Topic Title: Psu for 3x r9 290x
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Created On: 12/31/2013 07:17 AM
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 12/31/2013 07:17 AM
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djnocide
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I'm looking to build a new rig with 3 R9 290x, i know one r9 need around 300w. so if i do the math, i'll need at least a 900w psu with the rest of the rig needing around 200w (a guess), it would take me to a 1100w psu. I want to be safe so would it be better to get a 1200w or 1300w? Or 1100w will be enough?

 12/31/2013 07:51 AM
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zipsi
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If that 1100w psu is from a quality manufacturer, I don't see why it shouldn't work, but if its some noname chinese psu with 1100w written on it and actually having something like 700w, it will blow. Personally though, I would probably get a Seasonic X-1250 for this trifire solution just to give it some breathing space.



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Intel I7 3770K @ 4.5ghz, Cooler Master Hyper 212 Evo, Gigabyte Z77X-UD3H, Gigabyte HD7970 ghz edition, 4x4gb Kingston HyperX Beast 2133mhz, Seasonic Platinum 860, Samsung 840 Pro 256gb, OCZ Vertex 4 128gb, WD Black 1TB, WD Green 3TB+1.5TB, ASUS Xonar Essence ST, ASUS VE278Q, Windows 3.11
 12/31/2013 08:15 AM
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QB the Slayer
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Ahhhh... my dream PSU:

 

http://www.newegg.ca/Product/Product.aspx?Item=N82E16817139039

QB



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The MONSTER HTPC:

CPU: AMD FX-8350.||.Cooler: Corsair H80i
MB: Gigabyte 990FXA-UD7.||.RAM: 8 GB Mushkin Blackline DDR3 2000MHz (7-10-8-27-1T)
Case: CoolerMaster HAF 932.||.PSU: Corsair HX750
GPU:Asus R9 270X DirectCU II TOP.||.Audio: Creative X-Fi Titanium Fatal1ty Pro w/ Logitech Z-5300e (5.1, 280W-RMS)
System Drive: 2xSamsung 840 Pro 128GB RAID0.||.Working Drive: 2xMushkin Chronos 60GB RAID0

 12/31/2013 08:47 AM
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black_zion
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Seasonic $70 cheaper for negligible differences in efficiency that Zipsi recommended Though you will not get much boost over dual 290x as games still do not like more than 2 GPUs.

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ASUS Sabertooth 990FX/Gen3 R2, FX-8350 w/ Corsair H60, 8 GiB G.SKILL RipjawsX DDR3-2133, XFX HD 7970 Ghz, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, HP ZR2440w, Win 7 Ultimate x64
 12/31/2013 10:54 AM
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Vantharas
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http://www.newegg.ca/Product/Product.aspx?Item=N82E16817139039



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I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H110 :16GB Corsair Vengeance DDR-3 1600: XFX Radeon 7950 @ 1100/1575 : Corsair AX 860 PSU: x1 WD Black 1TB HDD's: 90GB Agility 3: 960GB SSD : Creative Labs X-FI:Corsair 500R Arctic White Edition:3 22inch Monitors Eyefinity @ 5294x 1050 : Alienware Tact-X Keyboard: Razer Naga :Corsair Vengence 1500 Headset: Corsair SP2500 Speakers

 12/31/2013 11:18 AM
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djnocide
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thanks for the answers, it help a lot . I found an EVGA http://products.ncix.com/detail/evga-supernova-1300g2-1300w-80plus-gold-fully-modular-power-supply-10yrs-warranty-73-85573-1360.htm This will probably do the job

 12/31/2013 02:31 PM
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black_zion
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I assume you are also going to liquid cool them?

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 12/31/2013 05:11 PM
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QB the Slayer
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Originally posted by: black_zion Seasonic $70 cheaper for negligible differences in efficiency that Zipsi recommended Though you will not get much boost over dual 290x as games still do not like more than 2 GPUs.

 

I would want the AX 1200i for the "i"....  the Corsair Link for the PSU is awesome! 

More than willing to fork over 70 more ducats for that

QB



-------------------------

The MONSTER HTPC:

CPU: AMD FX-8350.||.Cooler: Corsair H80i
MB: Gigabyte 990FXA-UD7.||.RAM: 8 GB Mushkin Blackline DDR3 2000MHz (7-10-8-27-1T)
Case: CoolerMaster HAF 932.||.PSU: Corsair HX750
GPU:Asus R9 270X DirectCU II TOP.||.Audio: Creative X-Fi Titanium Fatal1ty Pro w/ Logitech Z-5300e (5.1, 280W-RMS)
System Drive: 2xSamsung 840 Pro 128GB RAID0.||.Working Drive: 2xMushkin Chronos 60GB RAID0

 12/31/2013 07:47 PM
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djnocide
Peon

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Originally posted by: black_zion I assume you are also going to liquid cool them?

Would be better for the temp even with a good flowing case?

 12/31/2013 08:07 PM
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black_zion
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Stacking three OEM custom cooled 290Xs, which you will have to have, will cause a severe airflow restriction due to the very small air gap between cards 1 and 2, and 2 and 3, and also between 3 and the bottom depending on your case size and if you have a bottom or top mounted PSU. Also, if you're going to spend $1800 on graphics hardware, you should go ahead and spend the comparatively small cost to keep them as cool as possible, and so you can keep the Intel i7 you will also need at 5ghz or higher.

-------------------------
ASUS Sabertooth 990FX/Gen3 R2, FX-8350 w/ Corsair H60, 8 GiB G.SKILL RipjawsX DDR3-2133, XFX HD 7970 Ghz, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, HP ZR2440w, Win 7 Ultimate x64
 01/01/2014 07:07 AM
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djnocide
Peon

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Originally posted by: black_zion Stacking three OEM custom cooled 290Xs, which you will have to have, will cause a severe airflow restriction due to the very small air gap between cards 1 and 2, and 2 and 3, and also between 3 and the bottom depending on your case size and if you have a bottom or top mounted PSU. Also, if you're going to spend $1800 on graphics hardware, you should go ahead and spend the comparatively small cost to keep them as cool as possible, and so you can keep the Intel i7 you will also need at 5ghz or higher.

 

5ghz to not be restricted by the cpu in anything as i can understand, right? You got a really got point right there. thanks

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