First, they blew up my PSU:3080 FTW3 Ultra (XOC BIOS tested) Power from the wall numbers

[dowcow]

I have a OC Trinity 3080 in a rig with a Corsair AX750, age not sure now but I think I might have bought it to go with a triple slot ROG GTX 580... so possibly getting on a bit. Last night something really weird happened, and I thought I was going to have to buy a new PSU today... actually I still might later. I powered down the machine for about 20 minutes but then on returning plugged another monitor in to a DP, (already had one on DP and another on HDMI). Then it wouldn't power back up. It wouldn't even spin fans or give any indication power button had been pressed, even with the mobo onboard power button. I swapped out the gpu for another, heart pounding... still didn't power up. Thoughts were that this was a dead PSU or mobo. Went to bed... not feeling good as mobo is a MSI Prestige Creation x570 which doesn't seem to be available anymore. Anyway, it powered up fine this morning... kinda, it seems GRUB has thrown a wobbler but managed to boot Windows directly off its drive, but the Linux install is going to need repairing. Checked the disks in a usb drive Linux distro and they seem okay, but have had a CRC error on one or more of the old Sata drives (system has three sata SSDs and one M2 NVME).

So... maybe PSU related.... maybe not. I am thinking a loose sata cable as the drives are plugged into a backplane too. But the way it wouldn't even attempt to power on last night, and the age of the PSU, thinking maybe a nice new Super Flower might be the way to go. Normally I never power down the machine, only really for hardware changes, so it has potentially done in the region of 9 years of good solid service.

Edit: It seems a Windows update turned Hibernate/Fast Resume on, and borked Grub at the same time. Joy.

 

[3t3P]

NEW peak number of 763.6W from the wall.

 

[Rroff]

Edit: It seems a Windows update turned Hibernate/Fast Resume on, and borked Grub at the same time. Joy.

Windows 10?

I have it dual booted on this rig and after an update recently I had to repair the bootloader - thought it was just a random thing - no problems powering up though.

 

[Brazo]

RTX 3080 stock bios
3800x
Aio Cpu cooler
2 x ssd
2X nvme

Can’t get at wall figures over 470w

Using a 700w psu.

 

[dowcow]

Windows 10?

I have it dual booted on this rig and after an update recently I had to repair the bootloader - thought it was just a random thing - no problems powering up though.

Repaired the boot loader now, and it has been switched off several times since and has come back up just fine. I think it is just dodgy suspend/sleep settings and trying to resume from a fairly chaotic drive and partitioning system. I tend to disable it, bloody rude that a win10 update should just assume it can turn it back on. I only booted and updated Windows because I was building a PC for my nephew and dd wasn't building a USB win10 iso that would work properly to install on his PC, suspect more deliberate sabotage of Microsoft's creation.

I'll buy another PSU at some point soon simply because Titanium and Platinum 80+ are a thing now, but doubt I'll be replacing the 750w with anything more than a 750W. There might be potential high peak loads on the psu, but high quality units are designed to handle them. If these GPUs needed such power continuously they would have more than the two 8pin power connectors my GPU and most other 3080s have, and what is the point of a 750W rated PSU if it can't handle running at it's rated capacity, never-mind just peaking there occasionally.

 

[no_1_dave]

Palit 3080 stock bios
9900k stock
AIO cooler + 2 additional intake fans
2x NVME and 2x Storage drives

650w Corsair RM650x PSU

Not seen over 500w from the wall and that was while encoding a 4K x265 movie with ffmpeg maxing out the CPU whilst also playing Horizon Zero Dawn.
I wanted to see if I could do both at the same time and I can with only the odd stutter/hitch

Don't understand why some people say they need 1000w etc. Maybe 750-850 if you're heavily overclocking and watercooled, but the majority of people will be fine with 650-750 if they have a 3080

 

[Brazo]

Palit 3080 stock bios
9900k stock
AIO cooler + 2 additional intake fans
2x NVME and 2x Storage drives

650w Corsair RM650x PSU

Not seen over 500w from the wall and that was while encoding a 4K x265 movie with ffmpeg maxing out the CPU whilst also playing Horizon Zero Dawn.
I wanted to see if I could do both at the same time and I can with only the odd stutter/hitch

Don't understand why some people say they need 1000w etc. Maybe 750-850 if you're heavily overclocking and watercooled, but the majority of people will be fine with 650-750 if they have a 3080

I agree plus if you undervolt the 3080 it improves performance, thermals and noise and of course reduces power consumption.

I averaged 49c on my timespy run (max 56c) and that was on air! WTF?!!!!

