New rig

[Bullu]

Hi all,

I'm planning on getting a new gaming rig. Can you give me some feedback on the below components? Thanks

 

-Phanteks Enthoo Evolv X RGB

-3x 140mm Premium Phanteks Fans

-Full size Dual Tempered Glass window panel 

-Phantekx Revolt Pro 80+ Gold 850W Fully Modular

-Intel Core i7 Coffee Lake 8700k 3.7Ghz (4.7Ghz Turbo max) Overclocked

-NZXT kraken X62 RGB liquid cooler

-G.Skill Trident Z 16GB 3000Mhz 

-Asrock Fatality Z370 Extreme 4 RGB

-Gigabyte Gaming OC/ MSI Gaming 8G RTX2070 8GB

-512GB SSD Drive / M.2 (for os)

-1Tb SSD (for data)

[Spotty]

Looks pretty good.
Only thing I would suggest is you don't need an 850W PSU - Even an overclocked 8700K at 5GHz + RTX2070 will use less than 400W. A good quality 550W would be more than enough and plenty of room if you ever wanted to replace the GPU with a 2080Ti or such down the line.

[Cyracus]

12 minutes ago, Spotty said:

Even an overclocked 8700K at 5GHz + RTX2070 will use less than 400W. A good quality 550W would be more than enough

peak efficiency tends to be at about 50% load so about 700-750W by your rough number would be ideal

[Spotty]

19 minutes ago, Cyracus said:

peak efficiency tends to be at about 50% load so about 700-750W by your rough number would be ideal

If you want a more efficient PSU, buy a more efficient PSU. Don't buy a higher wattage one.
Which do you think would be more efficient? A 450W 80+ Gold unit or a 750W 80+ Bronze unit? A 80+ bronze PSU at 50% only needs to be 85% efficient. A 80+ Gold PSU at 100% load needs to be at least 87% efficient. (115V)

Peak efficiency of a PSU varies depending on the unit. Could be 40%. Could be 60%. Could be 80%. All depends on the unit.
Look at the RM550x efficiency curve for example. There's bugger all difference in efficiency between 30%, 50%, 70%, especially if you're on 230V AC where it's pretty much a flat line after 30% between 91.5 - 92% efficiency.


Most PSUs are least efficient below 20% load (see above graph), which is where a 750W PSU would be most of the time with that system when it's idling on desktop and browsing the web, so you will likely end up with worse efficiency using a higher wattage unit.

Please stop spreading this crap that you need to double the wattage your system requires in order to get the 'most efficiency' from your PSU. People who believe this junk just end up wasting money on PSUs they don't need, or worse they end up cheaping out buying a crap quality high wattage unit instead of buying a good quality unit with suitable wattage.

[Cyracus]

13 minutes ago, Spotty said:

If you want a more efficient PSU, buy a more efficient PSU. Don't buy a higher wattage one.
Which do you think would be more efficient? A 450W 80+ Gold unit or a 750W 80+ Bronze unit? A 80+ bronze PSU at 50% only needs to be 85% efficient. A 80+ Gold PSU at 100% load needs to be at least 87% efficient. (115V)

Please stop spreading this crap that you need to double the wattage your system requires in order to get the 'most efficiency' from your PSU. People who believe this junk just end up wasting money on PSUs they don't need, or worse they end up cheaping out buying a crap quality high wattage unit instead of buying a good quality unit with suitable wattage.

750w bronze? whoever suggested that? I wasn't suggesting they downgrade the quality of the unit they were buying, just the capacity, and to a lesser extent than you. And I never said anyone needed to double the peak power draw, probably closer to 550W btw (see linked info) So yeah 750 W would probably be good 

 

[Spotty]

Just now, Cyracus said:

And I never said anyone needed to double the peak power draw

Yeah, you did... I said that the system would use less than 400W peak, and you said that based on my power estimations 750W would be ideal wattage because you need it to be at 50% load for highest efficiency... You told them to buy a PSU with double the amount of wattage the system draws in order to get the best efficiency.

1 hour ago, Cyracus said:

peak efficiency tends to be at about 50% load so about 700-750W by your rough number would be ideal

 

 

33 minutes ago, Cyracus said:

750w bronze? whoever suggested that? I wasn't suggesting they downgrade the quality of the unit they were buying, just the capacity

That's exactly the point. You never said anything about the quality of the unit or the efficiency of the unit. You just said that a 750W unit would be more efficient [based just on its wattage]. The point is that higher wattage does not equal higher efficiency. They're different things. If you want better efficiency, look for PSUs which have better efficiency ratings, not more wattage. It would have made more sense if you said "If efficiency is important to you, maybe look for a 80+ Platinum unit".
 

3 minutes ago, Cyracus said:

probably closer to 550W btw (see linked info)

A) If you think the max power draw will be 550W, why are you still recommending a 750W PSU?
B) An 8700K + RTX 2070 does not use 550W.

Even if you're running Prime95 and Furmark at the same time you'll still struggle to hit 400W total system draw.

Spoiler

My 6700k at 4.8GHz 1.4V with an overclocked GTX1080Ti barely pulls 500W measured at the wall under heavy load. That's before efficiency loss, so really like 450W system draw.

That reddit you linked to as your source for an 8700K + RTX 2070 needing 550W? It's someone commenting saying that their 8700K overclocked to 5GHz with a GTX 1080Ti running AVX work load and stress testing the GPU at the same time peaks at 540W power draw measured at the wall (so probably around 475W system draw). That's with a GTX 1080Ti which is much more power hungry than a RTX 2070! Even then it's still not reaching 550W system draw!

 

41 minutes ago, Cyracus said:

So yeah 750 W would probably be good

... Yet you're still telling people to buy a 750W PSU for a system that will use less than 400W...

[Cyracus]

OP it's up to you what you get, I'm seeing peak power draw for an overclocked 8700k as high as 300W and peak power draw for a rtx 2070 up to 260W. The last thing you want is to blow your power supply by overloading it because doing so can fry all your components. 

[Bullu]

On 2/23/2019 at 9:50 AM, Spotty said:

Looks pretty good.
Only thing I would suggest is you don't need an 850W PSU - Even an overclocked 8700K at 5GHz + RTX2070 will use less than 400W. A good quality 550W would be more than enough and plenty of room if you ever wanted to replace the GPU with a 2080Ti or such down the line.

Thanks for your input