Pls Recommend a PSU - £100 or not much more

Excleduess said:
Which one did you get finally? I've been looking for a PSU for work machine as well.
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Sorry didn't know this thread was still going.

I'm still waiting for my order of the Corsair RM750x.

It's been out of stock for sometime but I'm noticing that some retailers are being restocked tomorrow so I'm hoping mine is too far away.

I've waited this long because mine is on a deal fro £100.

Vince said:
You dont need a 1000 watt supply as others have already said and it looks like you have also worked out :). Even with a threadripper thats somewhat overkill. To give an example I run a threadripper 1950x, 64gb ram, radeon 7, 3 nvme drives, a couple of ssds and around 4 mech drives and its all powered off of an 860w seasonic platinum series supply.

That same machine and same supply at points in its life has had 4 gpus in it at the same time (radeon 7, vega 64, and a couple of rx 570s) on top of all that hardware and the supply has never skipped a beat.
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Cheers yeah... @sadat recommended doing a virtual build with PC part picker to check how much wattage I really needed for now and future use (cheers @sadat ) so it opened my eyes a bit.

I found out a few days ago on post mortem of my dead PSU that it was actually a lowly 500W unit

No wonder it blew up with the power hog FX8350 and R9 draining it.

I really didn't remember...I could have sworn it was a 650 but I check an old scan receipt and the horror was revealed.

Just hope my PC still lives after all this.
 
myPCBlewUp said:
Sorry didn't know this thread was still going.

I'm still waiting for my order of the Corsair RM750x.

It's been out of stock for sometime but I'm noticing that some retailers are being restocked tomorrow so I'm hoping mine is too far away.

I've waited this long because mine is on a deal fro £100.



Cheers yeah... @sadat recommended doing a virtual build with PC part picker to check how much wattage I really needed for now and future use (cheers @sadat ) so it opened my eyes a bit.

I found out a few days ago on post mortem of my dead PSU that it was actually a lowly 500W unit

No wonder it blew up with the power hog FX8350 and R9 draining it.

I really didn't remember...I could have sworn it was a 650 but I check an old scan receipt and the horror was revealed.

Just hope my PC still lives after all this.
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Ooooooo, remind me never to make that mistake EVER! I hope it didn't damage any of your other components when it died...
 
Saul Farrell said:
Ooooooo, remind me never to make that mistake EVER! I hope it didn't damage any of your other components when it died...
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Should be fine! 99% of the time nothing gets taken out. I did have a cable take out a B450 motherboard and a 2700x a few weeks back though so fingers crossed for you.
 
Saul Farrell said:
Ooooooo, remind me never to make that mistake EVER! I hope it didn't damage any of your other components when it died...
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Yeah, just remember that if you update your PC a lot more than from when you bought it, especially if you do it over a long period of time, check on health of your PSU or just replace it as they do have a lifetime anyway.

Vince said:
Should be fine! 99% of the time nothing gets taken out. I did have a cable take out a B450 motherboard and a 2700x a few weeks back though so fingers crossed for you.
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Yeah here's hoping.
 
myPCBlewUp said:
Yeah, just remember that if you update your PC a lot more than from when you bought it, especially if you do it over a long period of time, check on health of your PSU or just replace it as they do have a lifetime anyway.



Yeah here's hoping.
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yeah I'm planning on replacing my psu when the warranty runs out. For such an important part it's not worth the risk. I'd rather spend some more money buying one with another 10 years warranty than not and having to spend thousands repairing the rig...
 
Vince said:
Should be fine! 99% of the time nothing gets taken out. I did have a cable take out a B450 motherboard and a 2700x a few weeks back though so fingers crossed for you.
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Yeah I'm very new to pc building and so scared of making a mistake like that. When I built my first PC a couple of weeks back I spent hours after I built it making sure that every single thing was plugged in and in the right place!
 
I'm a software engineer, when I left university I worked at a company part owned by a software developer that worked on Corcorde, fly why wire, head up display, all done in FORTRAN, he also worked inside the actual UK test Concorde 002 on the electronics bays.

His advice was pick a quality PSU, that's double the wattage of the computer, he said never skimp on the PSU.
 
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JasonM said:
I'm a software engineer, when I left university I worked at a company part owned by a software developer that worked on Corcorde, fly why wire, head up display, all done in FORTRAN, he also worked inside the actual UK test Concorde 002 on the electronics bays.

His advice was pick a quality PSU, that's double the wattage of the computer, he said never skimp on the PSU.
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Bloody good advice that...Also FORTRAN...Wow that's a bit old school :) I never learnt it myself, as went from Basic to Assembly, to Java and now settled on C# (which is almost the same but cleaner :) )

I think what some have missed here regarding the 'you don't need that much PSU' is two fold

1) There's no price on peace of mind if you can afford it

2) I equate it to a motor engine...If on say a 1 litre naturally aspirated (car as bikes that's a quite large capacity) and you are getting to high revs to achieve say 70 MPH, you are near the full potential of that motor and its under more strain than if you were at the same speed with a 2 litre.
 
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myPCBlewUp said:
Bloody good advice that...Also FORTRAN...Wow that's a bit old school :) I never learnt it myself, as went from Basic to Assembly, to Java and now settled on C# (which is almost the same but cleaner :) )

I think what some have missed here regarding the 'you don't need that much PSU' is two fold

1) There's no price on peace of mind if you can afford it

2) I equate it to a motor engine...If on say a 1 litre naturally aspirated (car as bikes that's a quite large capacity) and you are getting to high revs to achieve say 70 MPH, you are near the full potential of that motor and its under more strain than if you were at the same speed with a 2 litre.
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Buying a PSU double what the system needs may have been good advice then. Now its not.

The car analogy doesn't really work.

Say I have a PC that nominally draws 200 watts. If I buy a 2000 watt power supply it'll last forever right? Well no, do you know how inefficient a PSU is at 10% draw? That's not good for it's lifespan.

PSU's (in)efficiency under 20% load don't count towards it's 80plus certification and the PSU is at max efficiency around 50%.

Buy a PSU that is over 20% load at light use and around 50% when used for it's primary function.

For most people thats 500 - 650 watts. Despite those people that say their graphics cards draw 350 watts on their own!
 
After two weeks and Corsair not being upfront about availability, have cancelled the RM750x and gone for a Seasonic Focus GX 750.

£5 more expensive but at least I get it tomorrow.

Also I kept hearing persistent complaints about this Corsair model having coil whine, although doubt it would bother me if true anyway.
 
I've had my RM750x for over a year now - never heard any coil whine, and I keep my PC pretty silent and would notice :p

But yeah, stock is bad atm on a lot of things. That Seasonic model is a great choice as well anyway.
 
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