Would a Corsair HX750/CM800PROGOLD be enough to power 770 sli ?

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wakoavo

wakoavo

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Hi, my question is quite simple, would a Corsair HX 750w (PS-C750HXGM) be a good power supply for "future proofing" ? I`m buying an NVIDIA gtx 770 (MSI gamer edition) and would like to know if this power supply would be powerful enough to possibly power 2x 770`s in the future ?

Here is my system:
i7 2600k(stock)
8gb ddr3 1333
2x 80GB
2x 500GB
Intel extreme burrage
Coolermaster CM690 case
7x 120mm case fans

my other choices would possibly be:
Coolermaster PRO GOLD 800w (Less expensive, has a 5year warranty)(CM-SPG800)
Corsair GS800w (Least expensive, 5 year warranty)(PS-C800GST)
note:
The HX750 has a massive 7 year warranty, the Coolermaster 5.
The HX850 is not in my budget, prices here are ridiculous.

Any advice would be awesome thanks :), I`m buying my 770 this week, and would like to get a PSU asap.

PS: I also read up about AMP ratings of the PSU`s and was wondering if anyone could shed some light, if you power 2x 770s, what AMP rating would you need ? Can`t seem to find any info about amp ratings for SLI setups.

EDIT: forgot to tick "request solutions to this question"
EDIT: Can`t convert to question(browser bug), messaged someone to fix it, will set "best answer" tomorrow after work.
 
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toyftw
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toyftw

toyftw

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Hi - I wouldn't risk it. You might have enough +12v amps to run the system in SLI,
but realhardtechx (their expertise) recommends an 850w unit for a system
running 2 - 770's in SLI.

 
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wakoavo

wakoavo

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- Hi - I wouldn't risk it. You might have enough +12v amps to run the system in SLI,
- but realhardtechx (their expertise) recommends an 850w unit for a system
- running 2 - 770's in SLI.

Im wondering if the 800w Coolermaster would be fine running this kind of setup ? Please someone slap me with some info :p
 
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toyftw

toyftw

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Hi - which Coolermaster (model #)? CM has a few decent PSU's out there, but a
lot of bad PSU's as well.

 
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Sn1992-1361850

Sn1992-1361850

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For a system using two NVIDIA reference design GeForce GTX 770 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 45 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

For Factory Overclocked GeForce GTX 770 graphics cards: A minimum 700 Watt or greater system power supply with a maximum combined +12 Volt continuous current rating of 51 Amps or greater and with at least four 6-pin PCI-E Supplementary Power Connectors.



Cm 800 gold come with 65a current - gold efficiency-modular

Gs800 2013 edition gives 65a also -bronze efficiency-non modular


Hx 750 with 62a current with silver efficiency- modular




If i wud have to pick n budget was not a constraint i wud pick cm 800 gold


Hope u found this helful
U can close d post if sattisfied by selecting best answer
 
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wakoavo

wakoavo

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This is exactly what I needed to know :), thanks a bunch for your reply !
 
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wakoavo

wakoavo

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The Coolermaster SILENT PRO GOLD 800w, as previously mentioned ;). (CM-SPG800)
 
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toyftw

toyftw

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except that's not correct;

For a system using two GeForce GTX 770 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 850 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 62 Amps or greater and that has at least two 6-pin and two 8-pin PCI Express supplementary power connectors.
 
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wakoavo

wakoavo

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strange, replying to my own thread xD

I found this:
"If you’re looking for quality PSU to power a rig featuring one high-end graphics card, such as GTX 480 or Radeon HD 5870, then you’ll really like Silent Pro 800W Gold. However, if you’re looking to add SLI or CrossFire to your rig, you’ll probably have to reach for the more powerful models in the Silent Pro Gold series. As for our today’s sample, the Silent Pro 800W Gold is efficient and we have no choice but to recommend it."

from: http://www.fudzilla.com/home/item/19112-coolermaster-silent-pro-gold-800w/19112-coolermaster-silent-pro-gold-800w?showall=1

So would that mean I have to look at another PSU ? :(
If someone could tell me for sure if the CM800WPROGOLD could run my setup with no worries, I would appreciate it :)
PSU calculators keep telling me 800w or 850w, most 850 though.
It IS better to be safer, but if it could handle it, I would be very happy. It is only 50w after all xD
Also, Coolermaster states that the PSU`s max wattage is 960, which makes me feel more safe about the "50w difference".
I would appreciate an expert opinion and advice please :D
 
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toyftw

toyftw

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Hi - Yes the cm800 gold will run your setup. But, if you look at nvidia recommendation
of 62 +12v amps you will see that the CM800 has 65 and will run the system.
However, that doesn't leave a whole lot of room for headroom & overclocking,
which is why 850 is generally recommended.
 
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wakoavo

wakoavo

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- Hi - Yes the cm800 gold will run your setup. But, if you look at nvidia recommendation
- of 62 +12v amps you will see that the CM800 has 65 and will run the system.
- However, that doesn't leave a whole lot of room for headroom & overclocking,
- which is why 850 is generally recommended.

Thank you for your reply :), I did some further digging on the local sites and found this: (CM-SPH850) Coolermaster 850w Silent Pro Hybrid. It has 70amp, 850watts, GOLD certified, modular. It is a bit more expensive, but much cheaper than the Corsair HX850. Im thinking this PSU is my saving grace xD


- With the higher end cards , I tend to push the recommended power , to protect the consumer.

Yeah, it is always better to play it safe. Thank you for your reply :).

 
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toyftw

toyftw

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Gr8 - enjoy your new rig!

 
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wakoavo

wakoavo

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Hi guys, just an update:

I ended up buying the Inno3D 770 and Seasonic X-850. I was browsing around and found the Seasonic on special ( -20%).

that's the good news...

the bad news, the PSU seems to have a really bad coil whine. I can clearly hear it sitting normally at my pc. I can even hear it with the power off. When I unplug the PSU or switch it off at the wall-plug, the sound "bounces" and the pitch gets higher and higher till the power is out of the system (all the LED`s on the mobo switch off).
I swapped out my old graphics card and the coil whine got much softer. The older card is a 8600 that barely uses any power. So I guess the coil whine has something to do with the powerdraw of the system ? If I'm bothering you guys asking it here after all this time, ill start a new thread. :)
 
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toyftw

toyftw

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Ah - gr8 find on the PSU, I'm aiming for that on my next build, have the x-650 now and it's gr8.

Sorry, I haven't experienced any coil whine, so don't know how to help you there.

 
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