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Which One Coasair 850 or Rosewill 850??

Can almost guarantee that you'd get better customer support from Corsair. Every single power supply they've produced has gotten stellar reviews ... whereas Rosewill's have been mediocre at best. I'd go with the Corsair.
 
I know Cosair has a better name and would think the CS is better but after reading the reviews front to back I'm not sure thats what the review said..


Also what about the Ture Dual Rail...

Cosair is a Mono Rail
Rosewill is a Ture Dual >Quad Railed PSU

Whats advantage or a Dual rail other than every other PSU says it a Dual, Tripe or Quad

I'm looking for a PSU to use with the next gen video card's not one with the best RMA service..
They both have 3 year warranties..

EDIT:

I think I just made up my mind....
Cosair has a 5 year Warranty
Rosewill has 3 year.....

Also if I ever wanted to resell the Power Supply the Cosair name will sell and the Rosewill will be lost unless they make some kind of Band Name Break Out


Anyone have any links to articals on Dual Rail vs Single Rail????

EDIT:
Seems Dual Rail Power is Bad and really bad for OCing as one rail draws mure power than the other and causes problems from what I have found..


As everyone said the short vesrion "Just buy Cosair"
Thanks....................
 
Originally posted by: rarebear
I know Cosair has a better name and would think the CS is better but after reading the reviews front to back I'm not sure thats what the review said..
Click to expand...

I'd say the reviews show JUST that.

average efficiency of the Rosewill 80.8%
average efficiency of the Corsair 83.4%

Rosewill Voltage regulation
only 4% regulation on the 12V rails
3.6% on the 5V rail
4.8% on the 3.3V

Corsair voltage regulation
better than 1% on the 12V rail...that is amazing
2.2% on the 5V rail
2.4% on the 3.3V rail

Ripple Suppression
Rosewill 12V ripple 70mV at 840W...sorry can't tell about the 3.3V or 5V because that is an old review and the images were not moved to the new site
but the 12V rail is kind of noisy on the lower outputs as well

Corsair 12V ripple at ~60mV at 849W but at lower loads it stays very low under 30mV
3.3V and 5V ripple are under~25mV

Corsair is Independently regulated
Rosewill is group regulated
although to tell the truth, in a modern gaming rig this is rather irrelevant...but indy regulation is a more expensive design.

Also what about the Ture Dual Rail...

Cosair is a Mono Rail
Rosewill is a Ture Dual >Quad Railed PSU

Whats advantage or a Dual rail other than every other PSU says it a Dual, Tripe or Quad
Click to expand...

in this case pretty much irrelevant. However the Corsair can put out up to 840W on the 12V rail and the Rosewill can only do 768W

that isn't to say the Rosewill is bad, but the Corsair is better.

Anyone have any links to articals on Dual Rail vs Single Rail????
Click to expand...

look at the stickied thread at the top of this forum



 
HOOFan1,
I'm just a thick headed Hungarian..

I keep thinking Corsair deal is too good to be ture and thinking Rosewill might be better made and has No Name so its a better PSU and a little lower price.. Buts that all in my head I think...


I'm ordering my Cosair tomorrow..

After seeing your stats side by side its pretty clear the Corsair is the best buy, I should just jump on it and stop trying to find something better..

The Rosewill gets more points in LOOKS that the Corsair as I seen pointed out on another board 🙂

Thanks for taking the time...
 
Originally posted by: rarebear


Anyone have any links to articals on Dual Rail vs Single Rail????

EDIT:
Seems Dual Rail Power is Bad and really bad for OCing as one rail draws mure power than the other and causes problems from what I have found..
Click to expand...



Glad to see you decided on the Corsair, a much better built power supply.

But your comment about single rail is better than multi-rail power supplies, and that multi-rail power supplies are "really bad" is just plain wrong.

Read this thread by JonnyGuru, which is stickied at the top of this forum....

http://forums.anandtech.com/me...=2167846&enterthread=y
 
This is the reason I had read here and elsewhere why I used the word bad which is a bad chioce of words 🙂


The only "problem" the occurs with multiple +12V rails is that when a +12V rail is overloaded (for example: more than 20A is being demanded from a rail set to only deliver up to 20A), the PSU shuts down. Since there are no "limits" on single +12V rail PSU's, you can not overload the rails and cause them to shut down..... unless you're using a "too-small" PSU in the first place. Single +12V rails do not have better voltage regulation, do not have better ripple filtering, etc. unless the PSU is better to begin with.
Click to expand...


I read this issue on several first hand fourm accounts but maybe chalked up to it was a Bad PSU as Techs here state..

This is what made me think the Rosewill is a good PSU
I thought I read it has true dual rails split to quad...

