Gtx 1070 Ti + Ryzen 7 2700x with CX550M PSU?

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ekcwoodrow

Jul 22, 2018
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I'm building my first pc at this moment. Already purchased all my components. I just wanted to know before I do anything with the computer. Will my CX550M (550w, 80+ bronze) PSU be good enough for a GTX 1070 Ti and a Ryzen 7 2700X???

Since this is my first build I'm not planning on overclocking any component.

I've tried both PCpartpicker and cooler masters PSU calculators. PCPP calculator listed my wattage as 396w and CM calculator listed 453w (with 100% CPU utilization). Will the one I have be enough? I don't want to go through the hassle of exchanging it.

I read a lot about how people over-exaggerate the wattage on their PSU's. F. ex. Jayztwocents said in a video that generally with only a one video card setup you'll only need 500w PSU maximum. (effective one).

Grateful for any help that I can get since this is my first time.
 
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I am sure it can "handle it"
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Than why recommend more? There are zero benefits. "Quieter, efficient, better quality, future upgrades" are BS myths. You'll only end up wasting money, or choosing a worse quality power supply. The 550W PSU will be enough for pretty much any single-GPU system, with some overclocking.

but if you plan to game, more is always better
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That doesn't make sense. At all.
Op's system would consume ~270w while gaming. And again, more does not mean better.
By wasting time finding a higher wattage PSU, you can end up choosing a worse quality unit, like OP is already considering,
If I was to replace it, do you reckon that the EVGA supernova nex650g (80+ gold) PSU is a good replacement?
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ekcwoodrow

Jul 22, 2018
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Already screwed the PSU into the case. I haven't connected anything so I can easily repackage it and exchange. But if there is no need for it I don't want to bother with it

If I was to replace it, do you reckon that the EVGA supernova nex650g (80+ gold) PSU is a good replacement?
 
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Rexper

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Apr 12, 2017
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I am sure it can "handle it"
Click to expand...
Than why recommend more? There are zero benefits. "Quieter, efficient, better quality, future upgrades" are BS myths. You'll only end up wasting money, or choosing a worse quality power supply. The 550W PSU will be enough for pretty much any single-GPU system, with some overclocking.

but if you plan to game, more is always better
Click to expand...
That doesn't make sense. At all.
Op's system would consume ~270w while gaming. And again, more does not mean better.
By wasting time finding a higher wattage PSU, you can end up choosing a worse quality unit, like OP is already considering,
If I was to replace it, do you reckon that the EVGA supernova nex650g (80+ gold) PSU is a good replacement?
Click to expand...
No. It is worse than the Corsair CX550M.
Your current power supply is fine. Good quality and more than enough wattage. Your system would still be okay on a good 450w power supply.
 
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ekcwoodrow

Jul 22, 2018
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Cheers for the answer! I figured that the first guy is one of those who extremely over-exaggerate their PSU wattage. Just wanted to be sure since I was a bit insecure.
 
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jankerson

jankerson

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Well I don't recommend budget PSU's for higher end gaming systems generally, the CX550M is a budget PSU.

As far as what Jay said, that's for views on his channel, Jay's smart enough that he isn't running a 500W PSU in his own machine however. These guys say things like that so they don't turn away a percentage of their viewers like the budget viewers (And they have sponsors to think about too), but in practice (real world) they aren't doing what they said.

As far as your CX550M goes it should be fine for awhile, but I would replace it with something higher end like the following if you start having issues or it starts to get loud. The newer CXM's haven't been around long enough yet to actually have confidence in stability over time. Time will tell if they are actually better than the old models or not.

Seasonic Focus Plus
EVGA G2 or G3
Corsair RMX

And I would go with a 650W PSU over a 550W.

Some people like to experiment with other peoples money and systems, I don't do that when recommending hardware.

 
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ekcwoodrow

Jul 22, 2018
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I'm gonna stick with it for now. Seen people run a cx450 on a 1080 so I'm not to worried. Will however replace it if something doesn't seem right with it.
 
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jankerson

jankerson

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I seriously doubt it as it doesn't have the PCIe connections for a GTX 1080 they need 2x 8pin.

The CX450 has one.
 
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ekcwoodrow

Jul 22, 2018
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I misspoke. Had my mind stuck on CX so I wrote wrong. I mean’t that I’ve seen people have 450w PSU’s on a 1080. Didn’t mean the cx450 specifically. Sorry!:)
 
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jankerson

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I doubt it as almost NONE have the proper PCIe connections for the GTX 1080.

And you can count the ones worth buying on one hand and still have a lot of fingers left over, but those aren't budget units.
 
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ekcwoodrow

Jul 22, 2018
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UPDATE!!

I got a bit worried after I read a bit more on the CX550M. I replaced it and spent the extra 55 bucks in difference(Australian dollars. About 40 USD) on the SeaSonic G-650W.

Was initially going to stick with the CX but read about how the fan in it is sleeve-bearing, leading to a shorter lifespan and overall worse quality. Felt like the PSU was something I should go budget on and instead spend a bit more for the better quality.

Feels good now. Heard some amazing stuff about SeaSonics PSU's so I feel safe.
 
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superninja12

superninja12

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@http://www2.seasonic.com/product/focus-450-gold/
a 450w unit with proper connections.

Last I want to point out to op , don´t be afraid to ask help and rexper was right ± https://www.anandtech.com/show/12625/amd-second-generation-ryzen-7-2700x-2700-ryzen-5-2600x-2600/8

105w for the cpu

https://www.tomshardware.com/reviews/nvidia-geforce-gtx-1070-ti-8gb,5311-16.html

180 w for the gpu

thats 285w, lets add some ,hard drives ,ram, fans, other stuff. 100w? and thats way too much.

ridiculous, to buy a new psu.


 
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jankerson

jankerson

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550W was fine, it was more about the quality of the PSU in the higher end system that I questioned.

The CX's really aren't that great, even the new ones. A TXM or better yet a RMX would be much better.


Maybe for a budget system they are OK, but for higher end machines it would be better to get with a better quality unit.


The Focus 450W only has one PCIe cable, daisy chained 2 connections.

Here is what Seasonic says about that.

pcie-installation1.jpg


The Seasonic G-450W is the only 450W PSU that I can think of that actually has 2 PCIe cables.

https://seasonic.com/g-series



 
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jankerson

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The 650W is a different platform than the 550W.

The CX650M is OK, not so much for the CX550M and below. (The 650W and above are the old RM Platform)

Then there is that review where the CX550M failed.....

https://www.hardwareinsights.com/corsair-cx550m-farewell-group-design/7/#Conclusion-and-evaluation

 
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jankerson

jankerson

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Yeah, they can have it as far as I am concerned.

I will never use one in any of my systems.
 
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ekcwoodrow

Jul 22, 2018
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Wasn't about the 550 watt really. Just felt like I would make the upgrade to a better quality PSU in SeaSonic. The g-550 was out of stock so I got the 650w instead.
 
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