PSU for new system

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Epsilon8425

Epsilon8425

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Hi

I'm building a new PC (sort of, I'm re-using some components from my current PC) and I need help choosing a PSU. So far I like the Corsair AX860 (the non-i version) however I'm not sure it will provide enough power. I checked using the eXtreme Power Supply Calculator and I get 825w using the following settings:

Motherboard: regular desktop (haven't decided which yet, probably either ASUS VII Hero or Z97 Pro/Deluxe)
CPU: Intel 4790 (I will be getting the k version and overclocking but the calculator didn't have it)
RAM: 4x DDR3 1866 1.5v
GPU: 2x HD 7970 GHZ
SSD: 1x Samsung 840 Pro 256GB (I will add more in future)
HDD: 2x 7200RPM WD Black 500GB
Optical: 1x DVD RW
Cooling: Corsair H100i
USB devices: 5-6
Fans: 6-7 high performance (incl water cooling fans), some with LEDs
Load: 100% (I used this setting just to be safe even though the system won't often be at 100% load, if ever. At 90% load the usage was 740w with no overclocking)
Capacitor aging: 20% (I will be keeping this PC for awhile and in the notes it says to use 10-20% in this case)

With the above it seems to be getting pretty close to 860w without overclocking and I would like room to upgrade in the future (Probably won't ever go for more GPUs just more storage, blu-ray drive etc.)

My question is will a Corsair 860w platinum rated PSU likely be enough or should I spend more to get a 1000w PSU?

Any help would be greatly appreciated.
 
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iam2thecrowe
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Karsten75

Karsten75

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It seems a bit close for comfort.

I'm frankly surprised though. I would have thought 860W to be sufficient. Yea, bump it up to maybe 1000W or verify your numbers by running it through a few different calculators. Newegg also has a PSU calculator, for instance.
 
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Epsilon8425

Epsilon8425

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I checked using the newegg calculator and got 908w and re-checked with the other calculator mentioned above and got 828w (100% load, no-OC) so it looks like a 1000w psu would be best. What do you think of the CoolerMaster V1000 (if I'm not mistaken it is made by Seasonic)

Link: http://www.computerlounge.co.nz/components/componentview.asp?partid=20318

I could also go for the Seasonic SS-1000XP but it is more expensive and comes with ugly cables, but I guess thats just me being picky :p

Link: http://www.computerlounge.co.nz/components/componentview.asp?partid=16006
 
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iam2thecrowe

iam2thecrowe

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PSU calculators work by a recommendation, they are not quoting a peak power consumption figure. I would expect actual DC power consumption to be up to 600w under full load. 850w would be fine with overclocking, giving the psu some room to breathe, but as for upgradeability (like putting in a pair of r9 290's or gtx 780's) then yes maybe 1000w if you want to play it safe.
http://www.tomshardware.com/reviews/radeon-hd-7990-devil13-7970-x2,3329-12.html this gives you some kind of idea of power consumption you may expect (although not exact same gpu's you have but close)
 
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Epsilon8425

Epsilon8425

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So I've decided to go for a 1000w PSU to be safe however when I was looking at prices for the CoolerMaster v1000 (lowest $350 NZD incl. shipping) I also found the CoolerMaster v1200 Platinum at roughly $30 more ($380 NZD incl. shipping). Is it worth spending that extra on a completely overkill PSU to get the Seasonic XP2 (I think thats it) based psu with platinum rating, 7 year warranty (vs. 5 year of v1000), hybrid fan mode and more peripheral connectors (v1000 only has 4 connectors on 2 cables both of which will be used leaving none spare) or should I just go with the v1000 which will be more than enough for the foreseeable future?

Unfortunately the inwin ip-s350t1-0 is not available in NZ :(
 
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g-unit1111

g-unit1111

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That's honestly one of the worst PSUs on the market. It's made by a company called "Powerman" who is a not very well known OEM. You're better off going with an EVGA P2/G2 (Super Flower) or Corsair AXi (Flextronics G1) / HXi (Flextronics G2), or anything made by Seasonic. But really that's one of the worst that anyone can recommend.
 
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Karsten75

Karsten75

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The 1200W Coolermaster V1200 sounds like a really good deal. Edit. Check the length. Sometimes they get a bit longer and that makes them obscure fan ports or something on the bottom.

Ignore the Inwin recommendation. It's completely out of line.
 
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E

evanb3075

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Sorry about the in win my friend stole my phone and the 1200w sounds like a great deal .Edit. It's worth going for more wattage if you feel like it would help because you absolutely don't want to have under wattage
 
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Epsilon8425

Epsilon8425

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Well looks like I'm buying the v1200, the sale is just too good to pass up. I guess I won't be needing a new PSU for the next... um... ever :)

Thanks for all of your input everyone I really appreciate it.
 
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Epsilon8425

Epsilon8425

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1000w for 4 high end GPU's seems lower than I would have expected. I haven't purchased anything yet and was looking at prices/double checking other models just to be safe and noticed the v850 is also on sale for only $280 NZD. If a 1000w PSU can do 4-way Crossfire maybe 850w would be better for my build?

The difference between v1000 and v1200 wasn't much ($30) so I didn't really think it was worth purchasing the cheaper one but buying the v850 over the v1200 would be a pretty good saving (~ $100) if I could get away with it. Now I'm really confused :??:
 
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iam2thecrowe

iam2thecrowe

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It was puling 1100w at the wall, translate the efficiencies to the DC sid of the psu and its under 1000w (probably not much under), but you probably would not run it 24/7 or that psu wouldnt likely last long running near its max.i think if you can spring for a higher quality 850-900w, it would last longer than a cheaper quality 1000w. What outlet's can you buy from?
 
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Epsilon8425

Epsilon8425

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Mostly I buy from these stores:

http://www.computerlounge.co.nz/
http://www.pp.co.nz/

But I also use http://pricespy.co.nz/ to find products/prices in NZ, and will buy from anyone that has a good rating on that site.

The v series on sale was from http://www.pbtech.co.nz/
v850: http://www.pbtech.co.nz/index.php?z=p&p=PSUCLM5850&qr=pspy&ref=pricespy
v1200: http://www.pbtech.co.nz/index.php?z=p&p=PSUCLM51200&qr=pspy&ref=pricespy
 
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g-unit1111

g-unit1111

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It's not necessarily the higher wattage, it's the quality of the unit that's manufactured. You could have a 2000 watt PSU, if it uses under performing capacitors, it's going to fail every single time. It's about efficency as much as the PSU is well made - if you get a well made PSU it will last for years. The Cooler Master V series is a good choice as they're made by Seasonic. The In Win is not a good choice as it's made by a relatively unknown manufacturer. I recommend the EVGA P2s as they got one of the highest scores on Jonnyguru (the 1000W got a 9.7 / 10, the 1200W got a perfect 10/10).
 
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iam2thecrowe

iam2thecrowe

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going by pricing of the stores you have available, the coolermaster v1000 looks to be a good buy, gets great reviews and will have all the futureproofing you need for not much more cost than the 850w'ers. If you have the money available its your best bet. An 850w will work for that build no doubt, but doesnt give the future proofing a 1000w unit would in case you want to go with a pair of real high end gpu's one day.
 
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Epsilon8425

Epsilon8425

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Just bought the v1000, thank you very much for all of your help :)

 
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