"Future Proofing" for my rig

[Gary7]

Yo, 

 

I have checked out the threads on what is needed for what rig BUT I still have a question.

 

Is it worth going for a 750w PSU (EVGA Supernova G2) in anticipation of possible SLI in the far future? 

 

I had originally intended on purchasing the 650w but want to give myself as much room for movement and to be honest I'm sick of having to buy power supplies! The only thing that concerns me is electricity cost. 

 

Is there going to be a noticeable monthly cost in electricity if I get a somewhat overkill GPU for my rig (4670k, msi 970)

 

Currently I'm running a 500B but naturally this will just not be enough or of high enough quality in the long term.

 

[stealth80]

The PSU doesnt dictate how much power you PC actually draws from the wall (well a little) it will draw what it needs. A more efficient PSU is that, efficient. I have a 1000w PSU incase I go X99 / 3x SLI but it prob only draws around 600w fully loaded.

 

Think of it like needing to drink 1/2 litre of water but filling a 1 litre bottle fully. Theres a litre available, but you only need that 1/2 litre

[Slyhawk]

the power will only draw the power if it needs to doesn't always run at the 500, 650, 750, 1000 etc.

Edited January 27, 2016 by Slyhawk

[zMeul]

The PSU doesnt dictate how much power you PC actually draws from the wall

actually it does

it's called efficiency and has to do with how the PSU was built, for what loads

 

if you put a 1000W PSU in a system that draws ~300W on it's own, the efficiency will be horrible

 

 

here's an example: 

source: http://anandtech.com/show/9928/the-rosewill-quark-series-psu-review/3

for that PSU ^, the most efficient load is at ~550W

[colinreay]

Personally I would go for an 850w G2, not much, if at all more than the 750w G2. 850w I would say would give you more future "flexibility" for running SLI, 750w is pretty tight on something like X99 and 2 way SLI.

[stealth80]

actually it does

it's called efficiency and has to do with how the PSU was built, for what loads

 

if you put a 1000W PC in a system that draws ~300W on it's own, the efficiency will be horrible

 

 

here's an example: 

 

source: http://anandtech.com/show/9928/the-rosewill-quark-series-psu-review/3

 

Read my whole post, I did say efficiency has a little impact. I didn't wanna got bogged down explaining bronze, gold plat effects etc

[zMeul]

Read my whole post, I did say efficiency has a little impact. I didn't wanna got bogged down explaining bronze, gold plat effects etc

it has nothing to do with bronze, gold, platinum

the example I shown you is a PSU with 80+ Platinum

[Gary7]

Personally I would go for an 850w G2, not much, if at all more than the 750w G2. 850w I would say would give you more future "flexibility" for running SLI, 750w is pretty tight on something like X99 and 2 way SLI.

Im definitely not going to X99 - if anything skylake will be the next cpu upgrade.

[stealth80]

it has nothing to do with bronze, gold, platinum

the example I shown you is a PSU with 80+ Platinum

 

Actually It does. The higher the efficiency of the psu the less power is drawn from the wall for a given amount of power required. A 50% efficient PSU will draw 1200w to provide 600w to a pc, wasting 600w as heat. a 90% efficient PSU will draw 666w. wasting 66w as heat. The total amount of power the PSU has available has no affect on this what so ever

[zMeul]

Actually It does. The higher the efficiency of the psu the less power is drawn from the wall for a given amount of power required. A 50% efficient PSU will draw 1200w to provide 600w to a pc, wasting 600w as heat. a 90% efficient PSU will draw 666w. wasting 66w as heat. The total amount of power the PSU has available has no affect on this what so ever

that's in theory because you can't build 2+ PSUs on the same exact platform and have different certifications

[stealth80]

that's in theory because you can't build 2+ PSUs on the same exact platform and have different certifications

 

:huh:

 

Its the basis upon which efficiency is built. Why couldn't you run the same PC with a 80+ bronze psu in fully loaded and measure the draw from the wall and run the same test again with a 80 +plat and re-measure?  ​

[Gary7]

Guys, lets keep this on topic please. Thread has been hijacked with semi-irrelevant conversation

[Gary7]

So... 750 or 850?

I don't want to have to buy another for at least 2 years