Is corsair cx750m good enough to run a r9 390 GPU?

chrisp99

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Nov 24, 2015
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Hi guys i was wondering if my corsiar cx750m power supply good anough to run a r9 390 and amd fx 6300 cpu? Im planning on getting a new graphics card for xmas but i. Curious if my psu will power the r9 390
 


It is not crap but not great, it is a budget unit that will last if not run at max capacity all the time, with a single 390 GPU it will never come close to that.
 


Here's a site to get a rough estimate: http://outervision.com/power-supply-calculator. 750w should be more than enough for your system with room for upgrades.
 


That's because the CX line is a budget line, and not really loved among the gamer/enthusiast crowd. So, people that are into gaming builds will tell you that, while the PSU has enough power to run your rig in theory, in practice it might die or fry. It may do you fine for years to come, it's just most of us won't strongly recommend the CXs.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=416

 
The biggest issue with the CX series it their use of Capxon secondary capacitors, they can't take the heat and higher loads so they have longevity issues. The CXs work good out of the box(why they reviewed well) its time that kills them. From what I have seen and experienced with them the have an avg life span of about a year. Longest I've seen one last was ~18 months shortest was about 2 weeks(refurb sent as a replacement). Here's what it it look like if one of the caps pop.
https://www.youtube.com/watch?v=kj8-wNmYJvM
 


Thayt is simply untrue there are people that have been using them for years on low loads!
 


I said from what I have seen and experienced with them, so how is that untrue?
 


I take that back based on that fact.
So out take of 2 units that you have personal experience with makes them last about a year on average! Free PSU for life then 3 year warranty.
As stated above it depends on the load put on them. If they newer push past 80% load they will not get hot enough to melt the 85C capacitors.
 
I used 5 of them in builds. 4 of them failed in the first year, the 2 where running systems using an igpu, so very low load. 2 were powering low-mid range gaming systems but still would have been only a little above 50% usage at full load. The 5th a cx 430 did last longer than a year because after the first 4 failed, it ended being used as a loner a dying later(on a system using the igpu). Replaced them all with 550w XFX units and they are still running. Have a friend who used a cx750m the first one managed to last about 18 months, it replacement lasted 2 month and the replacement for the replacement lasted 2 weeks. See several here every week fail aswell. The most common issue i see with them is shutting down under load. Also while the main cap is rated for 85°C the unit itself is only rated to run at 30­°C.
http://www.hardocp.com/article/2015/01/21/corsair_cx750_750w_power_supply_review#.VmBr1_kUVHZ
 
I used a CX 750 for almost 4 years without any shutdowns or failures. I originally used it on my first build before I knew better. The original build was an overclocked FX 6300 at 4.2GHz and a Radeon 7850.

I later replaced the 7850 with a GTX 970 and eventually replaced the FX 6300 with an i5-4690k and added in a second 970 in SLI.

Even with two 970s in SLI for about 8 months I never experienced any actual issues with my CX750.

I recently upgraded my power supply to a EVGA 850W G2 Supernova Gold Certified for a couple reasons. First, I got terrible coil whine on my 970s, especially in games where I can get really high framerates like CS:GO. The other reason was out of fear that I would fry my nice SLI build after constantly reading about how bad the CX power supplies are here.

I can't say for sure whether the CX power supply would have eventually died or fried my other components because neither of those things ever happened to me. I am happy to report that switching to the EVGA PSU completely eliminated my annoying coil whine problem though.
 


It depends on the rest of your system. For example if you perform overclocking, number of HD's, ssd's, pci-e's connected, etc. But speaking only of the video card, a Psu of 750 real would be yes. I recommend calculed by this site: http://outervision.com/power-supply-calculator


Good Luck!