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750 watt PSU Good enough for Crossfire r9 280x?

Tags:
  • Power Supplies
  • Novatech
  • Components
  • Crossfire
  • Sapphire
  • Dual
  • Radeon
Last response: in Components
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August 5, 2014 10:42:54 AM

Will a Novatech 80+ 750W PSU Be good enough for an overclocked fx 6300 @4.6 Ghz (1.4v) and two Sapphire Radeon r9 280x dual-x OC's?

Motherboard - Asrock Fatal1ty 990FX Killer
RAM - 8Gb Crucial Ballistix Tactical Tracer @1600Mhz.

I believe it will be but I thought id check on here to hear other peoples opinions.

Thanks guys.

More about : 750 watt psu good crossfire 280x

a b ) Power supply
August 5, 2014 10:51:21 AM

It will cut it very, very close. That brand is also very bad quality.
Go with an EVGA Supernova G2 850, if you can afford to do so. :) 
If not, tell me your budget and location and I'll find you one.
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a b ) Power supply
August 5, 2014 10:57:55 AM

MeteorsRaining said:
Yeah that should suffice unless you're using FX-9 series CPU.

Btw I'll recommend you buy this PSU if you haven't bought it yet:

Power Supply: SeaSonic G-750 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($110.98 @ Newegg)


He has overclocked his processor. 750W will barely be enough, might actually shut down while gaming.
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a c 77 ) Power supply
August 5, 2014 11:02:05 AM

Oh I'm sorry, didn't read OC there, apologies. Get a 850W one, as Alex suggested, from either EVGA or Antec or SeaSonic.
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a b ) Power supply
August 5, 2014 11:12:53 AM

Scampi said:
For £64.99 i very much doubt that PSU outputs 'exactly' 750W on the 12v rails. Not even Seasonic can do that. One of these will be better & more reliable:

XFX XXX Ediiton 750W (£75): http://www.novatech.co.uk/products/components/powersupp...

EVGA Supernova G2 750W (£83): http://www.novatech.co.uk/products/components/powersupp...

Get the EVGA of the two, unless you want to save a few quid.


We have already concluded he will be much better off with an 850W unit.
And I already suggested the G2.
Thanks for your input though :) 
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a c 77 ) Power supply
August 5, 2014 11:15:43 AM

^Yes, there's no need to live on the edge.
850W will be on the safer side.
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August 6, 2014 6:48:32 AM

Thanks for your responses guys. The system is already built. I have ordered my second card and it will be arriving on Tuesday. Does seem like im going to have to replace the power supply. Checking on the Sapphire site and they state 1000w is required for crossfire. I think I will order a 1000w PSU.

The Novatech power supply I have is actually very good. Novatech happens to be 2 miles down the road from me and in the past their PSU's left a lot to be desired. However last year they launched a new range and they have had very good feedback, my experience is consistent with this feedback.

Using http://www.extreme.outervision.com/psucalculatorlite.js... I have calculated that I need 633w. My PSU is 750w 80+ so it will always give at least 600w output. I have never had a system so close to the power. I was wondering if anyone else had a system running that close and how it behaved.

Oh and thanks for establishing that I should have an 850w PSU. But I will not be buying one. I would like a 1000w PSU if im going to replace.
Not sure which one to go for.

Im looking at the corsair rm1000 and the Coolermaster v1000. Does anyone have any experience of using these PSU's?

Thanks again.

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a b ) Power supply
August 6, 2014 8:31:40 AM

They're both good, but the EVGA Supernova G2 or P2 1000W are much, much better. See if you can afford one of those. :) 
Enjoy!

Solution removed at request of OP - SS
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a c 77 ) Power supply
August 6, 2014 8:36:09 AM

The Corsair is a good one, but I'd rather buy an Antec or SeaSonic PSU. They are thought to be much more reliable. EVGA is good too. You may want to look up EVGA 120-G1-1000-VR 1000W 80 Gold+ Fully Modular.
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a b ) Power supply
August 6, 2014 8:37:23 AM

MeteorsRaining said:
The Corsair is a good one, but I'd rather buy an Antec or SeaSonic PSU. They are thought to be much more reliable. EVGA is good too. You may want to look up EVGA 120-G1-1000-VR 1000W 80 Gold+ Fully Modular.


