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Which PSU should I get?

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Hey guys,

I'm thinking of building a new PC specifically for gaming, and am wondering which PSU I should get.
I'm really troubled by this since I don't know the first thing about PSU, so hoping for your help with this.

Here are the components I'm getting:

CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor
Mobo: ASRock Z97 EXTREME4 ATX LGA1150 Motherboard
RAM: G.Skill Trident X Series 8GB (2 x 4GB) DDR3-2400 Memory
HDD: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
GPU: Sapphire Radeon R9 290 4GB Tri-X Video Card

This is the store I'm using as I can get a special deal there:
https://www.umart.com.au/umart1/pro/index.phtml?bid=9


But like I said before, I really don't know anything about power supplies, and really confused when looking at this list:
http://au.pcpartpicker.com/parts/power-supply/#sort=d6

I have no idea what the different efficiencies are, what are the recommended watts for my build and whether it's modular or not,
since this is my first time building a PC.

Here's some additional information, I don't know whether they are useful or not:
1. Yes I'm planning on overclocking in the future, but not decided on air or liquid cooler yet, should I leave more headroom for this?
2. I'm not using an optical drive.
3. I will buy a SSD later as well.


And for the PSU, are there some brands or series which are better than the others? And should I leave more headroom (more watts)
for the PSU for future proofing, so I can switch out parts like the GPU in the far future without hassle?

I'm really looking for the best bang for the buck here, but don't want to damage those expensive parts I paid and also not too limited as well.

Anyways really appreciate any help you guys can give!

Best Regards,
sapped
 
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650W should be enough for the system,maybe a bit more for more future expansion. In terms of brand XFX,seasonic and Corsair be good choice. Others will require doing bit more research.
 
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650w for that rig is nowhere near enough; just the 290 alone can pull 22A. And he's overclocking, I would say 850w minimum.
 
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650w for that rig is nowhere near enough; just the 290 alone can pull 22A. And he's overclocking, I would say 850w minimum.
What!? 22A x 12 volts = 264 watts. They need (850-264) 586 watts to run the rest of their system?
 
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Hey guys thank you so much for all your replies, really appreciate this.

So 750W is the best bet for future proofing? I forgot to mention this last time, but I'm also planning to add a SSD
sometime in the future as well. So would rather spend a little more now and not be limited in the future.

Also an important thing I'm wondering is, is it justifiable to get the 80+ Platinum over the Gold ones?
Since these ones generate less heat, runs quieter, and also consume less electricity/power, but by how much?

If it is significant I would very much like to spend on the platinum ones.
 

Ebo

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I have a 700 watt PSU to run my system, and thats enough.
Should I get a new PSU today I would seriously consider the EVGA Supernova ver. 2 in either 750 or 850watt, if you wants to go for xfire in the future.
 
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650w for that rig is nowhere near enough; just the 290 alone can pull 22A. And he's overclocking, I would say 850w minimum.
Its just one 290 right? A 550 watt would run that system. A Seasonic 620w Bronze would do nicely and often go on sale. Or Corsair HX750
 
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What!? 22A x 12 volts = 264 watts. They need (850-264) 586 watts to run the rest of their system?
Ok, sorry; I might have exaggerated a bit. If it's single rail he'll be fine, but if it's multi-rail it might trigger the OCP.
 
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Alright thanks, looks like the best price is the G2.

Although something I'm wondering, if I were to upgrade to a crossfire setup sometime in the future, will the 750W PSU be enough?

If I buy a higher watts one (say 1000W), will it consume more power while operating the same setup I got, compared to the lower watt one (say 750W)?
So more heat, electricity cost etc.

Or does it only increase the maximum limit so more possible upgrades can be applied on top?
 
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If you mean will it consume 1,000 watts just because it's rated up to 1,000 watts then no it will only consume what it needs to use. 850 watts is probably enough for CrossFire R9 290s.
 
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BUCK NASTY

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Alright thanks, looks like the best price is the G2.

Although something I'm wondering, if I were to upgrade to a crossfire setup sometime in the future, will the 750W PSU be enough?

If I buy a higher watts one (say 1000W), will it consume more power while operating the same setup I got, compared to the lower watt one (say 750W)?
So more heat, electricity cost etc.

Or does it only increase the maximum limit so more possible upgrades can be applied on top?
PSU's have a sweet spot for efficiency(notably Gold and Platinum). Their highest efficiency is generally achieved in the 50% load range. While I have pushed PSU's to 90%+ load in the past without issue, I'm factoring in the additional efficiency of a 50% load going forward. I just bought a EVGA Supernova G2 1000 and currently have it loaded @ 760W at the wall(680W load) for 24/7 use in F@H. This thing is a beast and is barely breaking a sweat. Definitely an improvement over the PCP&C 750w Silencer Mark VI that sounds like a Wind Tunnel under the same load and saved 100w of electricity in doing so. Looked at the EVGA P2 line and the additional cost is not worth the minimal improvement in efficiency.
 
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peche

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Two 6950s with my overclocked FX 8350 uses about 700w at the wall (an estimated ~600-630 watts) out of my 750w Corsair AX750. It's a little more than I'm comfortable with (the PSU gets a bit of coil whine), but that's Furmark + Prime95. I forgot to check load usage under gaming.
If I recall correctly, the 290 uses a bit more power than my 6950/70, so I'd guess that for crossfire purposes, ~850w would be the minimum with about 1000w or more recommended, if only for efficiency and insurance.
I had two 4870s running off of a 550w PSU back in the day which worked well for a good while, but it slowly weakened the PSU and can't handle that kind of load anymore (running Folding@Home and WCG 24/7 certainly didn't help.)
 

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Hey guys, some complications just occured, and in dire need of your advices.

