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help

post #1 of 8
Thread Starter 
How much power do i need to run this rig?

i7 4770k
gtx 780 sc acx
h100i
total of 5 120mm fans
1 2tb seagate barracuda hd
asus pce-ac68 (wireless pci-e card)


- no intention of adding SLI, only upgrading to a newer, single card.
- no overclock / minimal overclock


450w, 550w or 650w?

it is probably not worth it opening a new thread for this but i didn't know where to ask.

Thank you.
Edited by drs101 - 10/8/13 at 5:05pm
post #2 of 8
Welcome to OCN!

You could get away with a quality 550w but a 650w will give you overclocking headroom for both the GPU and the CPU. Either way make sure to look at the PSU thread for examples of quality PSUs. I'm sure shilka will be in here soon enough to recommend one for you. Also remember the GTX 7XX series will auto overclock so you want a bit of wattage room even if you don't plan to OC yourself.
post #3 of 8
Thread Starter 
Quote:
Originally Posted by speedytech7 View Post

Welcome to OCN!

You could get away with a quality 550w but a 650w will give you overclocking headroom for both the GPU and the CPU. Either way make sure to look at the PSU thread for examples of quality PSUs. I'm sure shilka will be in here soon enough to recommend one for you. Also remember the GTX 7XX series will auto overclock so you want a bit of wattage room even if you don't plan to OC yourself.


Thank you for your reply. i was looking at the new corsair RM series, i've noticed they are all 80 plus gold and modular, which is important for me as i have a mini atx and my current psu is not modular, which is a pain in the ass for cable management. i also should mention that went for an extremely overkill psu xD. that is why i am looking for a change. any advise? is the rm650 the way to go then?
post #4 of 8
With no-to-moderate (i.e. not much overvolting) overclocking, 450W is enough to sustain unrealistically heavy loads on that setup.

When under normal Boost clocks, power draw shouldn't really go higher than what the power limits are, so you don't need to add wattage to count for that. It's upping clock speeds as it can while staying under certain power and thermal thresholds.

It's more of an issue of quality than whatever number is put on the label though. Cosair RM should be fine, but there are many alternatives too.
Edited by mikeaj - 10/8/13 at 5:27pm
post #5 of 8
Thread Starter 
i just found this video where a gentleman demonstrateshow a similar / more consuming system only pulls about 350 watts off the wall


http://www.youtube.com/watch?v=LiWThqgFfI4


hmm...
post #6 of 8
GTX 780 is based on GK110, a much larger chip than the GTX 680's GK104, and the graphics card there is only running at 1.1V. Hence why I said around 450W.

550W-650W is in the realm of excessive if you're doing at most a minimal overclock—which I assume wouldn't involve any significant voltage increases.
post #7 of 8
Thread Starter 
Quote:
Originally Posted by mikeaj View Post

GTX 780 is based on GK110, a much larger chip than the GTX 680's GK104, and the graphics card there is only running at 1.1V. Hence why I said around 450W.

550W-650W is in the realm of excessive if you're doing at most a minimal overclock—which I assume wouldn't involve any significant voltage increases.

you are probably right but i am quite shocked that it takes such a small psu, i find it hard to believe :/
post #8 of 8
Quote:
Originally Posted by drs101 View Post

you are probably right but i am quite shocked that it takes such a small psu, i find it hard to believe :/

So did i to begin with but the truth is still the truth

Something like the Cooler Master V450S/V550S if you can find that one is a good bang for buck option

Or the Seasonic G 450/550 watts which is the second best thing
Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
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