Which PSU? Enough or too much for this specs?

[wrenaudrey]

Got £150 budget, which of one of these PSU choices:
http://www.ebuyer.com/227503-corsair-850w-ax850-modular-psu-cmpsu-850axuk
http://www.ebuyer.com/265709-ocz-zx-series-850w-80-gold-psu-fully-modular-psu-ocz-zx850w-un

Computer specs:
i7-3570k (will be mild OC'ed; ~4.5Ghz)
ASUS P8Z77-V PRO
Corsair Vengeance 2x4GB DDR3 1600Mhz CL9
Noctua NH-D14
Sony DVD+/-RW 24x
WD 1TB Black SATA3
128GB Samsung 830 SATA3
ASUS Xonar D2X Soundcard
ASUS GTX 670

What wattage PSU would you recommend?
Would 850W be too much or what?
Which one would be the best; Corsair AX850W

 

[wrenaudrey]

Accidentally pressed something and it posted it :S

*EDIT*
Which one would be the best; Corsair AX850W or OCZ 850W for this sytem?

 

[C12Friedman]

850W is a little overkill here unless you intend to SLI in the future in which case I'd say you're still up there but not quite at overkill. Without the want to SLI, I would personally suggest a 550W-650W.
http://www.ebuyer.com/174182-ocz-modxstream-pro-600w-psu-80-sli-certified-atx12v-ocz600mxsp-uk
or
http://www.ebuyer.com/279548-corsair-tx550m-550w-modular-power-supply-cp-9020001-uk
or
http://www.ebuyer.com/341395-antec-520w-high-current-gamer-modular-psu-0-761345-06211-4
Of course if you do intend to SLI in the future (or there is that possibility), of the two 850W PSU's you show there, I'd go with the OCZ since it's cheaper and still highly rated.
My $0.02 worth

 

[bigcyco1]

nVidia itself recommend 500W for a single 670. Add 170W for SLI & recommended is 670W.
http://www.nvidia.in/object/geforce-gtx-670-in.html#pdpContent=2


For testing conducted for SLI 670, the resulting system consumption for SLI is 433W of which 293W are attributed to the gpu cards.
http://www.guru3d.com/article/geforce-gtx-670-2-and-3way-sli-review/4
I would suggest Corsair Professional Series AX750 750W Modular PSU - 80plus Gold Certified if your only interested in the Corsair AX series or OCZ ZX Series PSU'S then http://www.ebuyer.com/227500-corsair-professional-series-ax750-750w-modular-psu-80plus-gold-certified-cmpsu-750axuk

 

[Silvune]

Considering that a high quality 650W PSU is more than enough for a GTX 670 SLI system I would buy/suggest one of these:

Be Quiet Dark Power Pro P10 750W (£130 @ Ebuyer)
http://skinflint.co.uk/790490

Corsair HX750 - 80 Plus Gold (CP-9020031) (£110 @ Dabs)
http://skinflint.co.uk/827539

NZXT Hale90 750W (£110 @ Scan)
http://skinflint.co.uk/557340

Antec High Current Pro HCP-750 (£115 @ Dabs, £120 @ Ebuyer)
http://skinflint.co.uk/584917

 

[wrenaudrey]

Ok, so i have decided do lower the wattage that im going to buy.
I've decided to either go for a 650w or a 750w
http://www.ebuyer.com/279550-corsair-professional-series-gold-ax-650w-modular-psu-cp-9020006-uk
http://www.ebuyer.com/227500-corsair-professional-series-ax750-750w-modular-psu-80plus-gold-certified-cmpsu-750axuk

I know that for just 1 GTX670, a 650w is more than enough; but how about if i go SLI. Will the 650w be sufficient or is it better to just spend £15 more and get the 750w instead?

 

[wrenaudrey]

I would personally spend the extra 15 pounds for the 750 (i'm into a little overkill - not too much - with PSU's) so I'm okay with that. Something to consider here is the PSU is likely to outlast your build so anticipating a possible higher power need in the future, I think you can justify the extra expense.

So are you saying that my assumption; to get a 850w PSU was all along better?

 

[C12Friedman]

I would personally spend the extra 15 pounds for the 750 (i'm into a little overkill - not too much - with PSU's) so I'm okay with that. Something to consider here is the PSU is likely to outlast your build so anticipating a possible higher power need in the future, I think you can justify the extra expense.

