550w for GTX 570?

[D.Phantom]

I've posted my doubt about my PSU I know my psu can handle my setup, but I'm comparing prices and I thought it better to pay a little more for a GTX 570 instead of buying the GTX 560, but I do not know if my PSU can handle ,is a 550w xfx edition core P1-550S-XXB9, it can handle a single GTX 570?I will not overclock.

1x hd 500gb ,1x hd 160Gb 1x optical drive

1x EVGA GTX 570 1Gb

asus p8p67-LE

G.Skill Sniper DDR3 1333MHz 8GB(2x4gb)

Intel Core i5 2500

550w is enough?should i upgrade to 650w? ,my budget is not too high and a 650w psu is more expensive.Thanks.

 

[dmoney1980]

here you go sir

http://educations.newegg.com/tool/psucalc/index.html

 

[BoomerD]

nVidia says 550 watts for total system power is the minimum recommended power supply.

Anandtech's testing says under Furmark, (highly unlikely any game will draw this much) you need at LEAST 470 watts.

Personally, I don't like having a power supply that barely meets the recommended specs...I'd go with a quality 650 watt unit if it was me.

If you're buying in the USA, you can get the following PSU's at decent prices:

Corsair $79 after rebate plus $20 promo card and free shipping:
http://www.newegg.com/Product/Produc...82E16817139020

XFX $59 after rebate ($5.99 shipping)
http://www.newegg.com/Product/Produc...82E16817207014

Antec $74 (no rebates, $4.99 shipping)
http://www.newegg.com/Product/Produc...82E16817371048

There are many cheaper power supplies...but they're not very good quality.

 

[RavenSEAL]

Always go with more if you can...there is no such thing as an overkill when it comes to power supplies (up to 850w+, lol).

 

[lehtv]

Of course there's overkill when it comes to power supplies. Why waste cash on extra capacity that you simply don't need. For a single 570, 750 watts would be pretty overkill unless it's just a crap unit. 650W would be sufficiently big for overclocking without being overkill. Could probably say the same about a 550W unit that has +12V output rated at over 500W.

 

[D.Phantom]

It's on the XFX official website that my PSU have 44 amps on the 12v rail ,and nvidia recomends a power supply with 38 amps on the 12v rail ,so i think that my PSU should work.

Here is:
http://xfxforce.com/en-us/Products/...-PSU/550W-Core-Edition-Full-Wired-Bronze.aspx

 

[Golgatha]

Your PSU should run it, but I'd want some overage for the long term. 44A = 528w.

GTX 570 at load is around 330w. Add in 150w for your CPU and system at load, which gets you at approximately 480w for the system at load. Personally I'd want 55A or better on the 12V rail to put you at around 60% of the PSU's max capacity.

Edit: Your i5 is much lower for system power at load than I thought. You should be fine, but I'd still want a quality 650w PSU for that system if it were me.

 

[lehtv]

GTX 570 at load is around 330w. Add in 150w for your CPU and system at load, which gets you at approximately 480w for the system at load.

BS. GTX 570 consumes about 210 watts. The CPU consumes under 100W. In a typical load scenario, the +12v rail will be stressed under 300W which is less than 60% of its rated capacity. The XFX 550W is easily enough.

 

[Rvenger]

XFX 550w is a quality Seasonic unit that would probably peak 650w with ease. Your PSU is fine.

 

[pugh]

Always go with more if you can...there is no such thing as an overkill when it comes to power supplies (up to 850w+, lol).

Where are you guys getting this information from? What fact is in this? I see this erroneous statement more and more on many of the techs boards I frequent...

 

[BoomerD]

Where are you guys getting this information from? What fact is in this? I see this erroneous statement more and more on many of the techs boards I frequent...

The only real problems with buying an oversized power supply are:
1) initial purchase price...the larger they are, the more they cost.
2) efficiency. If the power supply is capable of MUCH, MUCH more wattage than the system demands, it may not be running in its peak efficiency curve.

Otherwise, it's not like an 850 watt power supply is constantly putting out 850 watts, even if the load being drawn is only 300 watts...it only puts out as much wattage as is needed.
Does it make sense to buy a power supply that is capable of 3 or 4 times the load needed? Nope...but IMO, only from the perspective of purchase price...why spend that much on a power supply when you can buy one with a smaller output and use the money elsewhere...say a nicer video card or an SSD?

 

[BFG10K]

A quality 550W PSU won’t have any trouble. I run my rig below on a 560W and a lot of the time the fan doesn’t even turn on during gaming sessions.

 

[pugh]

I agree with you Boom.

 

[D.Phantom]

Thanks:biggrin: