Question GPU upgrade

[giqoheqi]

currently have an asus rog 2080ti and have just bought the MSI suprim X 3090 and am wondering if I can still just take old one out and replace with new one because they're both nvidia cards or if I need to do anything extra as they're from different manufacturers. Also noted on the MSI card it says it requires an 850w PSU which I have already but does that mean it will be ok for whole PC or do I need more wattage, say a 1000w psu?

 

[cdrkf]

currently have an asus rog 2080ti and have just bought the MSI suprim X 3090 and am wondering if I can still just take old one out and replace with new one because they're both nvidia cards or if I need to do anything extra as they're from different manufacturers. Also noted on the MSI card it says it requires an 850w PSU which I have already but does that mean it will be ok for whole PC or do I need more wattage, say a 1000w psu?

You should just be able to swap them - the drivers come direct from nVidia and aren't manufacturer specific so Asus, MSI won't make a difference driver wise. It is probably worth installing the latest driver package from nVidia once you've changed the card (windows 10 has a bad habbit of auto installing out of date drivers whenever you change anything). If you did run into any problems you can also do a full clean driver install by using the free Display Driver Uninstaller tool or 'DDU' to remove all older nVidia drivers from the machine and then do a fresh install - that said in this case I don't think that will be needed as the two cards both run on up to date drivers.

With regard to recommended PSU - the stated values are for the whole system. The RTX 3090 doesn't use anywhere near 850W of power (I think it peaks around 300) but the extra headroom is to make sure it's fully stable with everything else in the system (It's also typically not a good idea to run a PSU maxed out - so a fast cpu + RTX 3090 will likely use around 600W - running that on an 850W unit means load is around 70% which is a good level for PSU efficiency and lifespan). I think you will be fine with your current unit, assuming it's a decent quality PSU (which I'm assuming it will be given the GPU's you are running).