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PSU for SLI

MD_killstreak
By MD_killstreak
in Power Supplies
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Go to solution Solved by lvh1,

According to this http://www.tomshardware.com/reviews/geforce-gtx-760-review-gk104,3542-22.html GTX760's use only 160 Watt at most so you'll be more than fine

Posted

Hi! so I'm building a new gaming pc which components are the following: 

MOBO: Asus maximum hero VII

Intel I5 4670K

16 gb RAM 1600 mHz

 2 Nvidia 760 gtx 2 gb (gigabyte)

cooler master hyper 212 EVO.

 

all powered by a PSU Cooler master GX II 750 w.

 

I've been searching and seems that i can't really find the real wattage i would need to power this stuff.

 

the real cuestion is: would it be enough to power the two GPU in SLI mode?

 

(i'm not able to acquire another brand of psu) 

 

 

So, thanks! =)

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Yes, you will be fine.

CPU Intel Core i7-4790K Motherboard ASUS Saberthooth Z97 Mark1 RAM Corsair Dominator Platinum 16GB @ 2133MHZ GPU 2 X MSI GeForce GTX GTX 980TI GAMING 6G SLI Case Phantex Enthoo Evolv ATX Storage Samsung 840 Pro Series 256GB / Western Digital Caviar Black 2TB PSU Corsair RM1000i Display Asus 4K PB287Q Cooling Noctua NF-A14 FLX & NF-F12 PWM /Thermaltake Water 3.0 Ultimate 360mm Keyboard Corsair K70 Mouse ROCCAT Kone XTD Sound Card Asus Xonar STX

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actually you can get the gold certified 650W , it's already enough for SLI 760. 

but of course 700W will gives more headroom for upgrading

CPU: Intel i5-4670K CPU Cooler: Swiftech H240-X Motherboard: ASUS Z97 Sabertooth Mark 1 Memory: Corsair Vengeance Pro 1866MHz 16GB Storage:  Samsung 850 evo 250GB ,1TB WD BLUE, Seagate Barracuda 2TB GPU: ASUS STRIX GTX970 4GB Case: Fractal Design Define R5 PSU: Corsair AX760 Full Modular Monitor: Dell 23" S2340L IPS Keyboard: Corsair Strafe RGB Mouse: Logitech G502(w/ Mi Metal Mousepad) Headphone: Audio Technica ATH-M50/MSR-7 Speaker: Edifier Studio 7 R2730DB

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The 750 Watts is just fine for this system!

 

I measured how much power my pc (with 1 GTX780 TI) draws out the wall when it's under full load with all my OCing... just 438 Watts and the GTX 760 doesn't need that much juice :).

 

Intel i7 7820X (delidded) @ 4.9GHz - MSI X299 M7 ACK + EKWB Fullcover Block - G.Skill Trident Z 32GB @ 3466MHz - nVidia Titan Xp + EKWB Fullcover Block @ 2.1GHz - Samsung 960Pro 2x - WDD Blue 2TB - Seasonic 750W Platinum - modded Corsair 600C - Hardtubed Custom Watercooling

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Yes that PSU is enough but I stronly urge you to drop the 2 760s and get a single 780 or r9 290. A single GPU settup will always be more stable in more games then a SLI or crossfire setup. Yes it will look cool but it will not be cool when your SLI setup messes with your game performance in all the wrong ways.

My Rig "Corsair air 540, MSI Z87-G45, i5 4670k, EVGA ACX 780, Gskill sniper 2x8gb 1866 memory, Corsair CX500m modular 80+ bronze, corsiar h100i, toshiba 1.5tb HDD." / Peripherals "Acer H226HQLbid Black 21.5" (Main monitor), Acer S200HLAbd Black 20" (auxiliary), Razer blackwidow ultimate 2013, razer naga 2013, razer goliathus 444x355 speed edition, Sennheiser HD8 DJs"

 

 

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Hi! so I'm building a new gaming pc which components are the following: 

MOBO: Asus maximum hero VII

Intel I5 4670K

16 gb RAM 1600 mHz

 2 Nvidia 760 gtx 2 gb (gigabyte)

cooler master hyper 212 EVO.

 

all powered by a PSU Cooler master GX II 750 w.

 

I've been searching and seems that i can't really find the real wattage i would need to power this stuff.

 

the real cuestion is: would it be enough to power the two GPU in SLI mode?

 

(i'm not able to acquire another brand of psu) 

 

 

So, thanks! =)

I went with that PSU, with 2 R9 280X AMD video cards, and blew it up in 48 hours.  Didn't damage anything other than killing the PSU, but POW a loud electric snap and it was RIP.  AMD recommended 600w for a single R9 280X, and I thought id be fine with 2 cards in crossfire.  After having that happen with brand new hardware, my 2 card minimum is now 850.  If you ever plan on upgrading down the road, mise well get 1000-1200 if its not too much more $$$ sometimes its only a few bucks(price difference between my 1000 and 1300 was $4.00 pissed I didn't realize and just grab 2 1300s).  If you computer doesn't need the power, it simply won't use it, so its not like you will be wasting electricity.  Just my 2 cents. 

