Corsair CX750M no longer great.. need recommendation

Nichrome

Nichrome

Nichrome

Associate
Joined
27 Oct 2014
Posts
197
Location
UK, Bristol
Hi all,

My 3 year old Corsair CX750M shows its age (or low quality?).
It screams when I overclock my i7 6700K to 4.8GHz or higher. And I mean it: screams. Just coil whine is on stock clocks...
5GHz is not possible because of this power supply.
I also get coil whine (coming from the power supply, not the GPU) since I got MSI GTX1070 Gaming 8G. It did also occur when I had GTX980 and GTX980Ti. Whether I use a single modular PCIe cable to connect 1x8 and 1x6 pin, or if 2 separate PCIe cables for 1x8 and 1x6, I get same whine from the PSU.
Running benchmarks that stress GPU to 70%+ and CPU to 60%+ load, PSU sounds like it will explode any second :eek:

I am looking for a Gold/Platinum rated power supply. Something sufficient to power:
1x CPU
1x GPU (always 1xGPU, never multi!)
2x HDDs and 4x SSDs (SATA)
1x Fan controller [molex] (6 fans) +3 fans connected to motherboard headers (all use 3pin headers)
1x watercooling pump (fan header)
1x custom LED strip [molex]
If Overclockers would sell nuclear power plant, I'd be buying one straight away :cool:

I assume that 600W would be sufficient.
Also I looked at Super Flower, Corsair, Seasonic and Silverstone.
I would like to avoid any other brand.
Budget: about 100-120GBP.
And full modularity is a must.
PS: I do not need a 2kW Super Flower from 8Pack :p 600-800W will do the job.

What are your suggestions?
 
I see that EVGA is quite popular PSU.
I think I will go with SuperFlower or EVGA, but that has to wait until Christmas :)

Thanks for your input!
 
I had Antec PSU (500W) in my other (very basic: G3258, 750Ti, 16GB RAM) system. I had it maybe, 2 years, and it basically stopped working all of sudden, putting my system into restart loop. As soon as I connected my current CX750M, it started straight away. ((No offence, but the only Antec product I'd ever consider to buy would be the Antec 1900 case)).



So yes, there is a reason why I want to avoid any other brands really. I also looked at reviews (OC3D, KitGuru, JayzTwoCents, LinusTechTips and Tom's Hardware) but also my friends' opinions. None of friends mentioned Antec, XFX or EVGA really. All were Seasonic, Corsair and those living in the UK, SuperFlower.

I just ordered this one:
https://www.overclockers.co.uk/supe...platinum-power-supply-gunmetal-ca-049-sf.html

On sale (10 quid off, always a bit :) ). And Gunmetal has plain black cables (unlike "black" version with "colour coded" cables).

I could not wait really until Christmas.. My PSU started to cause restarts (quite randomly) in games (heavy ones). Tested with friend's AX1500i, system runs perfectly fine. GPU and CPU are overclocked, so in this case, a strong PSU is a must.
I will drop this Corsair into my basic system(I suppose it will last for a while in a low-end PC), and use SF in my gaming one.

Ideally I would like to buy a Seasonic unit (I think it's called Snow Silent?) but a bit too expensive for student's pocket :( And too expensive compared to any other PSU of similar spec (750W, platinum rating).

EDIT:
Just to add to that:
why the hell a braided cable kit is half price of my ordered PSU?! I wouldn't mind paying 60quid for a set if my PSU would cost 500GBP, but on the other hand, such expensive PSU could come with a sexy braided kit already.. wow.. Guess I know what I'll buy myself for Christmas: DIY sleeving kit..
 
Last edited:
pastymuncher said:
Why on earth did you order a 850w psu? Apart from the price premium you will never even get near half the available power.
Click to expand...

That was one of your recommendations:
https://www.overclockers.co.uk/evga...-platinum-modular-power-supply-ca-027-ea.html (priced at 122).

I bought more powerful (850W) for only 10 quid more.
I have not yet finished with my build really. I have yet to add 4 more fans(another radiator 240mm = 2x120mm for push and 2x120mm pull) and thinking about changing the case so I can fit more than 2x 3.5" HDDs.

I am already using 6 SATA cables (out of 8 from my current PSU), and 2 molex connectors out of 4 (I think).
PCIe connectors: true, I will not use all of them. But rather be safe on that side. I never know when I'll grab GPU that would use all of them (does such exist yet?) :p And maybe will SLI one day or another, but not at this moment.

So yeah... I know what I'm doing :)
 
Well, most importantly: the noise gone away!
No coil whine from CPU, PSU or GPU. In fact, GPU whines a little when I go over 300FPS when disabling VSync (PayDay 2 for example). But under full load of CPU and GPU, it is very quiet.
PSU dead silent. It's decent one for sure, and no longer afraid of frying up my CPU or GPU.
I like the fact that one of the cables has 2xMolex and 2xSATA. This way, I didn't have to use separate SATA for 2 more drives and separate molex for LED strip and fan controller.

But I have 2 things to add about it:
1. In my case there is a "special" holder that is removable to keep the PSU in place. By any means, there is no way I can mount it properly (although PSU sits perfectly fine just on 4 screws attached to the case).
2. Plugging the cables into the PSU was quite hard. Felt like the ports in the PSU were not big enough.. Probably because PSU is brand new.

Thanks for advise ;)

And great service from OCers as always!
 
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