Is my PSU enough?

[DiogoCDS19]

Hello!
I have a Corsair RM850.
I would like to know if this PSU can handle 1x GTX 980Ti and a 1x R9 280x.
Checked those wattage calculators and supposedly my whole system + that R9 280x would use around 850W.
I measured my system on full load and it uses 400w.
Can anyone help ?
Thank you.

 

[FreedomEclipse]

Can't speak for your full system as i have no idea what you're running but both cards together should pull between 600-650w on their own

 

[DiogoCDS19]

The 7700K would pull what ? 100-120W? ( around 70% usage)
If the PSU can’t handle it what would happen? Computer just shuts down? or any damage could happen?
Thank you

 

[ArbitraryAffection]

Your PSU should be enough. And if you exceed the rated power of the PSU most good units can go over their rated spec for a short time but if it has protections it should just shut down.

 

[FreedomEclipse]

Depends if your CPU is OC'd. 100-120w is a good rough estimate though you'll probably be pulling less at 70%

 

[Liviu Cojocaru]

Imo the PSU should be ok with what you have there, at full load you can probably get up to 650-700w something like that

 

[EarthDog]

Can't speak for your full system as i have no idea what you're running but both cards together should pull between 600-650w on their own

both cards are 250w...at stock, full load, both cards will be at or under 250w each... so 500W. 600W+ is a gross miscalculation.

7700k is a 91W cpu... so if its running at full tilt stock, about 91W. Overclocked it can 120W on full load...


Psu will be fine, especially at stock..even some overclocking headroom.


Why are you mixing cards?? Mining or something?

 

[FreedomEclipse]

both cards are 250w...at stock, full load, both cards will be at or under 250w each... so 500W. 600W+ is a gross miscalculation.

I went by the reviews on tomshardware

280X:

For the torture tests 257+254=511w.

600w+ was just me making a guestimate as i had just woken up and was still in bed checking emails from my phone. I wouldnt go as far as calling 600w a 'gross miscalculation' as you so kindly put it. Had i outright recommended a 1.5kw PSU then you would definitely have reasons for concern. 600w would be a 'ballpark' number if i had to throw something out there at short notice.

 

[dirtyferret]

both cards are 250w...at stock, full load, both cards will be at or under 250w each... so 500W. 600W+ is a gross miscalculation.

7700k is a 91W cpu... so if its running at full tilt stock, about 91W. Overclocked it can 120W on full load...


Psu will be fine, especially at stock..even some overclocking headroom.


Why are you mixing cards?? Mining or something?

This, not sure where that other poster got his numbers but they are grossly over exaggerated.

 

[cucker tarlson]

If the PSU can’t handle it what would happen? Computer just shuts down? or any damage could happen?
Thank you

That depends on the PSU. It should shut down before any damage is done. However, your PSU has no OCP, which should be an essential feature in any modern PSU, but I don't think you'll exceed the current with 980Ti, 280X and 7700K even if they were all running a pretty high OC.


Edit: according to TT it does have OCP, which makes it safer.

 

[EarthDog]

I went by the reviews on tomshardware


For the torture tests 257+254=511w.

600w+ was just me making a guestimate as i had just woken up and was still in bed checking emails from my phone. I wouldnt go as far as calling 600w a 'gross miscalculation' as you so kindly put it. Had i outright recommended a 1.5kw PSU then you would definitely have reasons for concern. 600w would be a 'ballpark' number if i had to throw something out there at short notice.

Sorry, I just thought ~20-30% is a gross miscalculation. Perhaps 'gross' was a bit too much, but the calculation was enough to warrant a different PSU when the OP doesn't really need one considering you have the CPU at 120W max as well, that puts you at 770W worst case. Even I wouldn't leave that little headroom left and I am probably the one here at TPU who doesn't overbuy on PSU wattage.

 

[FreedomEclipse]

This, not sure where that other poster got his numbers but they are grossly over exaggerated.

