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750W enough for crossfire?

Jrobertson
By Jrobertson
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Yes, but cutting it a bit close, i think

CPU - Intel 4670k  Motherboard - Gigabyte GA-Z87X-D3H  RAM - Kingston HyperX 8GB  GPU - EVGA 780  Case - Fractal Design Define R4    Storage - 2TB WD Black, Samsung 840 Evo 128GB     PSU - Corsair RM650  Display -  Benq XL2430T and Acer S235HL  Cooling - CM Hyper 212 Evo  Keyboard - Corsair K95  Mouse - Razer Deathadder  Sound - Sennheiser HD 558                                 Mic - Blue Snowball  Phone- OnePlus One  Tablet - Nvidia Shield

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Cutting really close with 750watts. Try to go for 850watts to make leeway for overclocking both GPU and CPU

My internet Speed:http://www.speedtest.net/my-result/3079506526 My Build:http://linustechtips.com/main/topic/80331-the-avenging-dragon-first-build/

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Cutting really close with 750watts. Try to go for 850watts to make leeway for overclocking both GPU and CPU

Should i get this?http://www.amazon.com/Corsair-Enthusiast-Certified-Compatible-platforms/dp/B004MYFODS/ref=sr_1_1?ie=UTF8&qid=1386415335&sr=8-1&keywords=850+watt+power+supply

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For a bit more you can get an 80+ gold and fully modular power supply http://www.amazon.com/Corsair-Series-80PLUS-Gold-Certified-Supply/dp/B00EB7UIXM/ref=sr_1_1?ie=UTF8&qid=1386415533&sr=8-1&keywords=corsair+rm+850

My internet Speed:http://www.speedtest.net/my-result/3079506526 My Build:http://linustechtips.com/main/topic/80331-the-avenging-dragon-first-build/

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Depends on what other components you use but most likely yes.

Even though the 290 is a very power hungry card, it still only use about 250 watts in worst case scenarios. So for two GPUs that's 500W. That leaves you with 250 watts for the CPU, mobo and the rest of the system. If you got for example an Intel CPU then that will use less than 100W, your motherboard won't use more than like 20 watts, HDD/SSD/fans etc becomes maybe 30 watts, and you got about 100 watts to spare. It is cutting it a bit close though since those 290s uses so damn much power.

 

It's worth noting that the numbers I am quoting (taken from Anandtech, TechPowerUp and a few other sites) are not only worst case scenarios, but also measured in AC wattage, and your PSU is rated for DC wattage, so assuming you got a high quality PSU you will have even more headroom (if it's 80+ then you will have about 20% more headroom).

 

If you got an AMD processor and is thinking of overclocking then I am not sure if 750W is enough. With an Intel processor it should be enough though.

 

Edit: Forgot to say, don't cheap out on your PSU. Get a high quality one. Brands like Rosewill might say they are rated for let's say 750W but they might just be lying, and the PSU will break if you put more than 500W on it. Oh and if it breaks, there is a risk that it will kill all other components as well. Get a PSU that is a rebranded Seasonic unit. XFX, most Corsair and a lot of Antec PSUs are rebranded Seasonic units.

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Im a bit of noob, but whats the difference

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Get this. http://www.amazon.com/SilverStone-ATX12V-EPS12V-Silver-ST85F-P/dp/B00307RLZW/ref=sr_1_1?ie=UTF8&qid=1386415722&sr=8-1&keywords=silverstone+strider+plus+850

 

Never heard of issues with Strider Plus PSUs, but Corsair tends to use as low quality components as possible without making them bad units.... 

Current rig: i5 4670K | GTX 670 | Asus Z87I-Pro | Silverstone Strider Plus 600W | Custom mITX case | Seagate Barracuda 3TB | Samsung 840 120GB | G430 | CM Storm Quickfire Pro - MX Red | LG 21.5"

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The PSU I linked and the PSU you linked.

The one that you listed was 80+ bronze vs 80+ Gold. That power supply that you listed is non modular.

My internet Speed:http://www.speedtest.net/my-result/3079506526 My Build:http://linustechtips.com/main/topic/80331-the-avenging-dragon-first-build/

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Its not that big of a difference. But if you do like cable management then so be it.

My internet Speed:http://www.speedtest.net/my-result/3079506526 My Build:http://linustechtips.com/main/topic/80331-the-avenging-dragon-first-build/

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Ok, but is the difference that drastic?

 

In the grand scheme of things, not really. If the 80+ Gold costs considerably more, the cost difference won't offset the money you save on energy for a long time. If the price difference isn't too great, go for 80+ Gold or Platinum. Otherwise. a quality 80+ Bronze unit is good.

 

 

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Get this. http://www.amazon.com/SilverStone-ATX12V-EPS12V-Silver-ST85F-P/dp/B00307RLZW/ref=sr_1_1?ie=UTF8&qid=1386415722&sr=8-1&keywords=silverstone+strider+plus+850

 

Never heard of issues with Strider Plus PSUs, but Corsair tends to use as low quality components as possible without making them bad units.... 

 

+1 for this, no issues with mine :)

 

except that blue plastic....

Check out the build: Used to be Obot, now Lilith

Shameless: Me

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Is 750w enough for 290 crossfire?

Recommend is 800w with 290 CFX. 

|CPU: Intel 5960X|MOBO:Rampage V Extreme|GPU:EVGA 980Ti SC 2 - Way SLI|RAM:G-Skill 32GB|CASE:900D|PSU:CorsairAX1200i|DISPLAY :Dell U2412M X3|SSD Intel 750 400GB, 2X Samsung 850 Pro|

Peripherals : | MOUSE : Logitech G602 | KEYBOARD: K70 RGB (Cherry MX Brown) | NAS: Synology DS1515+  - WD RED 3TB X 5|ROUTER: AC68U

Sound : | HEADPHONES: Sennheiser HD800 SPEAKERS: B&W CM9 (Front floorstanding) ,  B&W CM Center 2 (Centre) | AV RECEIVER : Denon 3806 | MY X99 BUILD LOG!

 

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+1 for this, no issues with mine :)

except that blue plastic....

The blue plastic is great for blue/black themed builds.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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