PSU for gaming PC

[Spellbreak]

Hello,

I'm planning my first build and I have few questions about compatibility of the components. Here is the build.

Case: Cooler Master Full Tower Storm Stryker (Case has 4 build-in fans, if I'm not mistaken)
CPU Cooler: Corsair Hydro Series H100i
GPU: Asus GTX780TI-DC2OC-3GD5 (I'm planning to go SLI in future)
CPU: Intel® Core™ i7-4770K 3.5GHz 8MB LGA1150 BX80646I74770K
MB: Asus Maximus VII Hero
RAM: Kingston 16GB DDR3 PC12800 CL9 XyperX Beast KIT OF 2
SSD: 2x Samsung SSD 840 Pro 256GB SATAIII MZ-7PD256BW
OD: Asus Blu-ray Combo 12x SATA Retail BC-12D2HT/BLK/G/AS
PSU: Corsair AX860i ATX 2.31 860W 80+ Platinum

Alternative PSU: Seasonic X-850, 850W, 80+ Gold
If 850W not enough: Corsair 1000W, RM1000, 80+ Gold
Fractal Design ATX 2.31 Newton R3 1000W Black 80+ Platinum


So basically my concerns: what PSU will fit in that case and what power supply I would need to run this PC?

 

[cabudinen]

This Corsair AX860i ATX 2.31 860W 80+ Platinum, should be more than enough to power the GTX 780ti, its got all the requirements to make this card. It has 72A 12v rail and the card only needs 42A. On the other hand you might need the 1000w for SLI in the future. The PSU will fit no problem in that case. Good luck!

 

[i7Baby]

For a pc with a 780Ti in it you need a psu that will supply at leaqst 42A on the 12V rail and a total of 600W.

For gtx780ti in SLI, you need 2 x 42A on the 12V rail and a total of 950W

Ues a psu from Tier One - to protect your investment - http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html#13224310

eg EVGA Supernova, Corsair AX 1200, Seasonic X1050, etc, etc

 

[Eduello]

For a pc with a 780Ti in it you need a psu that will supply at leaqst 42A on the 12V rail and a total of 600W.

For gtx780ti in SLI, you need 2 x 42A on the 12V rail and a total of 950W

Ues a psu from Tier One - to protect your investment - http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html#13224310

eg EVGA Supernova, Corsair AX 1200, Seasonic X1050, etc, etc

You can't actually calculate it like that. The 42A is the amperage that's required to run everything on the 12 volt rail.
A more accurate calculation would be 42A*12V+250W (TDP from Nvidia's site) = 754W.

Based on that, a 850W should be plenty. The AX860i is one of the best PSUs out there, I recommend you to stick with that.

 

[Ninjamilez]

I've been told that for dual-SLI GTX 780 Ti an 860w power supply is enough, even for over-clocking.

I'm planning on getting the non-'i' variant of the Corsair AX850 and my build is going to be very similar to yours, except I'm going to wait for Maxwell and Broadwell since I was planning on building towards the end of the year. They should also be more efficient than Kepler and Haswell.

If you're curious, this is my current plan:

Case: Corsair Vengeance C70 (w/ 7 PWM fans)
CPU Cooler: Thermalright Silver Arrow SB-E Extreme
GPU: Reference Maxwell 880 dual-SLI (w/ after-market cooler)
CPU: Intel® Core™ i5/i7 Over-clocked ~4.6GHz (if possible)
MB: ASUS Z97 Pro Wi-Fi AC
RAM: G.Skill RipjawsX 2x8GB 1866MHz CL10
HDD: Seagate Barracuda 1TB 7200RPM
SSD: Samsung 840 EVO 250GB
OD: Generic Samsung 18x DVD ROM
PSU: Corsair AX860 860W 80+ Platinum

 

[i7Baby]

Or 600W plus another card tdp = 850W?

 

[Eduello]

Or 600W plus another card tdp = 850W?