Its at -- And i know this because I am that 'Other Poster'.

I also looked at the 7700k and that drinks about 100w if OC'd to 4.5Ghz, but since the OP is only using it at 70% It would probably be just under 100w??? Worst case scenario being almost 140w

I think the RM850 should be able to scrape by pretty easy so long as CPU is at stock or OC'd with moderation. Corsair have really beefed up the RM line over the last 6 months to make it more in line with the previous premium 'AX' line of PSUs that are made by Seasonic... Providing its a 'newer' RM850 it should be no different from an AX860 (A PSU i actually owned)

Go easy on the case fans and no USB hand warmers and things should be still gravy

 

[EarthDog]

He won't need to go easy on anything, except overclocking. He can load up a dozen average joe case fans and RGB LED bling and several USB devices (remember it doesn't use the 12V rail...) and still be ok.

The 25xW readings there were from worst case stress testing as well. Which is not a typical load and only hit while stress testing. Your own images (it would be helpful to also provide a link to the review(s) as well) show notably less with normal loads.

 

[FreedomEclipse]

He won't need to go easy on anything, except overclocking. He can load up a dozen average joe case fans and RGB LED bling and several USB devices (remember it doesn't use the 12V rail...) and still be ok.

The 25xW readings there were from worst case stress testing as well. Which is not a typical load and only hit while stress testing. Your own images (it would be helpful to also provide a link to the review(s) as well) show notably less with normal loads.

All you had to do was ask

980Ti Review
280X Review
7700k Review

The 25xW readings there were from worst case stress testing as well. Which is not a typical load and only hit while stress testing. Your own images (it would be helpful to also provide a link to the review(s) as well) show notably less with normal loads.

My previous picture shows 'Gaming Load' ??? what is a typical/normal load to you?

 

[EarthDog]

I did ask (via statement - to which you obliged above), but it would be nice if when people referenced information and dropped images in, a link to the source(s) would be included.

Your math, 254+257 = 511W was using stress testing values. For the 980Ti, you used the stress testing value of 257W. Gaming was 23W less at 233W. For the 280X you used the GPGPU result, not gaming resulting in a difference of 50W from 257 to 207W.

So while gaming, a more typical load, it would be 440W between the two cards.

Anyway, they can't even game together really so, no idea what is going on with the cards 15 posts in. He's may be wanting to mine which people lower speeds and power anyway, so there is that (potential) consideration as well.

 

[r9]

850w is plenty. If you have any issues would not be the rated wattage but the quality of that PSU.

 

[FreedomEclipse]

I did ask, but it would be nice if when people referenced things and dropped images in, a link to the source(s) would be included.

And how hard would it be to type 'tomshardware 280X or 980ti or 7700k' Into google? And tomshardware logo is pretty prevalent in all my images so you know where the source is. I saw no need to drop links to my posts (unless it was requested) because I have nothing to prove or debunk.

Your math, 254+257 = 511W was using stress testing values. For the 980Ti, you used the stress testing value of 257W. Gaming was 23W less at 233W. For the 280X you used the GPGPU result, not gaming resulting in a difference of 50W from 257 to 207W.

So while gaming, a more typical load, it would be 440W between the two cards.

Anyway, they can't even game together really so, no idea what is going on with the cards 15 posts in. He's may be wanting to mine which people lower speeds and power anyway, so there is that (potential) consideration as well.

fair point about the GPGPU callout. I based the numbers on the worst case scenario which is going to be full tilt at mining and imo mining stresses a GPU though it might not be in the same way as an actual stress test designed for stressing GPus. I used GPGPU wattage numbers because there was a lack of better option. Im sure i could have googled harder for it but I was lazy. Mining still makes use of GPGPU does it not?