The G1 series isn't a good choice. The new EVGAs are the best PSUs out right now. :) 
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a c 77 ) Power supply
August 6, 2014 9:45:08 AM

I certainly agree. But isn't that jumping over his budget? If you specify the budget asker, it'd be really easy and helpful :) 
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August 6, 2014 10:15:55 AM

Definitely wont be buying EVGA, had bad experiences in the past with their products and they cost a lot of money. A friend of mine lost his whole system to an EVGA psu. I dont like EVGA products in general and I wont buy from them again.

I think im going to opt for the corsair. Its a good price at the moment.

How are you guys determining reliability? I understand brand counts for something but is there like some hard data about PSU's out there? I personally have never had a problem with any PSU for the 15 years ive been building computers.

Thanks again.
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a b ) Power supply
August 6, 2014 10:20:21 AM

Some EVGA products are good, some are not so good. The G2 and P2 series are amazing, and great value. They also have a 10 year warranty.
The PSUs aren't actually made by EVGA themselves, they're made by Super Flower. :) 
Which Corsair?

Edit; Blackbird said it perfectly. :) 
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a c 2488 ) Power supply
August 6, 2014 10:21:32 AM

Only EVGA MODELS THAT ARE GOOD: B2 , G2 , P2 and soon to be T2.

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August 6, 2014 11:42:54 AM

Sorry will never buy anything with "EVGA" on it again, personal preference, even if another company actually makes the power supply. Im sure you guys have had good experiences but I wont go near them with a bargepole. They are also more expensive than other reputable brands such as Corsair.

A quick google search yields this;
http://www.bit-tech.net/news/hardware/2013/11/28/evga-s...

Also customer reviews are slightly worse for the EVGA G2 than the Coolermaster V1000 and Corsair RM1000.

My only issue with the Corsair RM1000 is that it might have a Corsair fan on it. Corsair system fans are dreadful and very loud. I was hoping someone might own an RM series power supply who could comment on its performance?

The Coolermaster V1000 has very good reviews and is made by a brand which over the years has impressed me (In particular my keyboard). Does anyone have experience of using this power supply?


Thanks.
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a c 2488 ) Power supply
August 6, 2014 12:20:42 PM

Published on 28th November 2013 < Look at the date of that article....OLD NEWS

Fixed ages ago

RM supplies are overpriced and use junk capacitors and have fans that get loud over time.
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a b ) Power supply
August 6, 2014 12:23:36 PM

SR-71 Blackbird said:
Published on 28th November 2013 < Look at the date of that article....OLD NEWS

Fixed ages ago

RM supplies are overpriced and use junk capacitors and have fans that get loud over time.


Agreed. It's silly not to go with the obvious best choice just because you've had a problem with an EVGA product in the past. :) 
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a c 2488 ) Power supply
August 6, 2014 12:24:32 PM

They replaced all that qualified for the replacement.
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August 6, 2014 3:07:49 PM

Its old news yes. But its still had a problem. People have still bought this PSU and had an issue. I guess my point was that EVGA isnt as reliable as other manufacturers. Ive actually lost 2 EVGA products in the past and how they dealt with me when I contacted them wasnt very good either. Its a personal thing.

It isnt the "obvious best choice" as you put it anyway:

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

Ive made my decision, I will be ordering a Coolermaster V1000. Its actually a seasonic PSU. If you compare the results you will see that the coolermaster outperforms the EVGA and even its own name, performing within the boundaries of a platinum rated PSU. I cannot find much negative about it, it has a better track record reliability wise than the EVGA. Most negative comments are on its price but as its cheaper than the EVGA (It is in the UK at least) then I believe thats pretty moot.
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a b ) Power supply
August 6, 2014 3:25:41 PM

Sounds great! Excellent choice. Considering the EVGA units are cheaper in most countries and have slightly better ripple suppression, I'd say they're the best choice in my opinion (in countries unlike yours where it is actually cheaper).
The V1000 is an amazing PSU, you'll be really happy with it.
Enjoy! :D 
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August 7, 2014 7:45:51 AM

Hmm.... the V1000 IS better than an EVGA G2. Could you explain to me why the better ripple suppression is more important than better efficiency or voltage regulation?

