Unfortunately, this deal is no longer available
Corsair RM850 80 Plus Gold Certified, 850W Fully Modular PSU Power Supply £84.46 at Ebuyer/ebay with code (10 years warranty)
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Corsair RM850 80 Plus Gold Certified, 850W Fully Modular PSU Power Supply £84.46 at Ebuyer/ebay with code (10 years warranty)

£84.46£9410%eBay Deals
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Posted 26th Feb

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29 Comments
This or a little more for an RM750x? Slightly lower output power is a fine tradeoff if the PSU is better quality. Most people with a single GPU don't need more than this...
Better quality in what respect, This has a 10 year warranty,So what would you be paying the extra for.
chischis26/02/2020 12:47

This or a little more for an RM750x? Slightly lower output power is a fine …This or a little more for an RM750x? Slightly lower output power is a fine tradeoff if the PSU is better quality. Most people with a single GPU don't need more than this...


The 850 riotoro is 77 on ebuyer (same quality, 10 yr warranty- ignore out of date info on ebuyer) the 650 riotoro is 59 quid if you dont need 850 watts. If you do think you need 750 watts (Idunno a single card but some might be running two for cuda work) than yeah, the better corsair unit would be better as the riotoro 750 is not cheap currently.
babylon26/02/2020 12:49

Better quality in what respect, This has a 10 year warranty,So what would …Better quality in what respect, This has a 10 year warranty,So what would you be paying the extra for.


Better build quality in a shallower box.
.jonnyguru.com/blo…/6/
jonnyguru.com/blo…/6/

I take it back, the riotoro 750/ 850 is better built than this posted 850 unit.
Edited by: "joe_shmoe" 26th Feb
joe_shmoe26/02/2020 13:26

Better build quality in a shallower …Better build quality in a shallower box..http://www.jonnyguru.com/blog/2014/01/13/corsair-rm850-850w-power-supply-2/6/https://www.jonnyguru.com/blog/2018/05/08/corsair-rm750x-2018-750w-power-supply/6/I take it back, the riotoro 750/ 850 is better built than this posted 850 unit.


This is the 2019 RM which is better than the 2013 RM model you posted, but the 2018 RMx is still better than both of them.
rp712226/02/2020 14:00

This is the 2019 RM which is better than the 2013 RM model you posted, but …This is the 2019 RM which is better than the 2013 RM model you posted, but the 2018 RMx is still better than both of them.


Ah, fail on my part. Again, so much has changed since jonny gerow got hired by corsair. cheers pal.
joe_shmoe26/02/2020 13:02

The 850 riotoro is 77 on ebuyer (same quality, 10 yr warranty- ignore out …The 850 riotoro is 77 on ebuyer (same quality, 10 yr warranty- ignore out of date info on ebuyer) the 650 riotoro is 59 quid if you dont need 850 watts. If you do think you need 750 watts (Idunno a single card but some might be running two for cuda work) than yeah, the better corsair unit would be better as the riotoro 750 is not cheap currently.


I just bought the 850 Riotoro. Hearing really good things about it from reviews. For those who've never heard of it, it's a re branded quality Seasonic unit.
rp712226/02/2020 14:00

This is the 2019 RM which is better than the 2013 RM model you posted, but …This is the 2019 RM which is better than the 2013 RM model you posted, but the 2018 RMx is still better than both of them.



So it goes RM / RMi and the RMx is the next tier up before the HX range? If so I’d be more inclined to spend the not-that-much extra for RMx. The HX range is quite a step up in price, probably quality also, but that’s where I have to wonder if that’s where diminishing returns step in.

