Mistake Picking my PSU

[B0o0]

     When I was picking out parts for my gaming rig two years ago, I only went off the estimated wattage on the pcpartpicker site. The estimate was 438W total, so I thought a gold 550W was enough. I only found out recently when I started to play more demanding titles, watching overclocking cut my performance, and Afterburner saying it couldn't get the voltage it needs in a scan. I made another estimate here https://outervision.com/b/mYOtGq, and looked through the posts here to confirm I should have gotten at least 650 in wattage.

 

     So now I need to look into a proper PSU, and could use help picking one out. I'm budgeting $150, and preferably don't want to wait long as I've been seeing weeks of delay on Amazon and Newegg.  Funnily the wattage site recommended this Gamemax PSU https://www.amazon.com/dp/B083RR7GBT/?SubscriptionId=AKIAIGIKPS7N7DIKIGVQ&tag=xov-20&linkCode=xm2, when the tier list put it in D tier. 

PCPartPicker Part List

Type	Item	Price
CPU	Intel Core i7-8700K 3.7 GHz 6-Core Processor	$349.99 @ Newegg
CPU Cooler	Deepcool CAPTAIN 240EX WHITE 153.04 CFM Liquid CPU Cooler
Motherboard	Gigabyte Z370N WIFI Mini ITX LGA1151 Motherboard
Memory	G.Skill Ripjaws V Series 16 GB (1 x 16 GB) DDR4-3200 Memory	$64.99 @ Newegg
Memory	G.Skill Ripjaws V Series 16 GB (1 x 16 GB) DDR4-3200 Memory	$64.99 @ Newegg
Storage	Samsung 970 Evo 500 GB M.2-2280 NVME Solid State Drive	$99.99 @ B&H
Storage	Samsung 970 Evo Plus 1 TB M.2-2280 NVME Solid State Drive	$229.99 @ Adorama
Video Card	Gigabyte GeForce GTX 1080 Ti 11 GB Gaming OC 11G Video Card	$1259.00 @ Amazon
Case	NZXT H200 Mini ITX Tower Case
Power Supply	EVGA SuperNOVA G3 550 W 80+ Gold Certified Fully Modular ATX Power Supply	$115.97 @ Newegg
Monitor	Acer XB271HU bmiprz 27.0" 2560x1440 165 Hz Monitor	Purchased For $600.00
Mouse	Logitech G703 (White) Wireless Optical Mouse
	Prices include shipping, taxes, rebates, and discounts
	Total	$2784.92
	Update: Since 550W works for this setup, I don't need a PSU, but a better understanding on overclocking, and crash results.

 

Edited May 21, 2020 by B0o0
Update

[boggy77]

i think 550w should be enough, there must be some other issue.

[seon123]

6 minutes ago, B0o0 said:

I only found out recently when I started to play more demanding titles, watching overclocking cut my performance

That has nothing to do with the PSU wattage

6 minutes ago, B0o0 said:

I made another estimate here https://outervision.com/b/mYOtGq, and looked through the posts here to confirm I should have gotten at least 650 in wattage.

You would get a more accurate estimate by going to random.org and generating a random number.

[schwellmo92]

That PSU is fine for your system.

[Dedayog]

I have a similar system and don't pull more than 420w from the wall, even OC'd.

 

Like said above, wattage is fine. 

[B0o0]

9 minutes ago, seon123 said:

That has nothing to do with the PSU wattage

You would get a more accurate estimate by going to random.org and generating a random number.

I got a second opinion from random.org, and now I need 737Watts.

 

17 minutes ago, boggy77 said:

i think 550w should be enough, there must be some other issue.

 

10 minutes ago, schwellmo92 said:

That PSU is fine for your system.

I'm glad to be wrong about needing more wattage, even though the "How many watts do I need" post says 650+ for my setup. Then the real issue might be me misunderstanding crash results when overclocking.

[Meganter]

4 minutes ago, B0o0 said:

I'm glad to be wrong about needing more wattage, even though the "How many watts do I need" post says 650+ for my setup. Then the real issue might be me misunderstanding crash results when overclocking.

Hello,

 

I used to own a 1080ti with a 8700K and they would never use more than 450W at max stress.

 

If you have trouble with overclocking it's either you set a too low or high voltage (probably too low in your case). I run my 8700K at 5GHz, 1.3V.

[SavageNeo]

34 minutes ago, B0o0 said:

got a second opinion from random.org, and now I need 737Watts.

random.org is a random number generator and it hasnt anything to do with psus.

you already have a good enough psu the problem is somewhere else

[GoldenLag]

1 hour ago, B0o0 said:

looked through the posts here to confirm I should have gotten at least 650 in wattage

550w is plenty. 

 

1 hour ago, B0o0 said:

So now I need to look into a proper PSU

the G3 is a propper PSU. 

1 hour ago, B0o0 said:

Afterburner saying it couldn't get the voltage it needs in a scan

1. software readings of voltage from powersupply rails are rather inaccurate
2. UVP on the PSU would kick in before any such issue
3. the input filtering would also compensate. 
4. the voltages it is reffering to are likely not from the PSU rails. 

[B0o0]

48 minutes ago, Meganter said:

Hello,

 

I used to own a 1080ti with a 8700K and they would never use more than 450W at max stress.

 

If you have trouble with overclocking it's either you set a too low or high voltage (probably too low in your case). I run my 8700K at 5GHz, 1.3V.

What a cool coincidence! The MoBo I'm using has a built in OC for the 8700k with the same GHz, and about the same Voltage. I should be content with that since it's so similar. What I still don't understand is how I got poorer GPU performance raising the power limit to 120%, and Core/Memory Clocks by 100/150 in Afterburner? Though, that's probably because I didn't raise the core voltage as you were saying.

[Meganter]

19 minutes ago, B0o0 said:

What a cool coincidence! The MoBo I'm using has a built in OC for the 8700k with the same GHz, and about the same Voltage. I should be content with that since it's so similar. What I still don't understand is how I got poorer GPU performance raising the power limit to 120%, and Core/Memory Clocks by 100/150 in Afterburner? Though, that's probably because I didn't raise the core voltage as you were saying.

That could likely make your PC restart if not enough power, I usually don't OC my GPU, auto OC or gaming mode is usually enough (I don't see much difference) and stable.