 

[C12Friedman]

Personally, I have two machines that draw about the wattage you'll be around. One has a Seasonic 650W, the other a Kingwin 1000W - the 1000W is way overkill but I wanted the additional connectors it offered. I don't have any problem using an 850W especially if you're intending to SLI in the future. As bigcyco points out, in SLI you'll be drawing about 433W, that'll put an 850W PSU at just over 50% draw, which is in the "sweet spot" of power delivery and at a draw that shouldn't generate a lot of heat in the PSU. Theoretically, it should last longer.

 

[bigcyco1]

Here's the breakdown on who makes what in the power supply world, if anything you want to know isn't shown let me know and i'll add it.

http://www.realhardt...vos/Page541.htm
Now any reason why your favoring getting a AX series ? Corsair doesn't actually build PS in case you didn't know.Corsair is a well known supplier of PSU's with top notch ratings with good value. The models made by Seasonic tend to be the quietest. The AX series is top notch but overpriced IMHO. I would recommend you get a PSU just as reliable and save some coin.

 

[wrenaudrey]

Here's the breakdown on who makes what in the power supply world, if anything you want to know isn't shown let me know and i'll add it.

http://www.realhardt...vos/Page541.htm
Now any reason why your favoring getting a AX series ? Corsair doesn't actually build PS in case you didn't know.Corsair is a well known supplier of PSU's with top notch ratings with good value. The models made by Seasonic tend to be the quietest. The AX series is top notch but overpriced IMHO. I would recommend you get a PSU just as reliable and save some coin.

Im a afraid your link doesnt work; i was looking forward to see what it contained.
And also, unfortunately SeaSonic is not available @ http://www.ebuyer.com/store/Components/cat/Power-Supplies
That is why i just have to go with something close to Seasonic standard and what ive read; Corsair is the one.
Also what did you mean quietest? In the fan operation or they're quiet for not being advertised much?

 

[Silvune]

This is the link:
http://www.realhardtechx.com/index_archivos/Page541.htm

Ok, so i have decided do lower the wattage that im going to buy.
I've decided to either go for a 650w or a 750w
http://www.ebuyer.com/279550-corsair-professional-series-gold-ax-650w-modular-psu-cp-9020006-uk
http://www.ebuyer.com/227500-corsair-professional-series-ax750-750w-modular-psu-80plus-gold-certified-cmpsu-750axuk

I know that for just 1 GTX670, a 650w is more than enough; but how about if i go SLI. Will the 650w be sufficient or is it better to just spend £15 more and get the 750w instead?

If a system with two GTX 670s draws less than 650W, then you can use a good 650W PSU. The fact that Guru3D and other review sites shows a system with an i7-965/i7-3960X (easily 50W more power hungry under load than a socket 1155 i5/i7) and two GTX 670s drawing ~450W under load means that a 650W PSU is already kind of overkill in this day and age. Also remember that the 450W load is probably peak and only attained for a few seconds at a time. High quality PSUs, like the Corsair AX series, can deliver their full rated power continuously. The only problems that should occur are increased fan noise and reducing life span from greater than 10 years down to slightly less than 10 years.
Something else to say about fan noise is that if you pick the right unit then you won't even get increased fan noise because the fan used is so slow spinning.

So are you saying that my assumption; to get a 850w PSU was all along better?

Only if you really want to overkill and/or want to have virtually unlimited upgrade options - and by that I mean upgrading to two or more graphics cards which are more power hungry than GTX 670s.

 

[wrenaudrey]

Thank you silvune. I guess ill be going back to my previous decision and agree with you on the 650W (and keep an extra £45 in my pocket xD)

Just to throw another wild question in there...
Do you think Gfx cards; actually in fact CPU's and GFX cards-in the future; go back to much more power hungry, stay with te current power requirements or even draw much less power?

 

[Silvune]

It's hard to say that there are any rules about power consumption going up or down. For instance 7970s are more power hungry than 6970s, but GTX 680s are less power hungry than GTX 580s.
There are probably some 7000 series GPUs which are less power hungry than equivalent 6000 series GPUs as well.

Socket 1155 CPUs are less power hungry than it's predecessors, but socket 2011 CPUs are, if anything, more power hungry than Socket 1366 CPUs.

However most other people seem to believe that generally the curve is downwards.

 

[wrenaudrey]

Indeed. I too would agree with downwards. But i think there would probably be a limit on how low it would get. I dont ever think we'll be able to power computers the power that they have now and just running on like 10W. But then again, its the future.

Thank you all for your inputs and suggestions.
I have decided to purchase the Corsair AX650W.

