750 watts enough?

[Camdenb]

Hello all! I am running an i7 920 rig, with 6 sticks of ddr3 ram, radeon hd 4890 graphics card, 1 24x dvdrw, 1 5400rpm hdd, 5 80mm fans and 1 120mm fan. I am running all of this off of an antec earthwatts 750 psu. Do you think this is enough to power all of that?

 

[MKBL]

You can calculate PSU requirement from here:

http://www.thermaltake.outervision.com/

 

[Supernova1138]

You have more than enough power for that system. Your system probably only draws about 400 to 450 Watts at absolute maximum. You could throw in a second 4890 for Crossfire and you still would have power to spare. You have a good quality power supply, so you don't need to worry about that, you have plenty of headroom.

 

[ahnilated]

Yes, you should be fine with that. Are you doing any overclocking? even with overclocking you shouldn't run into any issues. I have an i7 920 running at 3.8G with a GTX 460 (overclocked also), 1DVD drive and 5 hdds with 6 X 120mm fans and no issues with a 750 watt PS.

 

[CaedenV]

you could run 2 570s in SLI on that system and be perfectly fine. You are likely running ~450W or less, with room for a 2nd GPU if you wanted to.

Keep in mind that OCing greatly changes the wattage of devices, so if you are doing a major OC on the CPU and GPU you could be running ~550-600W

 

[CaedenV]

A quality 550w PSU is more than enough for your system.

Good point, quality is key. There are some craptastic 750W power supplies out there that would not be able to handle the GPU load.. but an Antec should be just fine.

 

[Camdenb]

Thanks a lot guys I appreciate the prompt responses!