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How many watts should i get?

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a b ) Power supply
February 29, 2012 1:03:47 AM

hey, im planning on getting these

gtx 560 sli
msi h67 mobo
7200 RPM sata2 500gb
dvd/cd combo drive
i5 2500k
4 120MM fans
2X4gb ddr3 1333

how many watts should i get? around just over 600? please only answer if you have had a similar setup. ive had "professionals" tell me i need 800W. :lol: 

ive checked multiple psu calculators, they suggested 575-625 with overclocked cpu and gpu with 10% aging capacitors. sorry for my grammer, im pretty drunk.

thanks

More about : watts

a b ) Power supply
February 29, 2012 1:30:52 AM

A 560 GTX in SLI (in other words more than one) will need at least 800 W. But if you really mean that you are only running a single GPU then 600 W is fine.

Why would you get an H67 to run a 2500K? The H67 doesn't allow you to OC the CPU, and you would be better off with a non-K chip on that platform.

Buy a quality PSU from Antec, Corsair, Seasonic, PCP&C, OCZ, etc. Skimping on a PSU will hurt your other components, and if you buy quality you can keep it for successive rigs.

a b ) Power supply
February 29, 2012 2:17:16 AM

600W should work fine. even a good 500W should be OK. For SLI, 750W+.

^ Agree with the CPU + Mobo. Either get a i5 2400 + H67 or i5 2500k + Z68.
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a c 1098 ) Power supply
February 29, 2012 3:52:15 AM

For a system using two GeForce GTX 560 Ti graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater power supply that has a combined +12 Volt continuous current rating of 52 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

To handle the overclocking of the CPU and GPUs add at least another 10 Amps to the +12 Volt continuous current rating.

You're going to need a P67 or Z68 chipset motherboard if you're planning on doing any real overclocking of the i5-2500K.
a b ) Power supply
February 29, 2012 12:21:12 PM

ive got the amps down, im just wondering about the watts. how come i would need 600W for a single 560 ti? the 560 ti uses a max of 170W. 170X2=340. how come so many PSU calculators are suggesting 625 max for sli when you guys are saying that for one?
a b ) Power supply
February 29, 2012 12:27:10 PM

i REALLY doubt the rest of my rig is going to use 430W. for 4 fans, mobo, HDD, CPU and RAM. and sorry i did mean P67 i just noticed now that i wrote H67 :lol:  hooray for alcohol -.-
a b ) Power supply
February 29, 2012 12:49:38 PM

the online calculators are the true 'minimum' requirements. However, this will not leave any room for overclocking, or future additions so you always want to pad your numbers by 50-100W to leave space for future upgrades and overclocking. Also, get a power supply that is at minimum 80+ Bronze. Not such a concern of efficiency as much as they tend to be better quality (though I should note I saw a 10% use drop in my power bill moving from a C2Duo+9800GT to an i7+GTX570 which I attribute to the lower idle usage, and the efficient power supply).

Check your motherboard, I love MSI but a lot of their lower end motherboards are xFire only and do not support SLi. Also as others mentioned: H61/67 does not allow for overclocking, so if you really like that motherboard then save a few $ and stick with the i5 2400. If you want the overclocking of the 2500K then pick either a high end p67 ($90+ before rebates), or a quality entry level z68. Also, be sure to get a motherboard with UEFI instead of BIOS (sometimes referred to as touch BIOS) for future OS compatibility.

If you get a quality case you will not need those extra 120mm fans as the case will come with some pre-installed. The only time you should need that extra airflow is if you have coolers that exhaust into the case instead of exhausting out the back.
February 29, 2012 12:51:33 PM

lol

get a 750w 80+ silver or gold
a 850 w if oc
check for amps
a c 80 ) Power supply
February 29, 2012 2:04:22 PM

170W? That sounds like the TDP for the GTX560TI. The GTX570 is a 220W part.

http://www.guru3d.com/article/geforce-gtx-570-review/2

Quote:
GeForce GTX 580 : 512 SP, 384-bit, 243W TDP
GeForce GTX 570 : 480 SP, 320-bit, 219W TDP
GeForce GTX 480 : 480 SP, 384-bit, 250W TDP
GeForce GTX 470 : 448 SP, 320-bit, 225W TDP


You are looking at 440W for the GPUs, more if you are buying OC'd versions. Lets say 450W for the sake of easy math. Toss in another 100W for a stock CPU and 50W for everything else, and you need a PSU that can output AT LEAST 600W on the 12V rail. If you will be using any OC'd parts, you'll need more. This is why you need a 750W or better for SLI GTX570s.

Drinking is fun, but don't forget to double check your math when you sober up.

Edited for spelling.
a b ) Power supply
February 29, 2012 7:16:19 PM

4745454b said:
170W? That sounds like the TDP for the GTX560TI. The GTX570 is a 220W part.

http://www.guru3d.com/article/geforce-gtx-570-review/2

Quote:
GeForce GTX 580 : 512 SP, 384-bit, 243W TDP
GeForce GTX 570 : 480 SP, 320-bit, 219W TDP
GeForce GTX 480 : 480 SP, 384-bit, 250W TDP
GeForce GTX 470 : 448 SP, 320-bit, 225W TDP


You are looking at 440W for the GPUs, more if you are buying OC'd versions. Lets say 450W for the sake of easy math. Toss in another 100W for a stock CPU and 50W for everything else, and you need a PSU that can output AT LEAST 600W on the 12V rail. If you will be using any OC'd parts, you'll need more. This is why you need a 750W or better for SLI GTX570s.

Drinking is fun, but don't forget to double check your math when you sober up.

Edited for spelling.


drinking is fun. so is reading, maybe you should re read my post :lol:  im getting sli gtx 560s. i dont know where you got 570s in your head. sli gtx 560s= max 300W.
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