 

[bigcyco1]

I apologize about my link not working the one i was trying to link is the one other member so kindly re post thanks silvune his link worked i hope here i will post a few useful links for you and double check they are working this time http://www.realhardtechx.com/index_archivos/Page541.htm for in-depth psu reviews. Here is a handy chart of power supply reviews available: http://www.overclock.net/power-supplies/738097-psu-review-database.html#post9426914

If you'd like to know who manufactures a certain power supply, here are some charts and instructions that you can use to look it up:
http://whirlpool.net.au/wiki/PSU_Manufacturers
http://www.jonnyguru.com/modules.php?name=NDArticles&op=Story&ndar_id=24
http://www.tomshardware.com/reviews/psu-manufacturer-oem,2729-2.html
http://www.realhardtechx.com/index_archivos/Page541.htm Also on another note, i use to use this site as quick basic reference when i was a noob about PSU and took me quite a while to understand the basics of how it all works if anything listed here is on the tier #4 or #5 list it's basically garbage http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&ved=0CFwQFjAG&url=http%3A%2F%2Fwww.eggxpert.com%2Fforums%2Fthread%2F323050.aspx&ei=qyE7UPGvEciWiAKPy4HQCg&usg=AFQjCNF4LQK_xCtr9rynHrhb2Zxj4i_4pQ&sig2=pLRjl_0FU8Z44mXK7jMaRQ that is a quick handy Tier Breakdown:

Tier 1 provides the best quality power, great for overclocking, super high-end systems, and bragging rights. The best of the best. Very good longevity.
Tier 2 offers very good quality power output, and great reliability. Highly recommended for use in new systems.
Tier 2b contains units that almost made Tier 2, but may not have quite as good quality output(still very good), or may not last as long. Recommended for systems not expected to run 24/7 for several years.
Tier 3 power supplies fully meet all ATX requirements for power output quality, but don't have as good of power output quality as above tiers. No reason to replace one if you have one, and they're still good choices for most systems.
Tier 4 units may have some problems, such as being unable to deliver rated power at higher temperatures, or being slightly out of ATX spec on power output quality. Not recommended to buy except in situations where you will not be stressing it, or expecting it to last for more than a few years. If you have one, you can probably keep using it unless you're experiencing problems.
Tier 5 power supplies are NOT RECOMMENDED. If you have one, you should strongly consider replacing it ASAP. These can damage your computer, and often cannot put out the power that they're rated for. If a brand name is listed here, then all models from that brand name are considered to be Tier 5, except for those specific models listed above. Anyway,hope this helps mate and best of wishes,good luck!

 

[bigcyco1]

o.k. well i still would suggest a better bang for buck just as reliable and well built 750W psu but if your set on that choice no worries it's not a bad choice just not worth it's high price IMO other then that it's a very reliable top notch ps that will serve you well for many years to come enjoy!

 

[wrenaudrey]

o.k. well i still would suggest a better bang for buck just as reliable and well built 750W psu but if your set on that choice no worries it's not a bad choice just not worth it's high price IMO other then that it's a very reliable top notch ps that will serve you well for many years to come enjoy!

Why, what would you recommend?

 

[bigcyco1]

Im a afraid your link doesnt work; i was looking forward to see what it contained.
And also, unfortunately SeaSonic is not available @ http://www.ebuyer.com/store/Components/cat/Power-Supplies
That is why i just have to go with something close to Seasonic standard and what ive read; Corsair is the one.
Also what did you mean quietest? In the fan operation or they're quiet for not being advertised much?

Sorry for the confusion i should of also been more clear in what i meant was i use to work at a mom and pops type computer store and during that time i did allot of repairs and testing of all the products that were being sold in the store and i tested just about every Corsair CX series HX series AX series and in my testing i found the AX series was quieter than the CX series & HX series i would also say that i couldn't till just by ear i actually was doing these tests with Load Tester also known as ATE (Automatic Test Equipment)precision power meter.and a bunch of other high end test testing elect. Total cost my boss had told me was USD 3,365.00 i know. As for PSU i would recommend Silverstone Strider Gold Evolution 750W or XFX PRO750W XXX Edition Semi-Modular 80Plus Silver 750 Watt Power Supply built by seasonic btw CORSAIR HX Series HX1050 1050W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply which ever is cheaper of those would be a solid choice anyway hope this helps mate.

 

[bigcyco1]

Why, what would you recommend?

Oh so you only want to buy from that site hmmm... not really liking these limited choices but i would get this one mate i personally have this PSU in my wife rig she doesn't game allot but right now running GTX 590 no issues whatsoever it's also built by seasonic and it's better bang for your buck http://www.ebuyer.com/177664-xfx-850w-black-edition-modular-psu-13-5cm-fan-80plus-silver-certified-p1-850b-ukg9 £106.57 saves you some nice pocket change over the AX 750