new PSU rm high watt vs rmx low watt ?

[Sil3ntDragon]

Hi

I'm looking at three PSU's from the same vendor I'm fairly sure I won't need more than 550w for my system as it is running fine on a 550w psu I'm borrowing atm.

However I've seen three psu's at roughly the same price. These three:
Corsair RM550X V2 550W cost in USD 128.5

Corsair RM750 V2 750W  cost in USD 134

Corsair rm650 V2 650w the cheapest cost in USD 119

as you can see the 750W doesn't have the X in the end but they are price almost the same. My question here is. which would be better to get ?

in case you are wondering for what system I'm going to use it for here is the specs:

Asus TUF B450 motherboard
AMD 3400G CPU
16GB ram
1TB intel 660p SSD.

2 other HDD's
a cheap Corsair AIO 120mm

4 case fans

3 lights strips and lights in 3 case fans.
quite a few USB disk and peripherals.
only build in GFX card.

as you can see a pretty basic system.

[Oswin]

any prices on a TX550M? the RM550x is perfectly adequate and is the best out of the two

[LienusLateTips]

Get the RM550x, the RM 2019 has a much worse fans (same one that Seasonic uses standard!).

[boggy77]

rmx550 is the best of those, but if you can find the txm for cheaper, that will do as well.

[Sil3ntDragon]

3 minutes ago, Oswin said:

any prices on a TX550M? the RM550x is perfectly adequate and is the best out of the two

in my country the TX or HX. etx goes way beyond my budget for this.
the price difference between the RM550X and the others I've updated my original post with

 

[Oswin]

1 minute ago, Sil3ntDragon said:

in my country the TX or HX. etx goes way beyond my budget for this.
the price difference between the RM550X and the others I've updated my original post with

 

i see, then go with the RM550x.

[LienusLateTips]

5 minutes ago, Sil3ntDragon said:

in my country the TX or HX. etx goes way beyond my budget for this.
the price difference between the RM550X and the others I've updated my original post with

 

is there be quiet straight power 11 or super flower leadex ii gold?

[Sil3ntDragon]

1 minute ago, LienusLateTips said:

is there be quiet straight power 11 or super flower leadex ii gold?

there is a be quiet straight power 11 cm 550w at roughly the same price 131 USD

[MrBrightSyde]

20 minutes ago, Sil3ntDragon said:

there is a be quiet straight power 11 cm 550w at roughly the same price 131 USD

Hmm, 3 USD more for a PSU that's multi-rail, but only a 5 year warranty compared to the 10 year from Corsair. I would say go for the RMx if you value the warranty at all, but other than that, both are good choices.

[Sil3ntDragon]

5 hours ago, MrBrightSyde said:

Hmm, 3 USD more for a PSU that's multi-rail, but only a 5 year warranty compared to the 10 year from Corsair. I would say go for the RMx if you value the warranty at all, but other than that, both are good choices.

just curious I know what single rail and multi-rail means but beyond having to take care with how you load a multi-rail psu I've never understood if there is any consumer beneficial difference between the two. it seems to me that any good quality PSU doesn't matter if it is multi rail or single rail, I do tend to prefer single rail as I've had a few mishaps with loading a few multi-rail too unbalanced.   

[Guest]

7 hours ago, LienusLateTips said:

Get the RM550x, the RM 2019 has a much worse fans (same one that Seasonic uses standard!).

Incorrect!

 

Maybe when you get bored with PSUs you can move to the next level and start dissecting PSU fans.

 

Sometimes the same label is used on the fan so the same safety certifications can be leveraged, but it doesn't mean the fan is the same inside.  That's why we see so many rifle bearing and FDB fans labeled as "sleeve".

 

Example:  Corsair ALWAYS uses this IC in any of the Hong Hua made fans:  https://www.melexis.com/en/product/MLX90287/12V-PWM-Single-Coil-Fan-Driver

 

But Seasonic, etc. does not because it's a (gasp) cost adder (gasp)

 

I actually wish Aris would tear into the PSU fans for each PSU he reviews.  I see him making the same mistakes himself.

 

 

[Guest]

1 hour ago, Sil3ntDragon said:

just curious I know what single rail and multi-rail means but beyond having to take care with how you load a multi-rail psu I've never understood if there is any consumer beneficial difference between the two. it seems to me that any good quality PSU doesn't matter if it is multi rail or single rail, I do tend to prefer single rail as I've had a few mishaps with loading a few multi-rail too unbalanced.   

If you are "balancing multi-rails" then you don't know what it means. 

 

There's only one benefit to the customer and that's as a safety in the even that OPP or SCP fails to catch a short circuit.

 

[Sil3ntDragon]

36 minutes ago, jonnyGURU said:

If you are "balancing multi-rails" then you don't know what it means. 

 

There's only one benefit to the customer and that's as a safety in the even that OPP or SCP fails to catch a short circuit.

 

well the only time I had multi rails was over 10 years ago back then I had to balance the rails but I failed to do so and ended up overloading a PSU rail with two GFX trying to draw each 300-400W in a 4 rail system I accidentally put all that load on one rail back then not knowing better. I don't know how they are today so if balancing is not an issue anymore then that is great.

Regarding the safety I've read several places now that there is no difference between a multi rail and single rail they might have different ways to handle them selves but they have build in protection from the same problems at least if you get a good enough quality psu. which is why I was asking here to get more knowledge about the ones I was looking at. 

[Guest]

3 minutes ago, Sil3ntDragon said:

well the only time I had multi rails was over 10 years ago back then I had to balance the rails but I failed to do so and ended up overloading a PSU rail with two GFX trying to draw each 300-400W in a 4 rail system I accidentally put all that load on one rail back then not knowing better.

So, pretty much the PC shut down when you fired up a game.

 

Yes.  That was a common issue when SLI and Crossfire first came out and it's why PCP&C came up with "single +12V rail" FUD and convinced everyone that it's better:  http://jongerow.com/PCPower.html

 

4 minutes ago, Sil3ntDragon said:

Regarding the safety I've read several places now that there is no difference between a multi rail and single rail they might have different ways to handle them selves but they have build in protection from the same problems at least if you get a good enough quality psu. which is why I was asking here to get more knowledge about the ones I was looking at. 

Then you have read incorrect information in several places.  While multiple +12V rails certainly isn't "necessary", it IS an added layer of protection.  There aren't other protections that replace it and there's no new technology that makes it obsolete, regardless of the level of quality of the PSU.

 

IMO:  It's not something that should sway someone's decision.  It's like having seat belts, airbags AND driver assist as opposed to just seat belts and airbags.

 

[LienusLateTips]

4 hours ago, jonnyGURU said:

Incorrect!

 

Maybe when you get bored with PSUs you can move to the next level and start dissecting PSU fans.

 

Sometimes the same label is used on the fan so the same safety certifications can be leveraged, but it doesn't mean the fan is the same inside.  That's why we see so many rifle bearing and FDB fans labeled as "sleeve".

 

Example:  Corsair ALWAYS uses this IC in any of the Hong Hua made fans:  https://www.melexis.com/en/product/MLX90287/12V-PWM-Single-Coil-Fan-Driver

 

But Seasonic, etc. does not because it's a (gasp) cost adder (gasp)

 

I actually wish Aris would tear into the PSU fans for each PSU he reviews.  I see him making the same mistakes himself.

 

 

Thanks! Nice to know, thanks for the correction.

 

(i've actually been tearing up a couple PSU and case fans recently haha too, but I don't have a couple RM PSUs laying around :P)