I run a 1300w Seasonic Prime Gold with my 3080 FTW3 Hybrid.  Works good.  I see peaks of 475w, maybe transients that are higher, the bigger high performance PSU's are very effective in dealing with those.
 
As far as price/performance/availability goes, look into the 850w Super Flower Leadex III gold, or the 1000W Platinum, which is actually in stock:
 
https://www.newegg.com/super-flower-leadex-platinum-se-sf-1000f14mp-v2-1000w/p/1HU-024C-00020
 
^ Buy this NOW.
 
https://www.newegg.com/p/...300%204841%20600479297

undecided65
I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.

Whew lad.

undecided65

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.
My Kill-a-watt showed total consumption of under 500W with 3 SSDs, 1 NVME, a Ryzen 3800x and a 3090 FE while gaming.

 
An FE is NOT, I repeat NOT a 3080 FTW3.
 
And Kill Watts aren't accurate, not even really close to being accurate.
 
 
 
 

jankerson

undecided65

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.
My Kill-a-watt showed total consumption of under 500W with 3 SSDs, 1 NVME, a Ryzen 3800x and a 3090 FE while gaming.

 
An FE is NOT, I repeat NOT a 3080 FTW3.
 
And Kill Watts aren't accurate, not even really close to being accurate.
 
 
 
 

Also used the RM1000i internal reporting which matched the kill-a-watt so it must be close enough.

undecided65

jankerson

undecided65

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.
My Kill-a-watt showed total consumption of under 500W with 3 SSDs, 1 NVME, a Ryzen 3800x and a 3090 FE while gaming.

 
An FE is NOT, I repeat NOT a 3080 FTW3.
 
And Kill Watts aren't accurate, not even really close to being accurate.
 
 
 
 

Also used the RM1000i internal reporting which matched the kill-a-watt so it must be close enough.

 
From the wall means NOTHING.

jankerson

undecided65

jankerson

undecided65

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.
My Kill-a-watt showed total consumption of under 500W with 3 SSDs, 1 NVME, a Ryzen 3800x and a 3090 FE while gaming.

 
An FE is NOT, I repeat NOT a 3080 FTW3.
 
And Kill Watts aren't accurate, not even really close to being accurate.
 
 
 
 

Also used the RM1000i internal reporting which matched the kill-a-watt so it must be close enough.

 
From the wall means NOTHING.

No, I mean the RM1000i comes with a usb cable that connects to a motherboard USB header and it reports all its data. The include the input wattage from the wall as well as output voltages and watts.
Also, the 3090 FE maxes out at around 390W according to the nvidia hud.
 

undecided65

jankerson

undecided65

jankerson

undecided65

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

I ran a 3090 with a Corsair RM750x so with a 3080 you should be fine with even less.
My Kill-a-watt showed total consumption of under 500W with 3 SSDs, 1 NVME, a Ryzen 3800x and a 3090 FE while gaming.

 
An FE is NOT, I repeat NOT a 3080 FTW3.
 
And Kill Watts aren't accurate, not even really close to being accurate.
 
 
 
 

Also used the RM1000i internal reporting which matched the kill-a-watt so it must be close enough.

 
From the wall means NOTHING.

No, I mean the RM1000i comes with a usb cable that connects to a motherboard USB header and it reports all its data. The include the input wattage from the wall as well as output voltages and watts.
Also, the 3090 FE maxes out at around 390W according to the nvidia hud.
 

 
That IS NOT A 3080 FTW3 ULTRA. 
 
They pull every bit of 450W+.
 
I have seen mine pull as much as 525W, measured from my AXI 1600.
 
And that's not including the 900W+ transient power spikes.

So after more reading I feel like I need to have a PSU on standby...

As stated I have the SeaSonic Focus PX750 now. I’m looking at another SeaSonic strictly because of their rep and the fact I already have braided cables in my system that I can use.

However I am looking at Corsairs AX850 Titanium (in stock) or an RMx 850 or 1000. I will admit, I impulsively ordered a SeaSonic PRIME TX850 yesterday but then just today started reading and was routed to some posts that the PRIME was mishandling certain issues worse than the FOCUS line?? Even JonnyGuru himself was discussing. It all seems so hit or miss.. looking for advice! Again, if I go with another PSU manufacturer I’m going to be ordering new cables as well so that’s added $$

undecided65
If you are gonna spend the $$$$ go for a 1000W. It will last you into the next gen of cards :)

Just unsure which brand to go with! FOCUS PX1000 would be my choice but OOS everywhere

It's the miners, they are buying anything 1000W+

kevinc313

sstevens5
So after more reading I feel like I need to have a PSU on standby...

As stated I have the SeaSonic Focus PX750 now. I’m looking at another SeaSonic strictly because of their rep and the fact I already have braided cables in my system that I can use.

However I am looking at Corsairs AX850 Titanium (in stock) or an RMx 850 or 1000. I will admit, I impulsively ordered a SeaSonic PRIME TX850 yesterday but then just today started reading and was routed to some posts that the PRIME was mishandling certain issues worse than the FOCUS line?? Even JonnyGuru himself was discussing. It all seems so hit or miss.. looking for advice! Again, if I go with another PSU manufacturer I’m going to be ordering new cables as well so that’s added $$

This is the first I'm hearing of the Prime series having any issues, they are some of the best testing PSU's for transients.  
 
Keep in mind Gold PSU's usually have better transient response than the Ti or Plat versions.

Can you elaborate or link discussions on why the transients are better in golds?

Here’s the discussion on the Prime units: https://forums.tomshardwa...3692042/#post-22258294

sstevens5

kevinc313

sstevens5
So after more reading I feel like I need to have a PSU on standby...