From the research I have conducted the better ripple suppression of the G2 will have little effect on a users system over the V1000's whereas more efficiency will lower my energy bill (by a tiny amount) and the voltage regulation on the coolermaster is better than the EVGA too. Yet you say the G2 is better. Please could you explain why? It does say you are a power supply expert after all.

Thanks.
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a b ) Power supply
August 7, 2014 7:52:40 AM

It all comes down to the price but it is up to people to make their own purchase decisions but the G2 P2 is of the comparable quality at a savings. I went with the EVGA B2 series since I wanted good quality at an even lower price.
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a b ) Power supply
August 7, 2014 7:52:56 AM

ScubaDynamo said:
Hmm.... the V1000 IS better than an EVGA G2. Could you explain to me why the better ripple suppression is more important than better efficiency or voltage regulation?

From the research I have conducted the better ripple suppression of the G2 will have little effect on a users system over the V1000's whereas more efficiency will lower my energy bill (by a tiny amount) and the voltage regulation on the coolermaster is better than the EVGA too. Yet you say the G2 is better. Please could you explain why? It does say you are a power supply expert after all.

Thanks.


Ripple is the biggest killer of components, although the CM has great ripple suppression too. The voltage regulation on both units are very similar. I say the G2 (or the P2 as it's a more relevant comparison) is better because of the fan that only spins up when it needs to, and the fact that they are cheaper than the CM in most countries.

Compare the ripple suppression of this,
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
With this.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
The efficiency of the P2 is also slightly better. :) 
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August 7, 2014 8:15:54 AM

Right. Yes the P2 is better. But You said the G2 was better. You are right ripple does kill a lot of components. I have read about this. But the coolermasters is fine.

How is the G2 better than the V1000 was my question?
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a b ) Power supply
August 7, 2014 8:26:12 AM

It has better ripple suppression, and it's cheaper. So it's better value.
Lol how you got my answer deselected. I've spent this long helping you out and I find that a little offensive. What I said was right.
I said the V1000 is a GREAT PSU. The P2 is better, and the G2 is better value and has better ripple suppression. The only thing worse about it that the CM has slightly better regulation and efficiency. But, what you got is great. As I already said.
Mmkay?
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August 7, 2014 8:37:12 AM

Youve not been any help whatsoever. You have been very patronising, rude and your advice whilst not terrible its not as good as something I found from doing some research myself. Are you a "Power Supply Expert" because you have a degree in electronic engineering or have you just read a lot of reviews. I can read reviews, so can most people. I was hoping I could speak to someone who either had experience with the PSU's I was looking to buy or who has some actual technical knowledge. I guess I should have known, the internet is full of "know it alls" who dont actually know it all.

P.S. Your first piece of advice an 850w PSU would have voided the warranty on both my cards. Sound expert you are.
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a b ) Power supply
August 7, 2014 8:51:19 AM

No, it wouldn't have voided your warranty. That's ridiculous.

You are the one being disgustingly rude, to somehow who has gone out of their way to give you advice as best as they could.
I've built many PCs and keep up to date with all the new PSUs and other components that come out, and look at every review I can find in order to give the best advice as I possibly can. I gave you all the information you asked for, and was really nice about doing so. Never have I ever been called rude on these forums before.

Even the most helpful person with the most solutions on these forums agreed with what I said. Being a 'Power Supply Expert' only means that other people have found my advice helpful. 'Know it all'? Grow up. I gave you the best advice I could based on all of the research I have done. Why did you even bother asking if you think you know everything yourself, based on looking at a single review.

'the V1000 IS better than an EVGA G2. Could you explain to me why the better ripple suppression is more important than better efficiency or voltage regulation?' I explained this as well as I could. And I'm confident what I said is correct.

I have had experience with the G2 series, and I know that the V1000 series is also great based on many different reviews and feedback of those who have bought them.

