Difference between Corsair RM850 & RM850x?

reckoning · 18 Sep 2021 at 10:11

Does anyone know the difference between these two models? They are both gold rated both come with a 10 year warranty and I’m not seeing the difference in specs to warrant the price increase of the RM850x.

I was about to buy the 850 but wonder if I’m missing something with the 850x?

RM850 - https://www.overclockers.co.uk/cors...lar-power-supply-cp-9020196-uk-ca-24t-cs.html

RM850x - https://www.overclockers.co.uk/cors...fully-modular-atx-power-supply-ca-267-cs.html

thanks

rare · 18 Sep 2021 at 10:21

It’s down to the quality of the capacitors from what I can remember when I looked in to it. The x variant uses higher quality Japanese capacitors, the non x variant probably uses Chinese made capacitors.

I owned an x before and it’s a superb PSU. Given the current price difference and the fact that they are both backed up by a ten year warranty I would probably opt for the cheaper one - seems like a decent saving to be made.

reckoning · 18 Sep 2021 at 15:10

Ok cheers, I’ll probably stick with the plain 850 then.

thanks for clarifying.

pastymuncher · 19 Sep 2021 at 11:56

Better quality components in the RMx series which includes the fan. The 2021 RM850x was a no brainer a couple of weeks ago when it was just £109.99, I even bought one myself.

mattyfez · 19 Sep 2021 at 13:06

Depending on the price difference at the time it may or may not be worth it.
I went with the standard RM.. They both have ten year warranties.

I'm totally happy with the RM.. It's quiet and the fan doesn't spin unless it's over 30% load or something.

The RMx is of course slightly technically better but really it all comes down to the price differences at the time of purchase as to whether you think its worth the extra.

mattyfez · 19 Sep 2021 at 13:19

At the current price difference of £90 vs £130 I'd argue the RMx is not worth the extra.

Grim5 · 23 Sep 2021 at 20:21

reckoning said:
Does anyone know the difference between these two models? They are both gold rated both come with a 10 year warranty and I’m not seeing the difference in specs to warrant the price increase of the RM850x.

I was about to buy the 850 but wonder if I’m missing something with the 850x?

RM850 - https://www.overclockers.co.uk/cors...lar-power-supply-cp-9020196-uk-ca-24t-cs.html

RM850x - https://www.overclockers.co.uk/cors...fully-modular-atx-power-supply-ca-267-cs.html

thanks

Probably the internal components differ somewhat. A review would show any difference

https://www.tomshardware.com/reviews/corsair-rm850-power-supply,6127-6.html

https://www.tomshardware.com/reviews/corsair-rm850x-2021-power-supply-review/6

According to those tomshardware reviews, the 850 has 2.53% lower performance than the 850x, it uses Chinese capacitors instead of Japanese capacitors and it has a noisier fan than the 850x

mattyfez · 24 Sep 2021 at 16:25

Noisier in relative terms though.. I don't think I've ever heard my RM. When it does spin up it's certainly drowned out by the GPU lol

dave28 · 24 Sep 2021 at 16:37

Or get a Seasonic focus gx 850

mattyfez · 24 Sep 2021 at 17:09

I went for a 750w and it was literally a coin toss between the corsair RM and the seasonic GX.. . There's really nothing in it, unless prices fluctuate in which case just get whatever is cheaper at the time.
That would be my advice anyway.

JollyJamma · 12 Oct 2021 at 09:29

Grim5 said:
According to those tomshardware reviews, the 850 has 2.53% lower performance than the 850x, it uses Chinese capacitors instead of Japanese capacitors and it has a noisier fan than the 850x

Chinese caps are absolutely fine. People get hung up on them but it was only a problem years ago when there was an issue. Now, Japanese caps are just far more expensive for a small improvement.

No way would I pay an extra £40 for the RMX.

LOAM · 30 Oct 2021 at 18:35

Does anyone with an RMX know if the supplied cables are individually sleeved or do I need to buy them extra?

pastymuncher · 31 Oct 2021 at 20:19

The 2021 RMx has ribbon cables for sata/molex, the rest are sleeved (not individually). They are horrible cables, bulky as hell due to the caps in them and very stiff so you can't get anything like a tight bend in them. The worst cables I have ever had with a psu which is why I am using extensions on them. Corsair are too tight fisted to even supply a decent bag for the psu and cables. My psu itself was in a sealed clear plastic bag and the cables were in another clear sealed plastic bag which has to be cost cutting because the pre 2021 unit came in a nice fabric bag with another for the cables. It didn't even come with Nvidia 12 pin cables which is strange for a 2021 revision.

LOAM · 1 Nov 2021 at 19:21

pastymuncher said:
The 2021 RMx has ribbon cables for sata/molex, the rest are sleeved (not individually). They are horrible cables, bulky as hell due to the caps in them and very stiff so you can't get anything like a tight bend in them. The worst cables I have ever had with a psu which is why I am using extensions on them. Corsair are too tight fisted to even supply a decent bag for the psu and cables. My psu itself was in a sealed clear plastic bag and the cables were in another clear sealed plastic bag which has to be cost cutting because the pre 2021 unit came in a nice fabric bag with another for the cables. It didn't even come with Nvidia 12 pin cables which is strange for a 2021 revision.

It arrived today, cables were in fabric bag

They are as you say though flat and not individually sleeved. Looks like I need to order a set of their pro-replacement cables, joy.

Which I think are these;

https://www.corsair.com/uk/en/Categ...-PSU-Cables-Pro-Kit-Type-4-Gen-4/p/CP-8920224

Im going to wait to see which ones I need though as my case is massive and a lot of the stuff is going on in a compartment behind the MB tray so I might only actually need the MB cable and whatever goes to this new 3080TI I've got, although that has an NV extension cable that's black so that's going to look pants anyway (white case and Cables)

pastymuncher · 3 Nov 2021 at 09:33

@LOAM I am going to contact Corsair then and see if I can blag a fabric bag for the psu and cables. Did you get a 12 pin FE cable with yours? You could use extensions if you have the space to hide them which will work out much cheaper than a cable set.

LOAM · 3 Nov 2021 at 22:18

pastymuncher said:
@LOAM I am going to contact Corsair then and see if I can blag a fabric bag for the psu and cables. Did you get a 12 pin FE cable with yours? You could use extensions if you have the space to hide them which will work out much cheaper than a cable set.

There's a 12 pin cable that came with the GPU, is that what you mean?

pastymuncher · 4 Nov 2021 at 09:31

If it's the Nvidia 12 pin FE cable (2x 8 pin pci-e into a 12 pin) then yes. That's something else I didn't get. It is the 2021 RMx that you got?

LOAM · 4 Nov 2021 at 21:02

pastymuncher said:
If it's the Nvidia 12 pin FE cable (2x 8 pin pci-e into a 12 pin) then yes. That's something else I didn't get. It is the 2021 RMx that you got?

I guess as it only arrived on Monday but the cable came with the 3080TI FE I got last week.

pastymuncher · 5 Nov 2021 at 09:56

I contacted Corsair UK who very promptly got back to me with a nicely worded email and they are sorting me out with a fabric bag for the cables and PSU free of charge. Now that's what I call customer service.

LOAM · 5 Nov 2021 at 19:23

Cool