Corsair RM___x or Seasonic PRIME

[wittydavid]

After searching online and reading recommendations here I narrowed it down to 3 high quality (I hope) PSUs series -

• Corsair RM___x series
• Seasonic PRIME
• Seasonic PRIME Ultra

I keep seeing these as the most recommended and I have a few questions (sorry if they're a little dumb)-

1. For some reason I keep seeing Corsair RM750x and no the other watt variants. Are the 650 and 550 variants have the same build quality? or is it possible that with high watts comes better build quality.
2. What's the difference between Seasonic PRIME and the Seasonic PRIME Ultra? (Couldn't find anything aside from the fact that the Ultra is a newer series)
3. Which PSU of the three should I go for?
4. Should I go for 550 or 650 watt?

Here is my new setup -

PCPartPicker Part List

Type	Item	Price
CPU	AMD Ryzen 9 3900X 3.8 GHz 12-Core Processor	$499.99 @ Best Buy
CPU Cooler	Noctua NH-D15 82.5 CFM CPU Cooler	$89.95 @ Amazon
Motherboard	Asus TUF GAMING X570-PLUS ATX AM4 Motherboard	$168.98 @ Newegg
Memory	Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 Memory	$79.98 @ Amazon
Storage	Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive	$109.00 @ Adorama
Storage	Seagate BarraCuda 1 TB 3.5" 7200RPM Internal Hard Drive	$42.24 @ Walmart
Video Card	Asus GeForce RTX 2080 SUPER 8 GB STRIX GAMING Advanced Video Card	$784.99 @ Best Buy
Case	Fractal Design Meshify C ATX Mid Tower Case	$98.98 @ Newegg
Case Fan	Noctua NF-S12B redux-1200 PWM 59.1 CFM 120 mm Fan	$13.95 @ Amazon
	Prices include shipping, taxes, rebates, and discounts
	Total	$1888.06
	Generated by PCPartPicker 2019-12-08 18:16 EST-0500

 

Much appreciation !!!

 

[Praesi]

I use RMi which is very similar to RMx and its very good.

The Build Quality is the same, no matter the watt.

[Statik]

In the RMx series, if they're all 80+ gold there should be no difference in build quality. I would not get a 550W for a 2080S and 3900x. I like to air on the side of caution and got a RMx850 for my 3800x and 2080s. I would recommend a 650W minimum. 

[Praesi]

The RMi and RMx Series stay silent until the PSU reach 50% usage. So you  maybe want keep that in mind for choosing the watt.

[Guest]

2 hours ago, wittydavid said:

1. For some reason I keep seeing Corsair RM750x and no the other watt variants. Are the 650 and 550 variants have the same build quality? or is it possible that with high watts comes better build quality?

 

You mean you can't find RM650x product or you can't find RM650x reviews?

 

https://www.tomshardware.com/reviews/corsair-rm650x-psu,4611.html

 

[wittydavid]

19 hours ago, Statik said:

In the RMx series, if they're all 80+ gold there should be no difference in build quality. I would not get a 550W for a 2080S and 3900x. I like to air on the side of caution and got a RMx850 for my 3800x and 2080s. I would recommend a 650W minimum. 

According to what I saw online and checking watt calculators it seems that 650 is more than enough.
550 Should also be good but like you said I'd rather be safe than sorry.

Thanks for your reply!

[wittydavid]

17 hours ago, jonnyGURU said:

You mean you can't find RM650x product or you can't find RM650x reviews?

 

https://www.tomshardware.com/reviews/corsair-rm650x-psu,4611.html

 

No exactly what I meant.
There were multiple articles that mentioned the rm750x as a unit and not as a part of a series if you understand what I'm saying.

For example this article https://www.techradar.com/news/best-pc-power-supply 

mentions the rm750x as the best psu all around and if that's the case I'd assume that all other psus from the rmx series are the best in every watt level the rmx is supoprting.

Does that make sense? or did I confuse you?

[wittydavid]

19 hours ago, Praesi said:

The RMi and RMx Series stay silent until the PSU reach 50% usage. So you  maybe want keep that in mind for choosing the watt.

Hmm I guess that It's worth the extra 20 bucks.

Thanks!

[Guest]

7 hours ago, wittydavid said:

No exactly what I meant.
There were multiple articles that mentioned the rm750x as a unit and not as a part of a series if you understand what I'm saying.

For example this article https://www.techradar.com/news/best-pc-power-supply 

mentions the rm750x as the best psu all around and if that's the case I'd assume that all other psus from the rmx series are the best in every watt level the rmx is supoprting.

Does that make sense? or did I confuse you?

TechRadar doesn't review power supplies.  That article is useless.  Look for actual PSU reviews like Tom's Hardware, TechPowerUp, etc.

 

[wittydavid]

7 hours ago, jonnyGURU said:

TechRadar doesn't review power supplies.  That article is useless.  Look for actual PSU reviews like Tom's Hardware, TechPowerUp, etc.

 

Will do!

Thanks!