Question 850watt psu enough for a 3090Ti ?

Probably not.

3000 series cards can have power demand spikes much higher than the nominal requirements.
What is the make/model of the 850w psu?
The ability of a psu to handle such spikes will be determined by the quality of the unit.
Gold rating is not a quality indicator.
If you have the psu, go ahead and try it.
Be alert to any strange behavior.

If you are buying, look for a stronger psu with a 7 year warranty or better.
 
Probably not.

3000 series cards can have power demand spikes much higher than the nominal requirements.
What is the make/model of the 850w psu?
The ability of a psu to handle such spikes will be determined by the quality of the unit.
Gold rating is not a quality indicator.
If you have the psu, go ahead and try it.
Be alert to any strange behavior.

If you are buying, look for a stronger psu with a 7 year warranty or better.
EVGA Supernova 850 G+ 80 plus Gold
 
You have spent a bundle to buy the 3090Ti. Why not spend another $50 - $75 and get yourself something that won't ruin it??

Get a decent 1000 W (or even a bit higher) just to be on the safe side and be future-proof.
 
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You have spent a bundle to buy the 3090Ti. Why not spend another $50 - $75 and get yourself something that won't ruin it??

Get a decent 1000 W (or even a bit higher) just to be on the safe side and be future-proof.
True enough, but it appears that the OP already has a quality 850w unit and wants to know if it will work.

My thought is that it will not hurt to try and see.
 
You have spent a bundle to buy the 3090Ti. Why not spend another $50 - $75 and get yourself something that won't ruin it??

Get a decent 1000 W (or even a bit higher) just to be on the safe side and be future-proof.
I bought the psu over a year ago. Its still new in the package. Have been waiting for pc parts to be available and gpu's.
 
If you don’t oc or increase ppt sure thing sure it will work. Why don’t you just try it, save the headache. If it doesn’t work it will just crash or simply limit the performance. But keep in mind it’s a lot better to have more! I even use 850w on 6800xt, though 750w is enough
 
Probably not.

3000 series cards can have power demand spikes much higher than the nominal requirements.
What is the make/model of the 850w psu?
The ability of a psu to handle such spikes will be determined by the quality of the unit.
Gold rating is not a quality indicator.
If you have the psu, go ahead and try it.
Be alert to any strange behavior.

If you are buying, look for a stronger psu with a 7 year warranty or better.
850w is light for a 3090ti , due to the transient power spikes.
It depends on the quality of the psu and the rest of the system. Gold is not a measure of quality and the choice of cpu can make >100w difference to the system power requirements.
It has a ACRF topology on the primary. Not sufficient for a 3090Ti. You want nothing but a Tier A unit. They all have LLC on the primary that can handle the spikes of a high-end videocard very well which a ACRF unit can't.
You have spent a bundle to buy the 3090Ti. Why not spend another $50 - $75 and get yourself something that won't ruin it??

Get a decent 1000 W (or even a bit higher) just to be on the safe side and be future-proof.
Which psu would you recommend? Do I want multi rail or single rail +12v? Should I go 1000 watt or 1200 or 1600?
Are the P+, P3 and T2 from EVGA any good? How about the Corsair HX series?
 
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