Well the 600W includes the speculated power draw of the entire system (RAM, HDDs etc) while the 42A is only for the 12V rail.

The point is, the recommendations are always more or less overkill. 860W should be fine, especially since these are some of the best power supplies on the market we are talking about.

 

[cabudinen]

*grabs popcorn*

 

[i7Baby]

Got any links that will help? I use realhardtech mainly

 

[Eduello]

*grabs popcorn*

Well I'm not trying to turn this into a flame war...

Got any links that will help? I use realhardtech mainly

I use whatever Google can find as long as the site is not completely unknown.
http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_review,4.html

"System Wattage with GPU in FULL Stress = 617W" Add ~100W for everything else at full stress and you've got something like 720W.

 

[Ninjamilez]

Got any links that will help? I use realhardtech mainly

Here are some forums to read up on:

http://www.overclock.net/t/1471448/psu-for-gtx-780ti-maybe-sli
http://www.tomshardware.co.uk/answers/id-2054130/psu-dual-gtx-780ti-superclocked-sli.html

Also have a look at some PSU calculators. Definitely do a few of them since some of them might not be as accurate.

 

[i7Baby]

Those links don't help. There's no methodology, just guesswork.

Calculators only work if the OP plugs in every bit with the pc.

 

[Ninjamilez]

Those links don't help. There's no methodology, just guesswork.

Calculators only work if the OP plugs in every bit with the pc.

I'm not particularly experienced with PSU requirements because I've not been building very long. Those were just forums that I had a look at as a starting point.

With the calculators, that's why I said to do a few of them. When I used them the results varied by about 150 watts in some cases.

 

[Spellbreak]

I've been told that for dual-SLI GTX 780 Ti an 860w power supply is enough, even for over-clocking.

I'm planning on getting the non-'i' variant of the Corsair AX850 and my build is going to be very similar to yours, except I'm going to wait for Maxwell and Broadwell since I was planning on building towards the end of the year. They should also be more efficient than Kepler and Haswell.

If you're curious, this is my current plan:

Case: Corsair Vengeance C70 (w/ 7 PWM fans)
CPU Cooler: Thermalright Silver Arrow SB-E Extreme
GPU: Reference Maxwell 880 dual-SLI (w/ after-market cooler)
CPU: Intel® Core™ i5/i7 Over-clocked ~4.6GHz (if possible)
MB: ASUS Z97 Pro Wi-Fi AC
RAM: G.Skill RipjawsX 2x8GB 1866MHz CL10
HDD: Seagate Barracuda 1TB 7200RPM
SSD: Samsung 840 EVO 250GB
OD: Generic Samsung 18x DVD ROM
PSU: Corsair AX860 860W 80+ Platinum

First of all thanks everyone for the help! I'll probably stick with AX860i if it would be enough for overclocked SLi in the future.

Eduello, I have a question for you regarding GPU. You are planning to wait for 880 - is it worth it? I mean if the difference will be sufficient to wait for it or not really? And what about approximate price?

 

[Eduello]

@Spellbreak: Well my plan ATM is to wait for the GTX 8** equivalent of my card. When that comes out I'll buy a second GTX 760 since the price is probably going to drop.

The price of the GTX 880 will probably be around the current price of the 780Ti. I'm not so sure waiting would be a great idea in your case since it might be that the 8** cards won't be released before early 2015. Of course this is all just speculation so take it with a grain of salt.

 

[Ninjamilez]

I've been told that for dual-SLI GTX 780 Ti an 860w power supply is enough, even for over-clocking.

I'm planning on getting the non-'i' variant of the Corsair AX850 and my build is going to be very similar to yours, except I'm going to wait for Maxwell and Broadwell since I was planning on building towards the end of the year. They should also be more efficient than Kepler and Haswell.

