780 GHz times two on a 750w?

[SAFry]

I guess this board gets a bit repetitive after a while?

I got two 780 GHZ and an AMD hex core, and a bunch of hard drives, ran it through a calculator which didn't have the GHz OC version of my cards as an option, BUT it said 718w.

However, elsewhere I've read that a full loaded GHz edition card pulls 300w more than an idle on. So 300*2= 600 before anything else! I've tried the cards out a bit hot and nothing bad happened. It's a 750w Superflower Gold Leadtex, don't really want to push it too hard just in case.

I was considering getting an AMD Piledriver FX-8 Eight Core 9590 Black Edition 4.70GHz and upgrading the PSU to a SuperFlower Leadex Platinum 1200W Fully Modular "80 Plus Platinum" Power Supply just to be sure..

Or maybe I should get one of those £20 wattage meters that goes on the socket just to sanity check if I'm actually pulling anything near what the calculators say I am?

 

[SAFry]

CPU is a 6300 OCed to 4.2GHz, yeah my mate was winding me up saying that I'd probably get CPU bottleneck but so far I've seen no indication of that happening. Maybe I can just hold out on for the CPU/Motherboard upgrade until I can jump to DDR4.

So should I upgrade to the 1200w? It's only a £15 more than the 1000w and I figure I wouldn't have to buy another PSU for at least 5 years. I've not heard the fan on my 750w kick in yet but then I'm still running 1080 and I'm doing all this to go to 4k so it might start running hot then.

**edit** actually it's more like £25, I'm sure a 1000w will be fine. Even IF I upgraded the CPU which I think I wont now.

 

[SAFry]

Take a look at the EVGA Supernova G2 psu's. They are built by Superflower and are based on their own Leadex Gold platform but come with a whopping 10 year warranty. The 1000w G2 is £15 cheaper than the Superflower and they are basically the same psu.

Funny, I had an EVGA 750w and it broke after 11 months, RMAed it and they left it until the very last day and Overclockers sent me the Superflower in the end.

I got a free smart meter for the house and managed to do some testing. At idle the whole house draws 500w. When I put FurMark test on at 4k with no AA, I managed to get 70fps (woo!) and got both GPUs upto 100%

Total power consumption jumped up to 1200w! Wow, so that's 700w right there, well done Superflower PSU, what a trooper, well for 60 seconds anyway.

Just glad my 1000w Platinum is arriving tomorrow. Should do me even if I need to upgrade the CPU at some point.

 

[SAFry]

Oh sorry for overstating my PSU requirements, I was worried I might over tax my PSU and damage it or my system. Also 700w AT THE WALL was the increase when I started the benchmark, not the total consumption. And my CPU wasn't fully taxed at the time either.

I could always return the 1000w, I haven't opened it yet. Also didnt want my PSU having to work too hard and get all hot and noisy. And I was thinking of future CPU upgrades.

The Gigabyte website says the GHz want 600w each which is obviously overstating it a bit.

End of the day I've got better things to spend money on if you think the upgrade is really pointless?

**edit**

p.s. apologies if I sounded a bit arsey above, maybe you caught me at a low ebb of buyers remorse. I still haven't opened the 1000w PSU, will leave it 24 hours. Every calculator I did had me pretty much on the borderline for a 750w PSU, experimentation tended to back that up although I haven't actually tested it all the way to a brown-out. I just think I would worry less knowing that I had enough power for my GPUs and an overclocked CPU upgrade or whatever the future holds. As long as it's not another overclocked 780 GHz! I mean 850w would probably be fine but I'd hate to have to buy yet another PSU. AND I can always recoup my costs on the 750w by sneaking it into another build

Receiving my 28" 4k Asus monitor today and seeing it in action has definitely cheered me up, nothing I've tried in 4k has actually pushed the GPUs anywhere near what the benchmark did.

 

[SAFry]

I've just written to OC to ask if I can return it unopened. I've still never even heard my 750w PSU fan kick in. Tried to make it brown out using Prime and FurMark but it all runs fine. I'm sure if I do actually have a greater power requirement in future OCs will be glad to ship me one.

By the way, in case you were wondering, 4k gaming is a bit so-so, actually not as good as 2560x1440 with the AA turned up for most games! But that's a discussion for another board...

Cheers guys.