650W enough for 7900XTX + i7 10700KF system?

[Princess Luna]

I've been out of the radar for quite a while so I wanted to do a sanity check here.

 

I'm putting together a brand new gaming focused PC which should run on stock (there shouldn't be a need to OC since 7900XTX at 3440x1440p res).

 

Specs are an i7 10700KF with a RX7900XTX, planning on using a Corsair TX650M (latest grey label) that I already got. The reference 7900XTX at stock should peak at 350w which leaves another 300w headroom for the rest of the system... should be fine right? Or is picking a higher wattage PSU really necessary here?

 

@GoldenLag@Stefan Payne@LukeSavenije@Jurrunio any of you old folk can give me your thoughts? Thank you so much!

[UnknownWalls]

No. I would advise 850

[Somerandomtechyboi]

Youll be fine as long as you undervolt the gpu, dont need to throw away perfectly good psus

 

When the need to overclock or swap for more power hungry hardware arrives then you may replace the psu

[PDifolco]

1 hour ago, Princess Luna said:

I've been out of the radar for quite a while so I wanted to do a sanity check here.

 

I'm putting together a brand new gaming focused PC which should run on stock (there shouldn't be a need to OC since 7900XTX at 3440x1440p res).

 

Specs are an i7 10700KF with a RX7900XTX, planning on using a Corsair TX650M (latest grey label) that I already got. The reference 7900XTX at stock should peak at 350w which leaves another 300w headroom for the rest of the system... should be fine right? Or is picking a higher wattage PSU really necessary here?

 

@GoldenLag@Stefan Payne@LukeSavenije@Jurrunio any of you old folk can give me your thoughts? Thank you so much!

Probably will work at stock settings, but OC 7900XTX can reach insane power draw of 500W+, while 10700K can draw 200 so no OC for you 

[Jurrunio]

It's borderline fine I suppose. If it's an Nvidia GPU I would say that's a bad idea because they didn't bother with voltage ripple suppression for the PSU but Navi 3X doesn't appear to have the same problem so far. 

[Princess Luna]

1 hour ago, Jurrunio said:

It's borderline fine I suppose. If it's an Nvidia GPU I would say that's a bad idea because they didn't bother with voltage ripple suppression for the PSU but Navi 3X doesn't appear to have the same problem so far. 

I'll force the card to its 350w reference tdp. Doesn't really bother sacrificing that lil bit performance when the cost is so high power wise any ways... specially when I'm only at 1440p ultrawide xd

[starsmine]

9 hours ago, Princess Luna said:

I've been out of the radar for quite a while so I wanted to do a sanity check here.

 

I'm putting together a brand new gaming focused PC which should run on stock (there shouldn't be a need to OC since 7900XTX at 3440x1440p res).

 

Specs are an i7 10700KF with a RX7900XTX, planning on using a Corsair TX650M (latest grey label) that I already got. The reference 7900XTX at stock should peak at 350w which leaves another 300w headroom for the rest of the system... should be fine right? Or is picking a higher wattage PSU really necessary here?

 

@GoldenLag@Stefan Payne@LukeSavenije@Jurrunio any of you old folk can give me your thoughts? Thank you so much!

7900xtx peaks closer to a bit over 400W. 
I would not buy a 650W to go with it, but I would also not feel the need to upgrade it if its what I have. Its a well built PSU that delivers 650W without actually being stressed about it. 

 

9 hours ago, UnknownWalls said:

No. I would advise 850

LOL why. Pull that out of your rear end did you?

[Jurrunio]

1 hour ago, Princess Luna said:

I'll force the card to its 350w reference tdp. Doesn't really bother sacrificing that lil bit performance when the cost is so high power wise any ways... specially when I'm only at 1440p ultrawide xd

The voltage ripple problem cannot be controlled by power limit unless you dial it way down, tho you probably wont get over 300w during normal use either.

 

Honestly undervolt is probably the best compromise you could do other than buying a new PSU

[starsmine]

22 minutes ago, Jurrunio said:

The voltage ripple problem cannot be controlled by power limit unless you dial it way down, tho you probably wont get over 300w during normal use either.

 

Honestly undervolt is probably the best compromise you could do other than buying a new PSU

am I missing something here?
Even at 700W provided that PSU is 40mv on 12v which, while not industry-leading, is more than good enough unless overlocked to the edge, which we are not doing here.

The actual parts used have zero say in ripple (so I am not sure I understand your Nvidia vs AMD comment either)

[Jurrunio]

29 minutes ago, starsmine said:

am I missing something here?
Even at 700W provided that PSU is 40mv on 12v which, while not industry-leading, is more than good enough unless overlocked to the edge, which we are not doing here.

The actual parts used have zero say in ripple (so I am not sure I understand your Nvidia vs AMD comment either)

Voltage transients is the proper name for it I think? Check the Nvidia 30 series tripping PSUs news from the past.

[starsmine]

3 minutes ago, Jurrunio said:

Voltage transients is the proper name for it I think? Check the Nvidia 30 series tripping PSUs news from the past.

Yes, if that is what you are referring to that makes sense. 40 series brought it under control for the most part, but yea poor PSU to run the top end 30 series cards on.

[UnknownWalls]

14 hours ago, starsmine said:

LOL why. Pull that out of your rear end did you?

Yes.