Dedicated PSU for GPU

[Upgrayedd]

So I've been having power spike crashes I believe. I can stress the GPU hard and get a full system crash. This didn't really start happening until I swapped my old PSU into another system and used my Seasonic TX 850W, which is crashing.

My solution I was going to try was use a 2nd PSU I have but dedicate it to my GPU to try and rule out power problems.

The question about this is I can just lay that PSU on top or inside the case anywhere right? And for the powering on procedure wouldn't I want to start in a certain order?
So with everything off I should 1st switch ON the dedicated PSU for the GPU and then 2nd is flip the switch on the motherboard's PSU to ON. 3rd is start the PC.
Shutdown is just reverse order right?
I'm pretty sure that's how I used to do it with mining rigs but it's been a while and I wanted some clarification. No I won't be syncing the PSUs.

 

[Sevenhill]

you can just spend 4-7$ for one of those ATX splitter cables (sometimes they sold named under Dual-PSU ATX adapter)
another way is to spend 7 - 12 $ to buy one of those DualPSU circuits/boards
so both of your PSUs will kick at same time.
I'm attaching both of their photos for refrence

 

[eidairaman1]

So I've been having power spike crashes I believe. I can stress the GPU hard and get a full system crash. This didn't really start happening until I swapped my old PSU into another system and used my Seasonic TX 850W, which is crashing.

My solution I was going to try was use a 2nd PSU I have but dedicate it to my GPU to try and rule out power problems.

The question about this is I can just lay that PSU on top or inside the case anywhere right? And for the powering on procedure wouldn't I want to start in a certain order?
So with everything off I should 1st switch ON the dedicated PSU for the GPU and then 2nd is flip the switch on the motherboard's PSU to ON. 3rd is start the PC.
Shutdown is just reverse order right?
I'm pretty sure that's how I used to do it with mining rigs but it's been a while and I wanted some clarification. No I won't be syncing the PSUs.

Are you on a 3060?

Have you tried it in another system?

It might be failing, and not your psu.

 

[Upgrayedd]

Are you on a 3060?

Have you tried it in another system?

It might be failing, and not your psu.

No it's a 3090. My system specs may need to be updated on TPU. Didn't used to do this until I swapped PSUs. Pretty sure the card is fine, I can repeat the crash and alleviate it by managing the power consumption of the card.

 

[ir_cow]

I've powered just the GPU(s) with different PSUs .Either get the dual 24pin thing that makes it so the second one turns on with the first. Or the old fashion way. Jump green and black pins with a paperclip (or use a official thing). Make sure it's turned on and running before turning on the computer side the GPu needs to be detected during boot.

I may have run a 2nd PSU for a few months because I was lazy and didn't want to swap out the case on before

 

[eidairaman1]

I've powered just the GPU(s) with different PSUs .Either get the dual 24pin thing that makes it so the second one turns on with the first. Or the old fashion way. Jump green and black pins with a paperclip (or use a official thing). Make sure it's turned on and running before turning on the computer side the GPu needs to be detected during boot.

I may have run a 2nd PSU for a few months because I was lazy and didn't want to swap out the case on before

Iirc there is an adapter that allows both to start up at the same time

 

[ir_cow]

Iirc there is an adapter that allows both to start up at the same time

Buuuuuut paperclip!!

 

[eidairaman1]

Buuuuuut paperclip!!

I'm thinking on safety, no arcing accidentally

 

[freeagent]

I have one of those, came with my Stacker.

I dunno man... there was a time when I would have run dual PSU's.. but I think I would rather just roll with one solid one.

But.. you cant always get what you want, so what you need is the adapter, or a paperclip

 

[DirtyDingusMcgee]

Adapter

yeah, they aren't expensive and they work.

Kinda sounds like you just need a new power supply though. Even with a 3090, that 850w should be fine. If it's not enough, you are running some wild stuff.

 

[ir_cow]

I'm thinking on safety, no arcing accidentally

You can lick it. No arcing

 

[eidairaman1]

You can lick it. No arcing

No thanks

 

[Apocalypsee]

You can lick it. No arcing

Yeah, the green wire only for power on there won't be any arching of high current. I done this many moons ago, it's totally safe.

 

[Upgrayedd]

Adapter

yeah, they aren't expensive and they work.

Kinda sounds like you just need a new power supply though. Even with a 3090, that 850w should be fine. If it's not enough, you are running some wild stuff.

It's just power spikes that do it I'm pretty sure. Doesn't seem to handle it as well.

I've powered just the GPU(s) with different PSUs .Either get the dual 24pin thing that makes it so the second one turns on with the first. Or the old fashion way. Jump green and black pins with a paperclip (or use a official thing). Make sure it's turned on and running before turning on the computer side the GPu needs to be detected during boot.