If you're curious, this is my current plan:

Case: Corsair Vengeance C70 (w/ 7 PWM fans)
CPU Cooler: Thermalright Silver Arrow SB-E Extreme
GPU: Reference Maxwell 880 dual-SLI (w/ after-market cooler)
CPU: Intel® Core™ i5/i7 Over-clocked ~4.6GHz (if possible)
MB: ASUS Z97 Pro Wi-Fi AC
RAM: G.Skill RipjawsX 2x8GB 1866MHz CL10
HDD: Seagate Barracuda 1TB 7200RPM
SSD: Samsung 840 EVO 250GB
OD: Generic Samsung 18x DVD ROM
PSU: Corsair AX860 860W 80+ Platinum

First of all thanks everyone for the help! I'll probably stick with AX860i if it would be enough for overclocked SLi in the future.

Eduello, I have a question for you regarding GPU. You are planning to wait for 880 - is it worth it? I mean if the difference will be sufficient to wait for it or not really? And what about approximate price?

I'm not Eduello, but I'll answer the question anyway.

We don't know what the price will be for the 880 but I have read in places that they might be around $550.

According to the rumours it might be about 10% faster than the 780 Ti and have 8GB GDDR5.

http://videocardz.com/nvidia/geforce-800/geforce-gtx-880
http://www.legitreviews.com/let-nvidia-geforce-gtx-880-8gb-video-card-rumors-commence_141231

 

[Dark Lord of Tech]

For 2 - 780ti's go to 1000w , here's a great deal on one of the best on the market.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: EVGA SuperNOVA 1000G2 1000W 80+ Gold Certified Fully-Modular ATX Power Supply ($149.99 @ Newegg)
Total: $149.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-26 09:28 EDT-0400)


Tier 1 Brands - The Most Powerful And Stable Components On The Market.

Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2

 

[Spellbreak]

Thank you Eduallo and Ninjamilez.

@SR-71 Blackbird, I'm from Latvia, Riga and prices here are higher that at US market and variety of the components is also limited. Several times I tried to order some components from amazon and other similar distributors, but they apply shipping and high taxes.

For example, build which I what to get will be 2082.28 EUR (~2839.40 USD) it's already quite expensive for me So ordering from abroad not an option for me at the moment.

 

[Ninjamilez]

Tanks you Eduallo and Ninjamilez.

@SR-71 Blackbird, I'm from Latvia, Riga and prices here are higher that at US market and variety of the components is also limited. Several times I tried to order some components from amazon and other similar distributors, but they apply shipping and high taxes.

For example, build which I what to get will be 2082.28 EUR (~2839.40 USD) it's already quite expensive for me So ordering from abroad not an option for me at the moment.

In that case, I can't really help you very much. I don't know what components you have available to you.

Good luck with the build, though.

 

[Eduello]

Yeah, good luck with the build . Feel free to ask if you have any additional questions.

 

[Dark Lord of Tech]

http://ma1.lv/goods.asp?id=yzKgq+barosanas+bloks+1000w+atx+12cm+supernova+evga+120-g2-1000-xr

http://ma1.lv/goods.asp?id=9XXb6+barosanas+bloks+1250w+atx+13+5cm+pro+series+xfx+p1-1250-befx

 

[Spellbreak]

Ok, thanks again guys But there are still 2 opinions about PSU - 1000w or 850-860W. I'm not hardcore over-locker btw.

 

[Dark Lord of Tech]

I'd go with 1000w for 2 - 780ti's.

 

[Eduello]

Ok, thanks again guys But there are still 2 opinions about PSU - 1000w or 850-860W. I'm not hardcore over-locker btw.

Well I'd personally be OK with a quality 850W PSU, but I think you should listen to SR-71 Blackbird since he undoubtedly has more experience in matters like this.

 

[Ninjamilez]

I'd go with 1000w for 2 - 780ti's.

What's the reasoning for the 1000w? Woudln't an 850w 80+ Platinum PSU be enough?

I'm not saying you're wrong. I'd just like to know because I'm planning on building a system similar to this but with two Maxwell 880s, when they're out, and a Broadwell i5 when that's released.