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CORSAIR RMx Series RM850X 850W 80 PLUS GOLD Haswell Ready Full Modular ATX12V; EPS12V SLI and Crossfire Ready Power Supply $79.99

$79.99
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Newegg has CORSAIR RM850X 850W Power Supply for 79.99 after coupon and mail-in-rebate. Cheaper than FP deal for similarly specced EVGA SuperNova 850W G2 (same cost as GQ model, but GQ isn't fully modular), although requires MIR.
Use coupon code UVXCE10 to take $10 off.

https://www.newegg.com/Product/Pr...6817139141

Review from JonnyGuru rates the RMx series as 10/10 (for RM1000X) and 9.8 (for RM750X).
http://www.jonnyguru.com/modules....y&reid=452
The review isn't for RM850X model, but I suspect the build should be somewhat similar to RM750X, and considering both 750W and 1000W model earned over 9.0 score, I would say RM850X should also be pretty good.
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#2
It's Haswell ready guys - get it while it's hot!
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#3
This vs EVGA G2 850??
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#4
Quote from Geronemo3
:
This vs EVGA G2 850??
They're both very good power supplies. Very similar in specs (if not same pretty much), even down to the connectors and cables. From what I read, the major difference is the noise level. G2 seems to be a bit louder than RMx, and while both series offers semi-fanless mode (where fan stops running if temperature/load is low), G2 tends to start spinning the fan at a lower load than RMx does. Aside from noise, both are very good PSU, and are both made by reputable manufacturers. Both offer a 10-year warranty.
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#5
MasterPass discount with this deal?
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Quote from arinbell
:
They're both very good power supplies. Very similar in specs (if not same pretty much), even down to the connectors and cables. From what I read, the major difference is the noise level. G2 seems to be a bit louder than RMx, and while both series offers semi-fanless mode (where fan stops running if temperature/load is low), G2 tends to start spinning the fan at a lower load than RMx does. Aside from noise, both are very good PSU, and are both made by reputable manufacturers. Both offer a 10-year warranty.
Thanks a bunch.
I was looking at seasonic focus plus 850W, but missed that deal. These seems to be bigger in length slightly.

I've used the EVGA GS 550 and it's extremely quiet. Would u say RMx and G2 is at same level, louder or even quieter?

Thanks
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Quote from Geronemo3
:
Thanks a bunch.
I was looking at seasonic focus plus 850W, but missed that deal. These seems to be bigger in length slightly.

I've used the EVGA GS 550 and it's extremely quiet. Would u say RMx and G2 is at same level, louder or even quieter?

Thanks
From what I've read Corsair's RMx series are some of the quietest power supplies on the market. It really depends on load though - most power supplies are quiet up to about 40-50% load and then the fan ramps up quickly. These stay quiet all the way to 100% load.
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#8
This is solid power supply. Connectors are sufficiently long
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#9
Quote from Geronemo3
:
Thanks a bunch.
I was looking at seasonic focus plus 850W, but missed that deal. These seems to be bigger in length slightly.

I've used the EVGA GS 550 and it's extremely quiet. Would u say RMx and G2 is at same level, louder or even quieter?

Thanks
Quote from Nimbulan
:
From what I've read Corsair's RMx series are some of the quietest power supplies on the market. It really depends on load though - most power supplies are quiet up to about 40-50% load and then the fan ramps up quickly. These stay quiet all the way to 100% load.
You're right. If you look at Corsair's manual, they state the noise level from maximum fan speed to be at about 21db for RM850X, and EVGA lists theirs at 31~34db at maximum fan speed. The main factor when it comes to fan noise seems to be the grille design. From what I read in JonnyGuru's reviews, it seems grille design with metal spokes like the RMx series tend to have lower noise than the metal punch out design like the SuperNova G2 series.
I believe neither of them will hardly be louder than other components in the computer, but when compared in a vacuum, I think RMx is quieter than G2.