I may have run a 2nd PSU for a few months because I was lazy and didn't want to swap out the case on before

When I had a mining rig going I was on 220v with my current PSU, the 850 TX, running the mobo and a few cards while a server grade 2200w or 2400w took care of the rest of the cards.
I'm pretty dang sure I didn't use any clips or jumpers or adapters like that. As long as I had the server supply on first so those gpus would power on and be detectable.
Now what you guys are probably right about is a secondary ATX supply isn't going to just power up a card like a server PSU did. So I think that 850TX came with an adapter too. The secondary supply would be an eVga 850 G2. I'll have to dig out the box.

 

[ir_cow]

Maybe that server PSU was always-on type? I've dealt with that in industrial stuff. Once it gets power, all lines are hot.

Really haven't heard of any ATX PSU turning on by itself. Needs some feedback on / voltage request. Power is dumb, not smart.

 

[Ruru]

Remember these? I bet that similar but modern and beefier ones would actually be somewhat popular if modern cases had 5.25" bays.

Thermaltake Power Express 250W Review

The Thermaltake Power Express 250W is a video card power supply specifically designed for the needs of current high-end video cards. When you have an older PSU you may not be able to run Crossfire or SLI because the PSU can not supply enough power for the video cards to run stable. When...

www.techpowerup.com

 

[_roman_]

Before you do it think about GND. (i talk about the wiring / and not all the details i hint out)

 

[Upgrayedd]

Maybe that server PSU was always-on type? I've dealt with that in industrial stuff. Once it gets power, all lines are hot.

Really haven't heard of any ATX PSU turning on by itself. Needs some feedback on / voltage request. Power is dumb, not smart.

The server psu had a breakout board for connections and control. It was just ON/OFF there was no detection that I remember.

Using an adapter or paperclip would just essential be my controls from the old server style setup.

Having the adapter always plugged into the secondary PSU should just fire the GPU up right away upon flipping the switch on the PSU, right? Turning the card on or off should just be the switch on the PSU?

Before you do it think about GND. (i talk about the wiring / and not all the details i hint out)

Think about the grounding wire? Is that what you mean?
I have, it's probably not correct honestly, the house is older, I think a few too many corners cut. The surge protector says it's not grounded, though it doesn't always show that so I don't know why exactly it shows that sometimes grounded and sometimes not.

If the secondary PSU doesn't fix it I was going to just run a new breaker to this side of house. Needs it anyways but I just need a real reason to do it, maybe it's finally the one reason that's going to make me do it?

 

[eidairaman1]

The server psu had a breakout board for connections and control. It was just ON/OFF there was no detection that I remember.

Using an adapter or paperclip would just essential be my controls from the old server style setup.

Having the adapter always plugged into the secondary PSU should just fire the GPU up right away upon flipping the switch on the PSU, right? Turning the card on or off should just be the switch on the PSU?

Think about the grounding wire? Is that what you mean?
I have, it's probably not correct honestly, the house is older, I think a few too many corners cut. The surge protector says it's not grounded, though it doesn't always show that so I don't know why exactly it shows that sometimes grounded and sometimes not.

If the secondary PSU doesn't fix it I was going to just run a new breaker to this side of house. Needs it anyways but I just need a real reason to do it, maybe it's finally the one reason that's going to make me do it?

The adapter should immediately power the 2nd psu up

 

[Upgrayedd]

After trying a dedicated 2nd Psu, my shutdown problem is gone.

I've updated my system specs for anyone curious, an 11900K, RTX 3090 and Seasonic 850 TX.

 

[Bobaganoosh]

There were several of the seasonic supplies (among others) that could not handle the spikes from a 3090 when they came out. Back then, Seasonic was one of the brands offering replacements in that situation. Most of the companies came out with new power supply versions after that so they could handle the spikes.

 

[Zazigalka]

After trying a dedicated 2nd Psu, my shutdown problem is gone.

I've updated my system specs for anyone curious, an 11900K, RTX 3090 and Seasonic 850 TX.

iirc, those seasonic 850 units are designed to handle 1100+w spikes.
closer to 1200 actually

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Seasonic made an impressive entry in the 80 PLUS Titanium category with its Prime series. This line's current flagship, offering 850W capacity, is being reviewed today. Besides high efficiency, it sports quiet operation and top performance.

www.tomshardware.com

Seasonic Focus Plus Gold 850 PSU Review

After evaluating Seasonic's 750W Focus Plus Gold power supply, which left a good impression on us, it's time to review that family's flagship, the SSR-850FX.

www.tomshardware.com

from the review

the PSU doesn't have any problems under almost 1.2kW of load (at normal ambient temperatures, at least)