These REAL multiple +12V rail units are very rare and are all 1000W+ units (Enermax Galaxy, Topower/Tagan "Dual Engine", Thermaltake Tough Power 1000W & 1200W, for example.)
Click to expand...

This is what made me think it was very good as I have not seen much on TURE Dual Rails only split rail power.. I guess I see the word "Rare" and my head swelled 🙂
Now, some multi 12V-rail units run multiple (usually two) transformers with the transformers tied back together on the 12V side so they're still a single rail with OCP into virtual rails. Still others actually leave the transformers separate and you have a true dual rail with OCP into a quad rail. Those are actually very rare. I've seen two different versions, the Tagan Turbo-Jet 900 and 1100 are that way (both based on the same PCB and built by Topower) and the Rosewill Xtreme 750W and 850W (there are two variants of both, one with a single 135mm fans and one with dual 80mm fans) but again, they're based on the same PCB and are built by ATNG.
Click to expand...
 
there is a reason they have the 12V rail shut off at a certain current on multi-rail PSUs...safety.

If you have a short circuit, the current will just keep increasing as will the heat and a fire could be started....that is if short circuit protection doesn't kick in.

So the 12V rail not shutting down might not always be a good thing. As long as the rails are aranged in a smart manner, there is no reason that a 20A limit should cause a problem on a well designed and quality PSU.
 
Originally posted by: rarebear
I keep thinking Corsair deal is too good to be ture e...
Click to expand...
Thanks for considering Corsair. We worked very hard to offer a rock solid 850w unit that would also sell at a very attractive price point.

 
Just ordered the CORSAIR 850TX 850W for $99.99 from Newegg after $25 Rebate and $15 Promo Code EMCLPML49

Was good deal and after everyone saying how good they are I feel pretty good 🙂

Now I just need to save for a second video card 🙂
 
Originally posted by: WaitingForNehalem
Why does Corsair insist on using CWT? Seasonic's produce much better voltage regulation.
Click to expand...

Corsair does use Seasonic, just not in this model.

HX520
HX620
TX650
HX1000

Are all Seasonic IIRC.

CX400
VX450
TX550
TX750
TX850

Those are CWT IIRC.

[Correct me If I'm wrong on any of that]

Also the newer CWT platforms are quite good too. Just not much is know about them.
 
Originally posted by: WaitingForNehalem
Why does Corsair insist on using CWT? Seasonic's produce much better voltage regulation.
Click to expand...

HAHA, you are so wrong....


From Oklahoma Wolf's review

Corsair TX850 Voltage Regulation
12V drop in Voltage was .08 volts...regulation of .6667%
5V drop in Voltage was .11 volts...regulation of 2.2%
3.3V drop in Voltatge was .08 volts..regulation of 2.4%

Seasonic M12D
12V drop in Voltage was .08 volts...regulation of .6667%
5V drop in Voltage was .14 volts...regulation of 2.8%
3.3V drop in Voltage was .09 volts...regulation of 2.7%

From Paul Johnson's review

Corsair TX850
12V drop in Voltage was ..16 volts...regulation of 1.3%
5V drop in Voltage was .07 volts...regulation of 1.4%
3.3V drop in Voltage was .06 volts...regulation of 1.8%

Seasonic M12D
12V drop in Voltage was .12 volts...regulation of 1%
5V drop in Voltage was .07 volts...regulation of 1.4%
3.3V drop in Voltage was .07 volts...regulation of 2.1%


Cost of the Corsair TX850 ~$140
Cost of Seasonic M12D ~$300

would you like to change your statement now?

Originally posted by: Quiksilver
Corsair does use Seasonic, just not in this model.
HX520
HX620

TX650
HX1000
Are all Seasonic IIRC.
CX400
VX450
TX550
TX750
TX850
Those are CWT IIRC.
[Correct me If I'm wrong on any of that]
Click to expand...

You are wrong too 😛

Seasonics are
CX400
VX450
HX450
HX520
HX620
TX650
CWTs are
VX550 PSH
TX750 PSH
TX850 PSH
HX1000 PUC
 
The DC Output Quality of the TX850W was in all ways in specification, but almost feels like it missed the boat in some regards. While Corsair was fixing up the whole PSH-850 failing issue, and reworking the secondary to take a solid capacitor on the 12v rail, they could or maybe should have fixed the DC output quality as well. However, they didn't and the TX850W gave us almost a carbon copy of the 12v rail performance of the Xigmatek NRP-MC851 which peaked at 90mV of ripple/noise. The minor rails of the TX850W were much better behaved and the antithesis of the other PSH-850 unit we recently saw as they peaked at just ~15mV of ripple/noise. So, the TX850W did pass our testing but as usual with PSH based units the 12v rail was noisy.
Click to expand...

