.

Any thoughts and advice greatly appreciated, thanks in advance for your help!