Awesome. Thank you!
So, here are the culprits for these extremely high calculations:
- High-End Desktop. You have a Regular one.
- Do you really have a PCI IDE card?
- Do you really have a 2nd PCI card? Or, do you have just one PCI card in total?
- 4 USB devices. Most people add 2 for their mouse and keyboard. If you did that, then remove them because this calculator has the calculation for a mouse and a keyboard built into it.
- Do you really have two high-performance fans? Which fans are they?
- Do you really have a pump relay in addition to the Corsair H80?
- System Load: this should be at about 75% unless you are Folding on both the CPU and the video card at the same time.
- Capacitor Aging: this is the main problem. 35% is EXTREMELY unrealistic for a good PSU. 10% is the highest that should be selected because really, capacitor aging is not an issue with good PSUs if all of the caps are high-quality Japanese ones.
Here are your new calculations with only the following changes:
- High-End Desktop to Regular
- System Load from 90% to 75%
- Capacitor Aging to 10%. It should be none though (just being honest).
I used the Pro Version of this calculator in order to show what it recommends for the +12V capacity. It's extremely revealing:
30.6A on 12V of power is 367.2W. This means that you could power this with a good quality-made 400W PSU if you really wanted to. So, why do they recommend 411 and 461W? I really don't know. lol Again, 30.6A is only 367.2W. Even if it were 31A, that would still only be 372W which is 12W less than the +12V capacity of some pretty good 400W PSUs (32A, 384W).
A good quality-made 450W PSU is easier to find these days though.
42.3A on 12V of power is 507.6W. That is only 3.6W higher than 504W, which is the typical +12V capacity of some semi-decent 550W PSUs. Good 550W PSUs usually have a +12V capacity of 540W, which is 45A. So yeah, you could power this one with a good quality-made 550W PSU pretty easily.
Still not convinced?
With one 7950W under full load in their system, their PSU pulled 300W from the wall outlet. Their CPU was idling, so if I add even 200W for your CPU under full load (a bit too much, but hey!), then that makes the PSU pulling 500W from the wall outlet. This means that if the PSU is 90% efficient while pulling 500W from the wall, then the computer is pulling 450W from the PSU. Your gaming power consumption for this would never exceed 400-425W. However, again, I added 200W for the CPU which is pretty crazy. If I add something more reasonable like 150W, then the power "extreme" consumption (before looking at the gaming power consumption) would be 405W (450W x .90). This would mean that the gaming power consumption would peak at roughly 375W. That would be very easy for a good quality-made 450W PSU.
Now, onto the R9 290X:
With one R9 290X under full load in their system, their PSU pulled 396W from the wall outlet. Let's just use 400W. So, if I add 200W for the CPU again, then that makes the PSU pulling 600W from the wall outlet. This means that if the PSU were 90% efficient while pulling 600W from the wall, then the computer is pulling 540W from the PSU and the gaming power consumption would peak at about 500-525W. However, that's kind if ridiculously high. If I add 150W for the CPU instead, then the "extreme" power consumption becomes 495W (550 x .90), and the maximum gaming power consumption becomes about 450W. That would be very easy for a good quality-made 550W PSU.
Edited by TwoCables - 4/11/14 at 4:18am