3950x and 2080TI setups can run within 600W so for those of us that don’t even run setups like that, I struggle to convince myself to buy PSUs much more powerful. Probably will get 650-750W for my Ryzen build but I think above that one is entering Threadripper / multi-GPU build territory.
PsillyPseudonym26/02/2020 14:21

I just bought the 850 Riotoro. Hearing really good things about it from …I just bought the 850 Riotoro. Hearing really good things about it from reviews. For those who've never heard of it, it's a re branded quality Seasonic unit.



kitguru.net/com…ew/
chischis26/02/2020 14:24

So it goes RM / RMi and the RMx is the next tier up before the HX range? …So it goes RM / RMi and the RMx is the next tier up before the HX range? If so I’d be more inclined to spend the not-that-much extra for RMx. The HX range is quite a step up in price, probably quality also, but that’s where I have to wonder if that’s where diminishing returns step in.3950x and 2080TI setups can run within 600W so for those of us that don’t even run setups like that, I struggle to convince myself to buy PSUs much more powerful. Probably will get 650-750W for my Ryzen build but I think above that one is entering Threadripper / multi-GPU build territory.


One point of note is that some motherboards require an 8 + 4 pin cpu socket and apart from the Corsair RMX650 all the other PSU that have this are 750W and above.
PsillyPseudonym26/02/2020 14:32

One point of note is that some motherboards require an 8 + 4 pin cpu …One point of note is that some motherboards require an 8 + 4 pin cpu socket and apart from the Corsair RMX650 all the other PSU that have this are 750W and above.



Thanks for the info! Does anyone else find this vary particular demarkation in product spec rather back-handed? Smells of “give people reasons to pay more for higher wattage” to me
PsillyPseudonym26/02/2020 14:32

One point of note is that some motherboards require an 8 + 4 pin cpu …One point of note is that some motherboards require an 8 + 4 pin cpu socket and apart from the Corsair RMX650 all the other PSU that have this are 750W and above.


Good info!
chischis26/02/2020 14:24

So it goes RM / RMi and the RMx is the next tier up before the HX range? …So it goes RM / RMi and the RMx is the next tier up before the HX range? If so I’d be more inclined to spend the not-that-much extra for RMx. The HX range is quite a step up in price, probably quality also, but that’s where I have to wonder if that’s where diminishing returns step in.3950x and 2080TI setups can run within 600W so for those of us that don’t even run setups like that, I struggle to convince myself to buy PSUs much more powerful. Probably will get 650-750W for my Ryzen build but I think above that one is entering Threadripper / multi-GPU build territory.


The RMi is very slightly better overall than the RMx with the main advantage being the corsair link (usb link to monitor psu) HX is very slightly better than RMi but is platinum rather than gold efficiency so has platinum prices.
PsillyPseudonym26/02/2020 14:32

One point of note is that some motherboards require an 8 + 4 pin cpu …One point of note is that some motherboards require an 8 + 4 pin cpu socket and apart from the Corsair RMX650 all the other PSU that have this are 750W and above.


Unless you are running something like a 64 core threadripper or overclocking with liquid nitrogen you don't need the extra 4 pin as with just 8pin you can supply over 300w.
chischis26/02/2020 14:35

Thanks for the info! Does anyone else find this vary particular …Thanks for the info! Does anyone else find this vary particular demarkation in product spec rather back-handed? Smells of “give people reasons to pay more for higher wattage” to me


'Probably'. Tho I really suspect you can get an adaptor for that. Also many of those boards flag up needing 2 inputs but willrun on one. Plus I think the riotoro 650 has 2x cpu (eps) leads. Now I'm really sure you could get an adaptor if the etx or whatsit socket is different.
( 2 x power 8 pin EPS12V with detachable 4 pin ATX12V section)
rp712226/02/2020 14:38

Unless you are running something like a 64 core threadripper or …Unless you are running something like a 64 core threadripper or overclocking with liquid nitrogen you don't need the extra 4 pin as with just 8pin you can supply over 300w.


I think this depends on the motherboard. Before I bought the Riotoro, I tried to do loads of research on this and for some people just the 8pin worked but for others the system was unstable.
I bought a HX750i for not much more than this many years ago. Probably the best component i've ever bought and has seen me through many builds.