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I went with that PSU, with 2 R9 280X AMD video cards, and blew it up in 48 hours.  Didn't damage anything other than killing the PSU, but POW a loud electric snap and it was RIP.  AMD recommended 600w for a single R9 280X, and I thought id be fine with 2 cards in crossfire.  After having that happen with brand new hardware, my 2 card minimum is now 850.  If you ever plan on upgrading down the road, mise well get 1000-1200 if its not too much more $$$ sometimes its only a few bucks(price difference between my 1000 and 1300 was $4.00 pissed I didn't realize and just grab 2 1300s).  If you computer doesn't need the power, it simply won't use it, so its not like you will be wasting electricity.  Just my 2 cents. 

Yeah you need 850-1000 minimum for to 280x's xD

My Rig "Corsair air 540, MSI Z87-G45, i5 4670k, EVGA ACX 780, Gskill sniper 2x8gb 1866 memory, Corsair CX500m modular 80+ bronze, corsiar h100i, toshiba 1.5tb HDD." / Peripherals "Acer H226HQLbid Black 21.5" (Main monitor), Acer S200HLAbd Black 20" (auxiliary), Razer blackwidow ultimate 2013, razer naga 2013, razer goliathus 444x355 speed edition, Sennheiser HD8 DJs"

 

 

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No you don't. A 750W psu is fine for 280X crossfire, as long as it is a decent one i.e Seasonic, Superflower, Antec etc.

Yeah but I usually like to recommend a slightly over kill PSU because the peak efficiency for most PSUs is around that 50-80% usage mark. 

My Rig "Corsair air 540, MSI Z87-G45, i5 4670k, EVGA ACX 780, Gskill sniper 2x8gb 1866 memory, Corsair CX500m modular 80+ bronze, corsiar h100i, toshiba 1.5tb HDD." / Peripherals "Acer H226HQLbid Black 21.5" (Main monitor), Acer S200HLAbd Black 20" (auxiliary), Razer blackwidow ultimate 2013, razer naga 2013, razer goliathus 444x355 speed edition, Sennheiser HD8 DJs"

 

 

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No you don't. A 750W psu is fine for 280X crossfire, as long as it is a decent one i.e Seasonic, Superflower, Antec etc.

You really want to run over wattage, constantly stressing out your PSU, just because you bought a nice brand?  Its not that much more for more wattage. I'm afraid I'm going to have to disagree with your feelings that it will be "okay".  Mine was a Corsair PSU, not some cheap POS.  Right on the box for the R9 280X says "Required 600W, needs 1 150W 8 pin connector and 1 75W 6 pin connector".  Now thats 225watts plus you can get 75w+ from the PCIe slot, that's 300W.  Now if its requires 600Watts for the system plus the 1st card, and the cards have a potential TDP of 300W.  Thats a potential of 900Watts.  750 is just not enough even for a Platinum PSU, that's only giving the second card 150 watts more than the manufacturers requirement.  I pretty much proved it by blowing mine up after 2 days.  If your PSU is THIS close to BLOWING UP, and the only thing separating it is BRAND of PSU as you might argue, than spring the extra money and get an extra 100-200 watts.  Do you really want to run OVER the wattage of your PSU just because you bought a nice brand?  The nicest brand will eventual go POP under constant stress.

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You really want to run over wattage, constantly stressing out your PSU, just because you bought a nice brand?  Its not that much more for more wattage. I'm afraid I'm going to have to disagree with your feelings that it will be "okay".  Mine was a Corsair PSU, not some cheap POS.  Right on the box for the R9 280X says "Required 600W, needs 1 150W 8 pin connector and 1 75W 6 pin connector".  Now thats 225watts plus you can get 75w+ from the PCIe slot, that's 300W.  Now if its requires 600Watts for the system plus the 1st card, and the cards have a potential TDP of 300W.  Thats a potential of 900Watts.  750 is just not enough even for a Platinum PSU, that's only giving the second card 150 watts more than the manufacturers requirement.  I pretty much proved it by blowing mine up after 2 days.  If your PSU is THIS close to BLOWING UP, and the only thing separating it is BRAND of PSU as you might argue, than spring the extra money and get an extra 100-200 watts.  Do you really want to run OVER the wattage of your PSU just because you bought a nice brand?  The nicest brand will eventual go POP under constant stress.

A 280X won't pull anywhere near 750W, so you are talking complete nonsense. Like I said, a good quality 750W power supply will run a 280X crossfire setup without any issues.

 

Just to prove my point : http://www.tweaktown.com/reviews/5826/msi-radeon-r9-280x-3gb-twin-frozr-oc-in-crossfire-video-card-review/index23.html

 

As you can see, it pulls less than 600W and that is with a power hungry i7 3960X EE @ 4.7GHz (The system spec is on page 3)

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