Will my PSU be enough for current system + gtx 780?

[Hospitaller]

I have this 550W XFX PSU:
http://www.newegg.com/Product/Produc...82E16817207013

I'm thinking of upgrading from GTX 560 Ti to GTX 780:
http://www.amazon.com/Gigabyte-GTX78...ywords=780+gtx


This is the rest of my system:

ASUS P8P67 LE P67 1155
i5 2500K @ 4.0ghz
16GB 1600mhz ram
2x hard drives, and 2x samsung 830 SSDs
(I run 2560x1440 res)

The 780 page says a 600W PSU is recommended. I have a "kill-a-watt" meter between the wall and my power strip to monitor the wattage of my entire system, and while gaming I've never seen it report over 250W.

Am I "probably" fine with the 550W PSU and this card? I'd rather not swap power supplies if I don't need to.

 

[blackened23]

Are you "probably" fine? Yeah. Definitely fine? No. A lot depends on overclocking as overclocking exponentially increases power consumption depending on what you're doing.

I'd say there's a 95% chance that your current PSU is fine. I mean the 560ti doesn't have a radically different TDP than the 780 - 170W vs 250W. From power consumption charts I've seen, most 780s do not draw past 420W total system power while gaming. Most power draw charts i've seen are even less than that - you may want to google this to check total system power draw of 780s and add 50-100W to that to account for your overclocked CPU. But this can vary depending on over-voltage and overclocks. So it's hard to give a definite yes or no. A 95% probably yes? Sure.

 

[rtsurfer]

I have this 550W XFX PSU:
http://www.newegg.com/Product/Produc...82E16817207013

I'm thinking of upgrading from GTX 560 Ti to GTX 780:
http://www.amazon.com/Gigabyte-GTX78...ywords=780+gtx


This is the rest of my system:

ASUS P8P67 LE P67 1155
i5 2500K @ 4.0ghz
16GB 1600mhz ram
2x hard drives, and 2x samsung 830 SSDs
(I run 2560x1440 res)

The 780 page says a 600W PSU is recommended. I have a "kill-a-watt" meter between the wall and my power strip to monitor the wattage of my entire system, and while gaming I've never seen it report over 250W.

Am I "probably" fine with the 550W PSU and this card? I'd rather not swap power supplies if I don't need to.

Card should be almost fine at stock.

You would almost be running the PSU at max when you are gaming.
Which might cause a problem. Careful on the might here, it mean 5% out of 100.

Well if your PSU trips once a during gaming then that should tell you that you need a bigger PSU. All is well till that day.

Don't try much overclocking though. That will most certainly cause issues.

 

[nwo]

You will be fine.

600W PSU recommendation has to factor in for the garbage and/or split rail PSUs. Yours is a single rail quality unit and you will have no issues with your current PSU. Your usage is only gonna go up by 100W or less anyway compared to a GTX 560Ti which leaves you with 150W+ to spare for OCing.

 

[MongGrel]

Should be ok at 550, that PSU I've never used and a bit leary of.

Just me maybe. The power rating should be fine.

 

[Skurge]

You will be fine. That system should draw no more than 450w

 

[FalseChristian]

I have to digress. I have a good quality 750w PS and it is the minimum you want for a lowly GTX 760 2GB let alone a GTX 780. If your PS works with 1 GTX 780 it won't work with 2. Good luck.

 

[thedosbox]

I have to digress. I have a good quality 750w PS and it is the minimum you want for a lowly GTX 760 2GB let alone a GTX 780.

Nonsense. I've been running a i5-4670K & MSI GTX 780 on a Seasonic 650W for months without issue.

Various sites have also measured power consumption of a heavily overclocked i7-3970X & GTX 70 based system. They don't even pull 550W at the wall.

 

[BonzaiDuck]

I have to digress. I have a good quality 750w PS and it is the minimum you want for a lowly GTX 760 2GB let alone a GTX 780. If your PS works with 1 GTX 780 it won't work with 2. Good luck.

Sounds about right. I just installed an ASUS GTX 780 "Direct CU II" and contemplated getting two for SLI. But a $1,000 outlay didn't seem realistic to me in terms of a long-term benefit. I might do it still, though, but that adds four fans to the case when I'd reduced to total five and including the small fan on the previous gfx card -- a GTX 570. Nevertheless, the fans on the ASUS 780 card are very, very quiet.

So the recommendation for two 780 cards: Use an 850W or better PSU. With a single 780 card, I don't think the total power consumption would ever exceed 450 to 500W -- never -- nooo, Sir. My 750W might be enough for two, but that's cutting it close.

Of course, your power requirements increase if you overclock, and I overclock. So maybe the latest wisdom is correct -- you could get by with a 650W PSU under stock situations.

 

[Kenmitch]

I have to digress. I have a good quality 750w PS and it is the minimum you want for a lowly GTX 760 2GB let alone a GTX 780. If your PS works with 1 GTX 780 it won't work with 2. Good luck.

My Rosewill Capstone 450-M powering my XFX DD 290 begs to differ with your opinion on power requirements.

My take is if it'll mine 24/7 without issue then it's good to go under everyday use.

I know I'm kind of living on the edge as far as power requirements go but thought I'd try it and see....Time will tell I guess.

I doubt the OP will have any issue running a single cards with his current power supply. I guess there is the possibility he got one of marginal build quality tho.

 

[bigsnyder]

Sounds about right. I just installed an ASUS GTX 780 "Direct CU II" and contemplated getting two for SLI. But a $1,000 outlay didn't seem realistic to me in terms of a long-term benefit. I might do it still, though, but that adds four fans to the case when I'd reduced to total five and including the small fan on the previous gfx card -- a GTX 570. Nevertheless, the fans on the ASUS 780 card are very, very quiet.

So the recommendation for two 780 cards: Use an 850W or better PSU. With a single 780 card, I don't think the total power consumption would ever exceed 450 to 500W -- never -- nooo, Sir. My 750W might be enough for two, but that's cutting it close.

Of course, your power requirements increase if you overclock, and I overclock. So maybe the latest wisdom is correct -- you could get by with a 650W PSU under stock situations.

750w (if it is a good quality unit) will easily power two non-Ti 780s unless your getting into some hardcore overclocking with water-cooling.

 

[OCGuy]

You will be fine.