Not sure about the full range of corsairs but on the hxi i went for alot more power than needed because of the semi passive fan. This fan has never even kicked in so have a lovely quiet system.

Corsair psu's are definately worth the investment.
Edited by: "m1keyp1key" 26th Feb
PsillyPseudonym26/02/2020 14:45

I think this depends on the motherboard. Before I bought the Riotoro, I …I think this depends on the motherboard. Before I bought the Riotoro, I tried to do loads of research on this and for some people just the 8pin worked but for others the system was unstable.


riotoro has ( 2 x power 8 pin EPS12V with detachable 4 pin ATX12V section)
joe_shmoe26/02/2020 14:59

riotoro has ( 2 x power 8 pin EPS12V with detachable 4 pin ATX12V section)


Thanks, I know the riotoro does have that, I was just trying to make it clear that there was still some debate as to whether motherboards with both 8 and 4 pins require both to be powered.
PsillyPseudonym26/02/2020 15:03

Thanks, I know the riotoro does have that, I was just trying to make it …Thanks, I know the riotoro does have that, I was just trying to make it clear that there was still some debate as to whether motherboards with both 8 and 4 pins require both to be powered.


The 650 rio has them, just for anybody thinking they must buy the 650 corsair.
edit ; it may be that the 650 has been discontinued. seems to be out everywhere on second look.
Edited by: "joe_shmoe" 26th Feb
PsillyPseudonym26/02/2020 14:45

I think this depends on the motherboard. Before I bought the Riotoro, I …I think this depends on the motherboard. Before I bought the Riotoro, I tried to do loads of research on this and for some people just the 8pin worked but for others the system was unstable.


Have never heard of any consumer motherboard that doesn't work with only 8 pin although have seen some claim you need to plug in the additional 4 or 8 pin but assume that is just to justify their expensive 1200w PSU on a PC that will in reality only use 300w of power. But PCmaster-race must meme though so lots of miss information out there.
rp712226/02/2020 15:41

Have never heard of any consumer motherboard that doesn't work with only 8 …Have never heard of any consumer motherboard that doesn't work with only 8 pin although have seen some claim you need to plug in the additional 4 or 8 pin but assume that is just to justify their expensive 1200w PSU on a PC that will in reality only use 300w of power. But PCmaster-race must meme though so lots of miss information out there.


I think I would have to research board by board, if you have several gpu cards installed you could melt the single 8 pin as they can pull 75 watts a piece.
Ok so RM - RMx - RMi - HX. A few poor reviews of the I series on Amazon though, so I'll stick with the RMx. Thanks for the help chaps. RM750x is £99 on Amazon which sounds fair.
joe_shmoe26/02/2020 15:50

I think I would have to research board by board, if you have several gpu …I think I would have to research board by board, if you have several gpu cards installed you could melt the single 8 pin as they can pull 75 watts a piece.


The 8 or 4 pin is only additional power for CPU though, the 75w for GPU comes from the 24 pin.

Off the top of my head for CPU power 8pin is 225w 4pin 150w and you get around 100w from 24pin.
rp712226/02/2020 15:56

The 8 or 4 pin is only additional power for CPU though, the 75w for GPU …The 8 or 4 pin is only additional power for CPU though, the 75w for GPU comes from the 24 pin. Off the top of my head for CPU power 8pin is 225w 4pin 150w and you get around 100w from 24pin.



Look at that oddball! is that molex for the extra slots?
joe_shmoe26/02/2020 16:36

[Image] Look at that oddball! is that molex for the extra slots?



Well, it IS an ASRock board :P
chischis26/02/2020 16:44

Well, it IS an ASRock board :P


Their cheap boards are better than gbte and asus.;#}
I prefer the cables that come with the RM over the RMx. They're the ribbon type and don't have capacitors in them. Makes them easier to route.
joe_shmoe26/02/2020 16:36

[Image] Look at that oddball! is that molex for the extra slots?


Two molexes/molexa/meelex..!!

39992083.jpg
Edited by: "Skwoddie" 26th Feb
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