Turns out they don't have any EVGA SuperNova G2 750W in stock at that store, they only have the 850W ones.
However I need to buy all the components from that store in order to get the special deal there.
So I really don't know what to do at the moment.

The store staff say they may have new stocks arriving on the 20th of Jan, should I wait until then for the 750W one ($145 AUD),
or just purchase the 850W one ($179 AUD) right now?

750W already seems to be overkill when 650W is already enough for my new rig, and add another 100W on top seems to be a big waste.

I don't think I will go CrossFire since there's a lot of compatibility problems associated with the games I play. But on the slim chance that
I do decide to pick up another Sapphire R9 290 card in the future, will the 850W PSU be enough considering I'm also heavily overclocking
my CPU (i7 4790k) to 4.7Ghz? And add multiple fans, maybe even water cooler on top.

So I'm really lost on what to do. If I just stick to a single R9 290 in the future, will the 850W be a wastage? Like will it even be in the optimal
efficiency range for different load levels?

If so then I don't think there will be any point in spending more money on a less efficient PSU for my need. Although should I leave more
headroom anyway if I decide to upgrade to a new GPU many years later?

So what are your opinions about this? Really appreciate any feedbacks.
 
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Its your preference. The 850w will be slightly more efficient. But not enough to justify the $. How about another brand? Seasonic. Corsair?
 
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Hey bro, thanks for your reply

After some extensive research, the only ones I'm considering to buy are from the tier one on the PSU tier list here:
http://www.tomshardware.com/forum/id-1804779/power-supply-unit-tier-list.html

And these are the ones available in store:

https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...

However these ones are also incredibly overpriced, even the Seasonic X-650W one cost more than the EVGA G2-850W.

What's even more outrageous is that their ripple supression and voltage regulation are worse compared to the
EVGA SuperNova G2, even those Platinum ones from Corsair and Seasonic!

http://www.overclock.net/t/1482157/700-750-watts-compar...

It looks like there's really not much choices to be had...
 
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Hey bro, thanks for your reply

After some extensive research, the only ones I'm considering to buy are from the tier one on the PSU tier list here:
http://www.tomshardware.com/forum/id-1804779/power-supply-unit-tier-list.html

And these are the ones available in store:

https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...
https://www.umart.com.au/umart1/pro/Products-details.ph...

However these ones are also incredibly overpriced, even the Seasonic X-650W one cost more than the EVGA G2-850W.

What's even more outrageous is that their ripple supression and voltage regulation are worse compared to the
EVGA SuperNova G2, even those Platinum ones from Corsair and Seasonic!

http://www.overclock.net/t/1482157/700-750-watts-compar...

It looks like there's really not much choices to be had...
Since the EVGA Supernova G2 is less than those Seasonics then I would definitely get the EVGA. It's a great PSU.
 

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i would stick to seasonic ... also some EVGA's are made by seasonic, or choose thermaltake which as never dissapoint me ...

Regards,
 
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Since the EVGA SuperNova G2 is really the best bang for the buck, if I were to use the 850W for the single card setup,
would this be recommended? Or would too much resource be wasted?

Sorry I'm really lost again after reading some information from different sites. I don't know if I'm understanding this correctly,
but isn't using a PSU with too much Wattage than required not recommended as well?

Here's the quote:

"Power supplies are also most efficient when between like 50% to 80% usuage. Buying one too big might mean that your usuage won't put you in that most efficient range of the unit"

"but it will waste more power at lower loads because the efficiency will be lower the more wattage extra you got. So you start by spending money you dont need and you then keep wating money on your power bill because of the lower efficiency you get from having too much wattage."

So will I be under the efficiency range if I'm at full load or half load for my rig in order to be most efficient with the power?

Would you recommend to wait 3 weeks for the 750W one or buy the 850W one now? Since it looks like spending more money
is actually detrimental in this case if I understand correctly...
 
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Since the EVGA SuperNova G2 is really the best bang for the buck, if I were to use the 850W for the single card setup,
would this be recommended? Or would too much resource be wasted?

Sorry I'm really lost again after reading some information from different sites. I don't know if I'm understanding this correctly,
but isn't using a PSU with too much Wattage than required not recommended as well?

Here's the quote:

"Power supplies are also most efficient when between like 50% to 80% usuage. Buying one too big might mean that your usuage won't put you in that most efficient range of the unit"

"but it will waste more power at lower loads because the efficiency will be lower the more wattage extra you got. So you start by spending money you dont need and you then keep wating money on your power bill because of the lower efficiency you get from having too much wattage."

So will I be under the efficiency range if I'm at full load or half load for my rig in order to be most efficient with the power?

Would you recommend to wait 3 weeks for the 750W one or buy the 850W one now? Since it looks like spending more money
is actually detrimental in this case if I understand correctly...
If you're going to overclock everything with a single R9 290 then you are going to be close to the peak efficiency of that 850 watt PSU. With a 750 watt it would be slightly less efficient. Maybe 1% or 2%.
To get an idea of how insignificant that is.......

20 hours gaming per week * 450 watts * 1% inefficiency * 52 weeks / 1000 * 12 cents per kWh = 56 cents or $1.12 (if 2%inefficiency) more per year on your power bill. So if you can get the 750 watt power supply for cheaper then I would go that route. It's still more than enough since you eliminated CrossFire.
 
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Case Corsair Obsidian 750D Airflow Edition
Audio Device(s) Onboard
Power Supply EVGA SuperNova 850 W Gold
Mouse Logitech G502
Keyboard Logitech G105
Software Windows 10
It's been pointed out to me that I underestimated the power requirements of that card so let's say 600 watts max for the system overclocked. That only changes the additional cost on power bill to $1.50 per year. Of course that's assuming that you are paying 12 cents per kWh but it's still insignificant even if you're paying double that.
 
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