(Corsair RMx series manual)
http://www.corsair.com/~/media/co...manual.pdf

(EVGA 850 G2 Newegg product page, fan noise level graph is in overview tab)
https://www.newegg.com/Product/Pr...6817438018

Edit: sorry, I didn't see that you wanted a comparison between RMx, G2, and GS series. From what I could find on the fan noise curve on each of these series (all shown by manufacturers themselves), both G2 850 and GS 550 shows about 31 to 35db on 100 percent load, while RM850X shows about 21db at 100 percent load.
But realistically you'd never run your computer at 100 percent, so if you're only running it at around 80 percent load, the noise level for GS 550 is about 16db, G2 850 is about 23db, and RM850X is about 15db.
All 3 PSU provides semi-fanless mode, and looking at which load they begin spinning their fan, it seems GS 550 starts at around 25 percent load, G2 850 starts at around 20 percent load, and RM850X starts at around 40 percent load. But do remember that this depends on the ambient air temperature too as most of PSUs with semi-fanless mode relies on temperature to begin spinning the fan instead of the power load. If your room is hot, the fan would likely start spinning at lower loads than above numbers.
I got the noise graphs from links above, and for GS 550, it's below.

https://www.evga.com/products/pro...GS-0550-V1
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Last edited by arinbell November 26, 2017 at 02:45 PM.
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Quote from arinbell
:
You're right. If you look at Corsair's manual, they state the noise level from maximum fan speed to be at about 21db for RM850X, and EVGA lists theirs at 31~34db at maximum fan speed. The main factor when it comes to fan noise seems to be the grille design. From what I read in JonnyGuru's reviews, it seems grille design with metal spokes like the RMx series tend to have lower noise than the metal punch out design like the SuperNova G2 series.
I believe neither of them will hardly be louder than other components in the computer, but when compared in a vacuum, I think RMx is quieter than G2.

(Corsair RMx series manual)
http://www.corsair.com/~/media/co...manual.pdf

(EVGA 850 G2 Newegg product page, fan noise level graph is in overview tab)
https://www.newegg.com/Product/Pr...6817438018

Edit: sorry, I didn't see that you wanted a comparison between RMx, G2, and GS series. From what I could find on the fan noise curve on each of these series (all shown by manufacturers themselves), both G2 850 and GS 550 shows about 31 to 35db on 100 percent load, while RM850X shows about 21db at 100 percent load.
But realistically you'd never run your computer at 100 percent, so if you're only running it at around 80 percent load, the noise level for GS 550 is about 16db, G2 850 is about 23db, and RM850X is about 15db.
All 3 PSU provides semi-fanless mode, and looking at which load they begin spinning their fan, it seems GS 550 starts at around 25 percent load, G2 850 starts at around 20 percent load, and RM850X starts at around 40 percent load. But do remember that this depends on the ambient air temperature too as most of PSUs with semi-fanless mode relies on temperature to begin spinning the fan instead of the power load. If your room is hot, the fan would likely start spinning at lower loads than above numbers.
I got the noise graphs from links above, and for GS 550, it's below.

https://www.evga.com/products/pro...GS-0550-V1
Thanks for the reply.

What do you think about EVGA G3 750W about noise. I know the seasonic focus is also around 21db.


Thanks.
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#11
i have this supply and it definitely is one of the quietest supplies ive owned
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Quote from Geronemo3
:
Thanks for the reply.

What do you think about EVGA G3 750W about noise. I know the seasonic focus is also around 21db.


Thanks.
G3 750 seems to go about 25db at max, 15~20db at mid to 80 percent load. So it's much better than G2 850 in terms of acoustics and even better than GS 550 at full load. Tad bit louder than RM850X though.
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#13
I bought the RM750x then noticed that this was the same price. Was able to return the 750 since I hadn't opened it. No brainer if you want a silent psu with lots of load capability.
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#14
Is this deal still live? Where can I go for the rebate?
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