As stated I have the SeaSonic Focus PX750 now. I’m looking at another SeaSonic strictly because of their rep and the fact I already have braided cables in my system that I can use.

However I am looking at Corsairs AX850 Titanium (in stock) or an RMx 850 or 1000. I will admit, I impulsively ordered a SeaSonic PRIME TX850 yesterday but then just today started reading and was routed to some posts that the PRIME was mishandling certain issues worse than the FOCUS line?? Even JonnyGuru himself was discussing. It all seems so hit or miss.. looking for advice! Again, if I go with another PSU manufacturer I’m going to be ordering new cables as well so that’s added $$

This is the first I'm hearing of the Prime series having any issues, they are some of the best testing PSU's for transients.  
 
Keep in mind Gold PSU's usually have better transient response than the Ti or Plat versions.

Can you elaborate or link discussions on why the transients are better in golds?

Here’s the discussion on the Prime units: https://forums.tomshardwa...3692042/#post-22258294

Just my opinion after reading dozens of reviews in detail.  Ti units usually give up the most for the sake of efficiency.  Plat and gold units are usually similar.
 
"750w Platinum Seasonic Powersupply" is not a prime.  Johnny Guru is talking about an 'issue' with 12V sense, which may or may not be related.

Pwnstix
Thanks for linking that post. I wish I'd looked into transient response more closely before I'd got any of my Prime units. I didn't think I'd have to worry about it. But I'm getting reboots/shutdowns with my 3080 and TX-1000, and it does the same on my older Prime Titanium 750W. I'm looking into getting another PSU,but. ,yeah they're all out of stock.

No BSOD, just hard reset?
 
Would be interested to hear more about the 12v sense issue Jonny Guru mentions.

jankerson

sstevens5
My 3080 is coming and I’m looking to bump my SeaSonic Focus PX750 to 850. I have confirmation I can re use my braided CableMod cables as the pin outs are the same. However, with a 10700K, 4 case fans, 2 monitors (1 gaming is 1080p but looking to go 1440p soon), 2 SSD’s, etc I’ve been told that some 3080/90 are having transient spikes to almost 600W? Is this true? I’m not overclocking at the moment but I do plan to do a little with the gpu and probably the cpu soon. 1000W seems a little overkill but then again I don’t want to cut corners. Nvidia recs 750 as a minimum so I just want a peace of mind with a little headroom and unfortunately basically all 1000W and most 850W are sold out with SeaSonic (don’t want to re cable). Input is welcomed and reassurance is appreciated!

 
More like over 900W Transient power spikes for the 3080 FTW3 Ultra.
 
 

Where exactly are you seeing/recording these transient spikes?  The specs in my build are listed in my signature below - my GPU has never pulled more than 512watts from the official 500 watt XOC Bios.
I've since updated to the latest BIOS (3090 FTW3 Ultra version - since there is no hybrid-converted BIOS) and I get better performance, but I've never seen it pull more than about 485 - 500 watts in GPU-z.
 
I HAVE seen it pull as much as 83w through my PCI-E slot though, which I'm not sure if I need to worry about or not (considering my Mobo) as I know people are RMA'ing 3090s that pull more than the normal 75w from the PCIe slot.
 
As far as PSUs - with a hefty OC on both my i9-10900k, my RAM, and my 3090 - I'm using a 1000w EVGA G3 - but EVGA's own website tells me I really only need 750 watts.  
 
**I also have a brand new - still shrink-wrapped Corsair HX1000i Titanium PSU I am looking to sell - feel free to PM me if anyone is interested.  Ill sell it lower than any advertised price to a fellow GAMER (i.e. non-Miner) since I know the prices and availability are F'd atm.
(/edit - actually I have pretty much everything needed for a SWEET gaming rig for sale, other than RAM, GPU and a cooler for the CPU.  -   I have a 3 month old i7-10700k, 3-month old Asus Rog z490 F-Gaming Mobo, 3-month old Lian Li Dynamic 011 Case, 3-month old 8 x Corsair QL 120mm aRGB fans, 1 x 140mm QL Fan, 2 x ML 120mm Fans, 2 Lighting Node Pros and 2 LED Node Pros, 2 x EVGA 3300 RPM Fans from Hybrid Kit that are 100% unused, CoolerMaster ELV8 aRGB GPU anti-sag support, and the Corsair HX1000i Titanium PSU lol.)

kevinc313

sstevens5
Here’s the discussion on the Prime units: https://forums.tomshardwa...3692042/#post-22258294

Just for some context for some people.  "jonny guru" currently works as director of R&D for Corsair.  They have some PSU's made by Seasonic that use the Prime platform, that have a minor, known issue with what are apparently the +12V "sense" wires (thinner, doubled up wires on the 12V pins, used to monitor voltage), where there is noise on that wire.....?

I hate to sound like this, or even say this - but I've never bought Seasonic and probably wont, unless I'm building a generic rig.  I don't know a whole lot about the brand, but I personally consider them a middling product and priced as such.  I'd stick to the brands most commonly used by pc and pc gaming enthusiasts personally - i.e. a Corsair or EVGA...
 
MY RM1000i blew after about 5 years, and Corsair couldn't find me a replacement, which is how I ended up with a brand new, still shrink-wrapped HX1000i that I am going to sell.  I am CURRENTLY running my PC on EVGA's 1000w G3 and it's working absolutely perfectly.  I WAS running my i7-10700k and Asus z490 F-Gaming Mobo on a EVGA 1000w GQ and it ran perfectly too.  The only real difference being the GQ has the main motherboard ATX connection hard-wired, where the G3 is 100% fully-modular.  Either would work for you, including the 800w.