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OCZ ZX 850W vs Corsair AX850?

post #1 of 14
Thread Starter 
So i got the ocz ZX for $86 bucks.... should I sell it and get the HX850 now @ $124.50?


OCZ: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011




*edit* how does it compare to the AX850?
Edited by exzacklyright - 11/3/11 at 11:06am
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post #2 of 14
I wouldn't. Aside of the lack of MOV (which isn't a big issue), the ZX is more modern and, IMO, better unit than the HX. The HX is an older, CWT DSG 850 unit while the ZX is based on newer the Great Wall platform that's used on the Sparkle Gold 1250.

The ZX

016.JPG

The HX

1816460.jpg

The HX peaks up to 70C against the 60C of ZX. The ZX has proper heatsinks unlike the HX. It's a solid unit that I'd prefer over it.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=238
Edited by Johnny Doe - 11/3/11 at 3:30am
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post #3 of 14
Thread Starter 
Thanks a lot!
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post #4 of 14
Quote:
Originally Posted by exzacklyright;15554344 
So i got the ocz ZX for $86 bucks.... should I sell it and get the HX850 now @ $124.50?


OCZ: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011

HX850: http://www.newegg.com/Product/Product.aspx?Item=N82E16817341044 ($124.50 w/ PROMO --> EMCJJKG23)

That would be a very poor exchange value wise.. the ZX is fully modular and offers slightly better efficiency than the HX.. the HX offers better regulation than the ZX, especially on the minor rails.
Even at similar prices I would go for the ZX as opposed to the HX.
post #5 of 14
Does it matter what the heatsinks look like if the cooling is sufficient? I don't think people have measured poor performance of the HX850 in high temperatures, and most people run such power supplies intaking cool air anyway. Surely it's not going to break down anytime soon under normal usage, or it wouldn't have the 7 year warranty?

HX850 has somewhat better performance (but worse efficiency, not fully modular, as stated above), but it's definitely not by an amount that's worth the price difference, yet alone replacing a perfectly good PSU.
post #6 of 14
Thread Starter 
Probably should of compared it to the AX850.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139015

How does it compare to that one? It would be like 75 dollars more expensive though.
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post #7 of 14
Quote:
Originally Posted by exzacklyright;15558226 
Probably should of compared it to the AX850.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139015

How does it compare to that one? It would be like 75 dollars more expensive though.

The AX850 is the best in its class... so definitely the reason for the extra 75 dollars.

But then again, if you got the ZX already why bother switching....put that 75 dollars towards something else.
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post #8 of 14
AX850 has more (all) modular cables, quieter operation, fanless mode, smaller size, higher efficiency, but slightly worse performance (a little worse minor rail voltage regulation, worse transient response) compared to HX850. They're not in different classes.

ZX850 is definitely not worth replacing unless yours has coil whine or something like that.
post #9 of 14
You don't want to run the SeaSonic fanless. Give this one a read;

http://www.jonnyguru.com/forums/showthread.php?t=8417

While the PSU fan barely makes noise (nothing hearable at all) at low loads, you have no reason to run it fanless.

Also, yes, heatsinks matter. Heat is a determinant factor with PSU performance/reliability. Units are rated to deliver their power at 40/50C. So with one doing it at 70C, and the other at 35C, you have a big difference there. Capacitors are rated at 85C or so, the whole unit's long-term performance/reliability depends on temps. It's an important factor just like the performance numbers you look at and not care how well a unit it cooled.
Edited by Johnny Doe - 11/3/11 at 5:04pm
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post #10 of 14
Yes temperatures matter. A combination of heatsinks, airflow, placement of components, power consumption of various components (lower for higher efficiency obviously), and so on, will dictate temperatures. Then different components will react to different temperature levels. Yeah I'd rather see larger heatsinks than smaller ones, all else equal.

I just think it's a little over the top to be playing PSU backseat designer, with regards to heatsink sizes on units that are obviously not low end and scrapping to meet a budget, unless you think you know more than the actual designer. If reliability was impacted that much by having such small heatsinks, why would the warranty be 7 years? Surely they'd spend a little extra to make the heatsinks larger if it were necessary to prevent having significant numbers of RMAs before 6 years is up?
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