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post #1 of 8 (permalink) Old 02-12-2020, 08:38 AM - Thread Starter
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750w enough?

Considering a few options for a new build and trying to keep costs down (without cutting corners) and I am trying to figure out of my 750w Corsair HXi will be sufficient for some or all of these builds

I will start with the hardware that will be the same across all options
2080 Super
GT 710
Addin USB3 card
4x 16GB DDR4
6x WD Red 3.5" 5400 rpm drives
3x nvme drives
~10 Corsair LL120 fans
Full custom watercooling loop with 1 (possibly 2 pumps)


CPU choices are as follows,
3950X
10980xe
3960X


I am fairly sure i would be ok with the 3950X but i am worried if the 2 bigger cpus would be too much for the 750w. Dont plan on overclocking at all

Thoughts?


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post #2 of 8 (permalink) Old 02-12-2020, 08:46 AM
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Uh, what is the GT 710 for, you will only cripple 2080s performance even without enabling PhysX to compute on the GPU. If you didn't already buy LL120 then consider spending that little extra on ML120s from Corsair, they're uncomparably better and cost only a little more.


750W will be sufficient for all of your options but only on stock or LITTLE overclock.

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post #3 of 8 (permalink) Old 02-12-2020, 08:49 AM - Thread Starter
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Quote: Originally Posted by BroadPwns View Post
Uh, what is the GT 710 for, you will only cripple 2080s performance even without enabling PhysX to compute on the GPU. If you didn't already buy LL120 then consider spending that little extra on ML120s from Corsair, they're uncomparably better and cost only a little more.


750W will be sufficient for all of your options but only on stock or LITTLE overclock.


The GT710 is there because this is for unraid, and since i will be passing through the 2080 Super to the gaming VM and none of the cpus in question have a built in igpu, it would be for unraid

I already have 6x LL120's so i would probably just buy a couple more vs rebuying all the fans (I will look into them though, thanks)


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post #4 of 8 (permalink) Old 02-12-2020, 08:50 AM
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It is enough....but nah, 2080S and 10-16 core cpu with full loop and extra gpu and 10 HDD"s and 10 fans........ I would go min 850w. Plus it's old. New high end RIG,new PSU. Why mince $130 for a $1400 cpu and $300 mobo?

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post #5 of 8 (permalink) Old 02-12-2020, 08:51 AM
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Its more than enough power

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post #6 of 8 (permalink) Old 02-12-2020, 08:57 AM
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2080 Super
GT 710

3x nvme drives


CPU choices are as follows,
3950X
10980xe
3960X
[/QUOTE]

ok you cant go X570 or Z series in intel

you want to put 3 nvme drives = 12pcie lanes are gone to just feed these

amd have 24

so 16x to gpu , 4 for IO , 4 for Single nvme
if you put 2 more you will be forced to go 8x pcie for gpu which is fine but cant add 2nd gpu like you plan.
or a faster network card like 5gbps or 10gbe. (some boards now come with 5gbps)

now intel is somehow confusing for me as I know they are x16 +Dmi 3.0

am not sure but I think their Dmi Link is equivalent of 4X pcie gen 3.0 which is not enough to have 3 nvme drives + 1 gpu

8x pcie for RTX 2080 Super
4X for nvme
4X for 2nd nvme

Io+ NVME on the Dmi =.=! i think will be fine coz even on 2x pcie the nvme ssd's still perform fast but not full speed.


so you either drop some SSD's or you change platform and go X399 - X299


Regarding Watt I would say go for 850W
you have 2 pumps and i9 draw huge amount of power and the 3950x.


why ppl buy more watts than they need because of how psu works
noise = the hybrid fan noise mode make psu so quite till you get 30% load.
The optimal performing % is 50%.
and degrading psu performance over the years.

so getting a decent chunk extra is good. even better if you want to upgrade or change in future as psu usually stays and travel from one build to the next.



now about cpu's it depends on your usage if you are just gaming only then the 3950x is a waste and i suggest to buy a cheaper cpu , maybe instead invest in better monitor or RTX 2080 Ti etc..
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post #7 of 8 (permalink) Old 02-12-2020, 09:02 AM
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Rough estimate looks to be 'enough', but for this nice rig, go 1000+ watt imo. Dual card + OC future decision (you may change your mind later on). Like fido suggests, the larger the psu, the less strain on it.

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post #8 of 8 (permalink) Old 02-12-2020, 09:37 AM - Thread Starter
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To be clear, I already own the 750w power supply thats why. (Also i already have the 2080S)

@fido , Ryzen has 24 lanes but the chipset also provides 16 lanes
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