So how have I been patronising and rude? You seem to be an ungrateful, arrogant human being and I'm getting very sick of talking to you.
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August 7, 2014 8:55:48 AM

Dont then. Please leave my question alone! Im actually going to see if I can block you from my posts in the future (If I even bother, if your an expert then anyone with the ability to read a review is here).
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a b ) Power supply
August 7, 2014 9:00:16 AM

I hope I never see you on these forums anymore, as you haven't taken into account any of the advice people more experienced then you have gone out of their way to give you. It's disgusting. Why even bother asking us if you think you can figure everything out yourself?

No need to block me, what in the world makes you think I would ever want to help you out again? Ha.

Good bye.
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a c 77 ) Power supply
August 7, 2014 9:00:33 AM

http://www.tomshardware.co.uk/answers/id-1804779/power-...
This might help the asker, and calm down both of you!
Undoubtedly the new EVGA B2 , G2 and P2 are one of the best.
I'm sorry but this is a discussion forum, people try to help you out of your problem based on THEIR knowledge.
You have full right to argue, but please be mild, they're taking out their time for you. This forum is the most helpful if you're kind enough.
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a b ) Power supply
August 7, 2014 9:02:44 AM

MeteorsRaining said:
http://www.tomshardware.co.uk/answers/id-1804779/power-...
This might help the asker, and calm down both of you!
Undoubtedly the new EVGA B2 , G2 and P2 are one of the best.
I'm sorry but this is a discussion forum, people try to help you out of your problem based on THEIR knowledge.
You have full right to argue, but please be mild, they're taking out their time for you. This forum is the most helpful if you're kind enough.


Exactly! Thank you. I'm quite offended by his ignorant words, so I've been more hostile than I would like to be.
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a c 77 ) Power supply
August 7, 2014 9:07:54 AM

Alex Kelly said:
MeteorsRaining said:
http://www.tomshardware.co.uk/answers/id-1804779/power-...
This might help the asker, and calm down both of you!
Undoubtedly the new EVGA B2 , G2 and P2 are one of the best.
I'm sorry but this is a discussion forum, people try to help you out of your problem based on THEIR knowledge.
You have full right to argue, but please be mild, they're taking out their time for you. This forum is the most helpful if you're kind enough.


Exactly! Thank you. I'm quite offended by his ignorant words, so I've been more hostile than I would like to be.


Happens :) 
Asker, what will we get by suggesting you a not-necessarily expensive or bad quality PSU? It's not about knowledge, but rather experience which make someone wise.
I'm not being a philosopher or middle-man here, I'm a CPU expert myself, but I can't tolerate exchange of such rude terms.
Please be a little calm and try to analyse what an expert says, we don't become experts here by qualification, but rather by votes of people we don't even know, who voted our solution as the best.
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a b ) Power supply
August 7, 2014 9:08:14 AM

Civility goes a long way folks. Attack ideas and opinions with facts (and sources). Don't attack each other. You have been warned.
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August 7, 2014 9:37:22 AM

Hmm, that is just a list made by another forum poster. If you look at the specifications and testing the Coolermaster IS better. Also the reviewers seem to claim the V1000 has better build quality than the EVGA. So on Benchmarks and build quality the V1000 is better. Its also never had a product recall so its got a better reliability track record.

If anyone can get me some test results that back up an EVGA G2 over a V1000 I will concede that its better. I still wont buy it because its EVGA.

I had already stated I was not interested in EVGA products so it wasnt a very good solution at all. All you did was tell me im wrong not to trust EVGA. Im not wrong, I HAVE had a bad experience with these people.

I can respect that you may have had a good experience with this PSU. Great but no one here claimed they had any experience with the V1000 (Or the RM series despite assuring me that they are very bad).

Customer reviews in the UK at least rate the Coolermaster to be better than the G2 and the G2 has a worse track record with a product recall. On top of all this its more expensive.

To quote a response on enquiring about the V1000 and RM series:
"They're both good, but the EVGA Supernova G2 or P2 1000W are much, much better. See if you can afford one of those. :) 
Enjoy!"

All im asking for is clarification on this point. Where do you get your knowledge from? As the reviews im reading contradict your posts.

Id like to think im using facts and knowledge. Really the most important thing was that I clearly stated I did not want an EVGA product. Was then told in a rather rude manner that my experiences were a one off and I should go with the "Obvious best choice". Why is it so obvious?
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