Question i have a r5 2600 overlocked to 3.9ghz on 1.325 volts and i will be adding two gtx 1080 tis. I currently have the evga 750w for a psu, is it enough?

[Kachow420]

i have a r5 2600 overlocked to 3.9ghz on 1.325 volts and i will be adding two gtx 1080 tis. I currently have the evga 750w for a psu, is it enough?

 

[MrN1ce9uy]

Barely.. Which EVGA 750W do you have? What is your complete system specs?

 

[King_V]

Further - WHY are you adding two gtx 1080 ti's?

 

[Kachow420]

ryzen r5 2600 see previous clock, 2 x 8gb 3200 , 7.2rpm hdd 1tb, 2 fans mouse keyboard. two 1080tis because i got em for free from mining friend. PSU is the budget 750w literally just 750w it passes white cert but has no cert. Will 1080p gamin take all the power from both the gpus?

 

[King_V]

Just because you have two 1080Ti cards, does not mean it's a good idea to use both of them - at least if you plan on gaming, since SLI and Crossfire are dying techologies, with vanishing support.

If you're mining, that's a different story. In that case, your CPU overclocked, assume 100W (though probably less), and the 1080Tis are rated at 250W each when maxed out. That's 600W right there, plus a little more for MB, fans, RAM, etc.

If it's an EVGA White, that's one of the lowest quality models EVGA offers, if I recall correctly. I would suggest a Seasonic PRIME or FOCUS model, or a Corsair HX, AX, or RMx model. Minimum 850W for this whole setup.


HOWEVER - if this is going to be a gaming rig, put in only ONE video card. Then you can step down to about a 550W or 650W PSU.

1080p gaming? What is your monitor's refresh rate, and does it have GSync, FreeSync, or neither?

If you're gaming at 1080p, even a single 1080Ti card is overkill. Even if you could get SLI to work correctly (and that's a big if) with two 1080Tis, it's a complete waste. Don't bother with it.

 

[Kachow420]

Just because you have two 1080Ti cards, does not mean it's a good idea to use both of them - at least if you plan on gaming, since SLI and Crossfire are dying techologies, with vanishing support.

If you're mining, that's a different story. In that case, your CPU overclocked, assume 100W (though probably less), and the 1080Tis are rated at 250W each when maxed out. That's 600W right there, plus a little more for MB, fans, RAM, etc.

If it's an EVGA White, that's one of the lowest quality models they offer.

I would suggest a Seasonic PRIME or FOCUS model, or a Corsair HX, AX, or RMx model. Minimum 850W for this whole setup.

HOWEVER - if this is going to be a gaming rig, put in only ONE video card. Then you can step down to about a 550W or 650W PSU.

So this is a gaming rig, that being said I do want to use both as the games i play support two sli, not well but there is still a gain of live 40fps with two 1080tis vs a 2080ti. IF i keep the cpu at stock voltage would it be lower, and do you know of any cheap 850s? like half decent sub 90 dollars?

 

[Kachow420]

Just because you have two 1080Ti cards, does not mean it's a good idea to use both of them - at least if you plan on gaming, since SLI and Crossfire are dying techologies, with vanishing support.

If you're mining, that's a different story. In that case, your CPU overclocked, assume 100W (though probably less), and the 1080Tis are rated at 250W each when maxed out. That's 600W right there, plus a little more for MB, fans, RAM, etc.

If it's an EVGA White, that's one of the lowest quality models EVGA offers, if I recall correctly. I would suggest a Seasonic PRIME or FOCUS model, or a Corsair HX, AX, or RMx model. Minimum 850W for this whole setup.


HOWEVER - if this is going to be a gaming rig, put in only ONE video card. Then you can step down to about a 550W or 650W PSU.

1080p gaming? What is your monitor's refresh rate, and does it have GSync, FreeSync, or neither?

If you're gaming at 1080p, even a single 1080Ti card is overkill. Even if you could get SLI to work correctly (and that's a big if) with two 1080Tis, it's a complete waste. Don't bother with it.

240hz, Gsync idk man i think i can get sli to work alright but would two 1080tis be any faster than one like more than 40 frame difference with one more?

 

[King_V]

40 fps? I don't even know if you'll get THAT much of a benefit, maybe only in the most ideal, perfect circumstances.

The human eye can't really register 240fps. I doubt really much more than 100, to be perfectly honest. But, since your monitor has GSync, it doesn't matter - the automatic refresh-to-framerate adjustment will keep things buttery smooth.

Here's my recommendation:

1. Try things out with a single 1080Ti, and do NOT overclock or overvolt the CPU. Play the games you like to play, with GSync enabled. Honestly, I'd even say that if the game or drivers let you put a limit on it, cap the frames at 120 max, or maybe even 100 or so (I am not familiar with GSync settings). See how everything feels. You can do this with the EVGA White for the time being, I think, but honestly, I would like to see that unit replaced - the only reason I'd trust it with the single GPU for now is because of how much extra capacity it has over what your system needs.
2. Replace that EVGA white. Get a PSU of one of the models I'd mentioned in my previous post. They are very high quality units. If you really want to try this dual GPU thing, go with 850W or so, but if you decide to stick with one GPU, go with 550W, or 650W if you like extra headroom, should be plenty.

At 550W or 650W, they can generally be found under $100. At 850W or more they will definitely be over $100. However, the price for the stable, solid power and reliability are MORE than worth it. You do NOT want to fry any components because of a questionable PSU.