 

[Jetster]

Yes

 

[EarthDog]

And how hard would it be to type 'tomshardware 280X or 980ti or 7700k' Into google? And tomshardware logo is pretty prevalent in all my images so you know where the source is. I saw no need to drop links to my posts (unless it was requested) because I have nothing to prove or debunk.



fair point about the GPGPU callout. I based the numbers on the worst case scenario which is going to be full tilt at mining and imo mining stresses a GPU though it might not be in the same way as an actual stress test designed for stressing GPus. I used GPGPU wattage numbers because there was a lack of better option. Im sure i could have googled harder for it but I was lazy. Mining still makes use of GPGPU does it not?

I tried that and landed on a different review of a 980ti at toms. Hence the 'ask'. Thank you for doing so. It is appreciated and helpful to do moving forward. The picture, while its worth a 1000 words, the link can provide information such as their testing and measuring methods which can obviously come into play. We've seen users post system power as GPU only power before, to name one example.

Again, a lot of mining doesn't seem to make cards hit the TDP and miners strive to use the least amount of power possible. they lower speeds of somethings (raise others of course), but have mining BIOS's that are faster and use less power, etc. I think @cdawall posted something about that in another thread.

I guess my point is, unless his goal is to use stress testing, the guy isn't even at 500W between the two cards. So his PSU will be fine unless he is trying to overclock the snot out of everything to which he may then hit 800W.

 

[dirtyferret]

850w is plenty. If you have any issues would not be the rated wattage but the quality of that PSU.

It's a well reviewed PSU both by Jonnyguru & TPU. Some fanboys flip out on the secondary caps but to quote OKwolf on the subject

"Chicony knows their business well enough to make even crap capacitors last forever. Heck, they're just like Delta in that regard, who also uses Ltec a lot."

It's not up to the current standard of offerings but back in 2013-14 (whenever it was released) it was solid and capable PSU.

 

[cdawall]

Is this just for mining? 280x's and 980ti's can be power whores. I could easily max out an 850w with those, however setup like a normal person it won't use over 600w which is fine on an rm 850 if both the gpus and psu are correctly configured.

My signature should show what can run on what psu pretty well. That 850w Thermaltake that is listed is from 2008 its not technically even an 80+ unit since it existed before that.

 

[DiogoCDS19]

Woah, wasn’t expecting so much information!
Thank you all!
And yes it’s for mining.
I used a device to measure the wattage, and like I said it’s pulling 400w with the cpu at 70% (4.5ghz) and the 980ti overclocked.
Even if the 280x pulls 300w wouldn’t that be Ok?
Long story short, friend is going to give me his 280x so I thought about adding it just for mining.

 

[Space Lynx]

Woah, wasn’t expecting so much information!
Thank you all!
And yes it’s for mining.
I used a device to measure the wattage, and like I said it’s pulling 400w with the cpu at 70% (4.5ghz) and the 980ti overclocked.
Even if the 280x pulls 300w wouldn’t that be Ok?
Long story short, friend is going to give me his 280x so I thought about adding it just for mining.

I assumed as much, which is why I did not bother helping you. I am sorry that everyone else wasted their time to help what is the scourge of our hobby and enjoyment. Not only GPU shortage every release, but higher prices expected with next gen releases as well. Mining is a scourge and has ruined my hobby, and is the reason I am on integrated graphics at the moment. Oh well. Such is life. I'm glad I didn't help you though.

 

[Norton]

I assumed as much, which is why I did not bother helping you. I am sorry that everyone else wasted their time to help what is the scourge of our hobby and enjoyment. Not only GPU shortage every release, but higher prices expected with next gen releases as well. Mining is a scourge and has ruined my hobby, and is the reason I am on integrated graphics at the moment. Oh well. Such is life. I'm glad I didn't help you though.

This kind of comment really isn't needed here- reply to the topic or don't reply and move along.

If this was for a folding setup then the OP's questions would be just as valid

 

[DiogoCDS19]

Well I’m sorry if I offended anyone. Didn’t mean to do that. Saw the cryptocurrency subforum, had no idea this was so hated here. I’m sorry again and thank for those who helped. Still @lynx29 wish you the best.