 

[gpuerrilla]

Repaired the boot loader now, and it has been switched off several times since and has come back up just fine. I think it is just dodgy suspend/sleep settings and trying to resume from a fairly chaotic drive and partitioning system. I tend to disable it, bloody rude that a win10 update should just assume it can turn it back on. I only booted and updated Windows because I was building a PC for my nephew and dd wasn't building a USB win10 iso that would work properly to install on his PC, suspect more deliberate sabotage of Microsoft's creation.

I'll buy another PSU at some point soon simply because Titanium and Platinum 80+ are a thing now, but doubt I'll be replacing the 750w with anything more than a 750W. There might be potential high peak loads on the psu, but high quality units are designed to handle them. If these GPUs needed such power continuously they would have more than the two 8pin power connectors my GPU and most other 3080s have, and what is the point of a 750W rated PSU if it can't handle running at it's rated capacity, never-mind just peaking there occasionally.

This is good feedback and makes sense. I would happily upgrade my gold rate 750w PSU as its nearly 7 years old I think now but its a solid brand. The main reasons Im not diving at it is there is a short stock of them (probably as everyone is either building systems for xmas rigs or upgrading theirs as they had a feeble one before) and the prices of the average ones seems to have bumped up the quality ones. 1000w ones seem to be £150+ which seems to be overkill just for the sake of coping with freak spikes.

Gonna undervolt until I spot a 'deal' I think. I can relegate this PSU to my server machine at the time.

 

[dowcow]

That's exactly what I thought too when looking through what was in stock... the models I want just aren't there right now. It has been a strange year.

 

[gpuerrilla]

That's exactly what I thought too when looking through what was in stock... the models I want just aren't there right now. It has been a strange year.

Yeah, exactly - I would happily upgrade to a 1000w Seasonic then the cheapest I can find one is £150 and its not in stock yet. I would sway to a really good 850w but then its gotta be under a ton for me to be considered decent value.

 

[keyser]

Don't understand why some people say they need 1000w etc. Maybe 750-850 if you're heavily overclocking and watercooled, but the majority of people will be fine with 650-750 if they have a 3080

This. This is the problem I have. No one says anything for 3070, until you mention 3080 apparently then I need a 1000W PSU.

 

[keyser]

NEW peak number of 763.6W from the wall.

87% efficiency of 763W AC = 663W DC. What was your point again?

 

[james.miller]

Why are you so desperate to discredit a recommendation? people arent mentioning the 3070 because the OP isnt using a 3070, he's using a custom 3080 with a 450watt bios flash. simple enough, no?

87% efficiency of 763W AC = 663W DC. What was your point again?

beyond telling us how much he's pulling from the wall, i dont think he has any other point? What's your point?

 

[keyser]

OPs Asus Strix 750W should be fine.

 

[james.miller]

Should be.

Well that's me convinced.

 

[keyser]

Nvidia officially recommend use a 750W PSU for 3080. OPs welcome to use something bigger since he's overclocking. If you look back at this thread we discovered many people are fine using a 3080 on a decent 600-650W PSU if at stock speeds. And since 750 > 650, it should be fine

 

[james.miller]

Nvidia aren't selling 450w 3080s. A point you seem to deliberately miss again and again.

 

[keyser]

Why do people think PSU blow up coz they have a lot of power draw. They blow due to leaky capacitors. Manufactures know this and create a circuit that prevents over current (Over Current Protection). Back in the day I think there was the Hyper PSU that blew and took PC with it. Has that happened since? A 750W PSU would probably be fine, since his setup is drawing 663W DC peak, if it shuts down, try 850W PSU. I'm dizzy.

 

[Grim5]

Why do people think PSU blow up coz they have a lot of power draw. They blow due to leaky capacitors. Manufactures know this and create a circuit that prevents over current (Over Current Protection). Back in the day I think there was the Hyper PSU that blew and took PC with it. Has that happened since? A 750W PSU would probably be fine, since his setup is drawing 663W DC peak, if it shuts down, try 850W PSU. I'm dizzy.

its rarer these days for the psu to damage system components

but yeah it happened to me in 2005 - psu blew and took the mobo, hard drives, CD drives and cpu with it

 

[james.miller]

Why do people think PSU blow up coz they have a lot of power draw. They blow due to leaky capacitors. Manufactures know this and create a circuit that prevents over current (Over Current Protection). Back in the day I think there was the Hyper PSU that blew and took PC with it. Has that happened since? A 750W PSU would probably be fine, since his setup is drawing 663W DC peak, if it shuts down, try 850W PSU. I'm dizzy.

'Should be' . 'Probably' . Do you know anything for certain or are you just guessing?

It's not a good idea to run a psu on the edge of its capabilities. I don't think anybody mentioned it 'blowing up'. You seem to be straw manning a lot?