Why is the Corsair CX 750 bad?

[nimonster]

I actually bought the CX750 because I thought it was a good price ($57). At the time I thought power was power and it is all the same but after reading here I found that people say it is not good for overclocking. I haven't used it yet as I haven't ordered any other parts but is it really that bad?

I am planning on this build: http://pcpartpicker.com/p/CLDMyc and I do want to do some overclocking but not like open loop water cooling super overclocking, maybe with a closed loop water cooling.

Do you think it is worth the 15% restocking fee to return it and get a better one?

 

[Richard Ricardo]

The CX uses cheap capacitors and people seem to dislike that. I personally don't know what that means but you should be fine I guess.

 

[Alex Kelly]

Yes, I think it'd be worth it for a high end build like that.
They aren't the best option because bad voltage regulation, ripple suppression and coil whine issues are common. The fan also gets pretty loud and yeah, it's just not a great PSU.
Also uses cheap parts as mentioned above.
Good options are EVGA B2/G2, XFX or Seasonic PSUs.
If you haven't ordered your GPU yet, I'd suggest not going for the EVGA model as it's the loudest and hottest 970 out.
ASUS & MSI make the best cards.

 

[rolli59]

The bad capacitors are lower temp units that tend to fail when stressed. One of the reasons CX series has shorter warranty than their higher class units. Looking at your build the PSU will be running about half the max rating so you should be fine.

 

[i7Baby]

Your build is high end. You should have a high end PSU.

I gather you want 750W with a view to getting a 2nd 970 down the track. I'd recommend EVGA Supernova 750 gold - $115 Newegg

PSU rankings - http://www.tomshardware.com/forum/id-1804779/power-supply-unit-tier-list.html

CX - Tier 3 - not ideal for serious overclocking

Supernova - Tier 1 - Highly recommended for any situation

You can Google reviews on them.

http://www.jonnyguru.com/modules.php?name=NDReviews&file=print&reid=380

 

[nimonster]

Hmm. Anything below around $80 dollars? I actually got this for $57. I do want to sli in the far future and add more ram and closed loop cooling and another hdd so that's why i chose 750 although 650 might work too.

What does it mean by not for serious overclocking? What would happen if i did?

 

[i7Baby]

If you want to go 970s in SLI, you'll need 750W

There's the supernova for $155
or the Seasonic M12II 750 for $95
or the Antec HCG 750M for $110
or the XFX750 for $90

Under $80 and you're looking at a crap PSU - suitable for a crap build.

 

[guanyu210379]

Choosing PSU, you must keep several things in consideration like:
OC, usage time per day, expected live span, price, etc.
CX750 is still better than cheaper crappy low-classed PSUs but not yet good for a PSU to be used in high-end rig.
You spent quite a lot for the rig and you would want the rig to run stable for quite a long time, and therefore you would want a good quality PSU.
I would not hold back because of only extra USD50 for the PSU.

 

[coolcole01]

it will be fine just dont expect a long life from it that said a psu is the building block of the pc

 

[guanyu210379]

"...dont expect a long life from it..."
this ^ is why you should not buy bad PSUs.

It is your choice.

 

[rolli59]

Hmm. Anything below around $80 dollars? I actually got this for $57. I do want to sli in the far future and add more ram and closed loop cooling and another hdd so that's why i chose 750 although 650 might work too.

What does it mean by not for serious overclocking? What would happen if i did?

XFX 750 $75 after MIR http://pcpartpicker.com/part/xfx-power-supply-p1750snlb9 Or Rosewill Capstone 750 gold rated $80 http://pcpartpicker.com/part/rosewill-power-supply-capstone750