By all of our metrics here today the TX850W was a good power supply. However, the CWT PSH platform that the TX850W is based on is seemingly getting a bit long in the tooth for enthusiast class products. Certainly when this platform first showed up about 2 years ago it was an excellent one that provided its advertised output at realistic operating temperatures stably and efficiently (exceptionally efficiently for the time) which put it leaps and bounds ahead of many units on the market at the time but it did have some drawbacks such as the noisy 12v output. Now while Corsair addressed the most obvious problem we have seen recently from 850w PSH units in the TX850W, the whole not working in specification thing at full load and bad 3.3v or 5v regulation, they seemingly missed one or two other points that could have given this unit a marquee point to stay in the high end of enthusiast units, DC output quality (the other being efficiency). This is odd to me since they were already reworking the secondary for the solid capacitor and fixing the minor rail voltage regulation issue, so why not fix the 12v ripple/noise levels as well? At any rate while the PSH platform has been passed up by many notable designs from Enermax, Andyson, Seasonic, and others, this unit is still a real killer in its new niche of high powered value. If Corsair can hit its $150 street price goal this unit will be a real competitor in this arena against units that are being flooded onto the market at clearance prices to end the year.
Click to expand...

http://enthusiast.hardocp.com/...w5LCxoZW50aHVzaWFzdA==

I'll keep my statement.
 
Originally posted by: WaitingForNehalem
Why does Corsair insist on using CWT? Seasonic's produce much better voltage regulation.
Click to expand...

That was your statement...and it was proven wrong.

Both Jonnyguru.com and HardOCP showed it to have just as good and sometimes better Voltage regulation than the Seasonic M12D 850W which costs more than twice as much

It would be correct to say Seasonic has better ripple suppression than the PSH (not CWT as a whole because the new DSR platform has equal ripple suppression to the Seasonic).

Besides that point...other than the M12D Seasonic does not have a platform capable of being rated at 850W at 50C. The M12D costs $300. The TX850 costs $140. Thus, using the Seasonic platform for this particular PSU would completely defeat Corsair's purpose of bringing an affordable 850W PSU with good performance to the market.

Despite what you quoted, Paul still gave the Corsair a Silver, because it performs very well and it is priced very well. As Jonnyguru has already told you, if everything is within spec, then there is no reason to keep complaining about it.
 
EDIT: I should read posts all the way😛
HOOfan 1 already mentioned which units are Seasonic and which are CWT.

HX1000 is made by CWT. (Review at JonnyGURU)
 
The only "problem" the occurs with multiple +12V rails is that when a +12V rail is overloaded (for example: more than 20A is being demanded from a rail set to only deliver up to 20A), the PSU shuts down. Since there are no "limits" on single +12V rail PSU's, you can not overload the rails and cause them to shut down..... unless you're using a "too-small" PSU in the first place. Single +12V rails do not have better voltage regulation, do not have better ripple filtering, etc. unless the PSU is better to begin with.
Click to expand...

That would only happen if:
- PSU was faulty
- PSU was not designed right
- User used too many adapters off one cable

The actual "reason" that there is an issue at all with the whole multi-rail versus single-rail was from two things. First, some of the early multi-rail units just had bad designs that didn't split the rails sensibly. Second, PC Power & Cooling only had single rail units and used their brand awareness to propagate the "fact" (through a FAQ on their site) that single rail is better.

The "fact" is that it doesn't matter how many rails a PSU has, as long as there is enough power to go around and there is OCP to avoid fires from short circuits (as HOOfan 1 mentioned).
 
I have two Corsair PSUs for the two builds in my sig. I've had to RMA the VX450 but they sent back the replacement pretty quickly and without a fuss. Pretty damn good if you ask me.
 
Got mine today and just finished rewiring..

It has enough wires and plugs for two CPUs hehehe
Edit: execpt of course for the 24 pin plug

Modular would be a big improvement for V2.0
 
Originally posted by: rarebear
Got mine today and just finished rewiring..

It has enough wires and plugs for two CPUs hehehe
Edit: execpt of course for the 24 pin plug

Modular would be a big improvement for V2.0
Click to expand...

It may be coming, but the modular version will be much more expensive, and probably won't be built on the same platform.

Corsair reps have stated that the non-modular version are supposed to be the excellent performing, but affordable series with a 5 year warranty.

The next versions of HX will be modular, beyond excellent in performance and have a 7 year warrant, but will also carry a premium price tag.
 
I think a 1/2 Modular model would be just right..

8 Molex and 8 SATA connectors is a lot of connectors...
Then add and four 6/8 PCIs cables and there is a lot of wires to hide

I'd make modular
2 PCIs acbles
and one of each SATA and Molex cables



 
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