[SOLVED] Do I need a better PSU for 6800XT or 650W will be enough?

[hellzer]

Current spec:

Ryzen 7 3700X 3.6Ghz (stock cooler but BIOS auto-clock enabled or whatever it's called)
Gigabyte X570 Aorus Elite mb
GEFORCE GTX 1080 ARMOR 8G OC GPU (want to replace this)
G.SKILL Flare X 32GB 3200MHz CL14 DDR4 KIT RAM
2x Samsung Evo SSD's (850 & 860 models) and 1 HDD
RM 650x PSU - 650W
Zalman Z7 Neo ATX Mid-Tower Black (4x120mm fans)

Standard keyboard & mouse, no controllers or any special devices.

So... I am picking either ASUS TUF GAMING Radeon RX 6800 XT OC 16GB or Gigabyte Radeon RX 6800 XT 16GB GAMING OC (got a recommendation here for either one?) and 2K 27" LG 27GL850-B, IPS monitor.

What I mainly wanted to ask you guys is if I should stay with 650W PSU or it would be some sort of a risk?
Advanced PSU calculator is showing me these numbers:
Load Wattage:642 W
Recommended UPS rating:1250 VA
Recommended PSU Wattage:692 W

However, I have manually up'ed the clocks for GPU and CPU given by HWinfo's highest values. And I am not sure my clocks and voltages are correct:

https://imgur.com/4q3Dzxq

View: https://i.imgur.com/4q3Dzxq.png
(anyone care to check this?)

Thanks in advance.

 

[Archaic59]

Current spec:

Ryzen 7 3700X 3.6Ghz (stock cooler but BIOS auto-clock enabled or whatever it's called)
Gigabyte X570 Aorus Elite mb
GEFORCE GTX 1080 ARMOR 8G OC GPU (want to replace this)
G.SKILL Flare X 32GB 3200MHz CL14 DDR4 KIT RAM
2x Samsung Evo SSD's (850 & 860 models) and 1 HDD
RM 650x PSU - 650W
Zalman Z7 Neo ATX Mid-Tower Black (4x120mm fans)

Standard keyboard & mouse, no controllers or any special devices.

So... I am picking either ASUS TUF GAMING Radeon RX 6800 XT OC 16GB or Gigabyte Radeon RX 6800 XT 16GB GAMING OC (got a recommendation here for either one?) and 2K 27" LG 27GL850-B, IPS monitor.

What I mainly wanted to ask you guys is if I should stay with 650W PSU or it would be some sort of a risk?
Advanced PSU calculator is showing me these numbers:
Load Wattage:642 W
Recommended UPS rating:1250 VA
Recommended PSU Wattage:692 W

However, I have manually up'ed the clocks for GPU and CPU given by HWinfo's highest values. And I am not sure my clocks and voltages are correct:

https://imgur.com/4q3Dzxq

View: https://i.imgur.com/4q3Dzxq.png
(anyone care to check this?)

Thanks in advance.

The RX 6800 XT can spike to around 500 watts or so for a few milliseconds during heavy gaming. Add that to the rest of your system and it will probably go over the rated capacity of your PSU. Most of the time, while gaming, it will stay under 350 watts with a system total under 500 watts. The RM650x is pretty good and can probably handle the spikes, but, if you get random system shutdowns you'll need more juice. A higher capacity PSU with more headroom would be better IMO.

 

[LazerTechX]

Its within spec, but if you encounter random shutdowns/crashes or gets hot to the touch while gaming, I would recommend getting a beefier PSU. 750W or 850W would be great. For me personally i would opt to upgrade to a better PSU to leave some breathing room.

 

[hellzer]

The RX 6800 XT can spike to around 500 watts or so for a few milliseconds during heavy gaming. Add that to the rest of your system and it will probably go over the rated capacity of your PSU. Most of the time, while gaming, it will stay under 350 watts with a system total under 500 watts. The RM650x is pretty good and can probably handle the spikes, but, if you get random system shutdowns you'll need more juice. A higher capacity PSU with more headroom would be better IMO.

Would the old cables from RM650x be viable still if I bought RM750x? I wouldn't need to unplug them and re-arrange anything. Since those PSU's are modulator I could just switch them up and done?

 

[AvroraBg]

Would the old cables from RM650x be viable still if I bought RM750x? I wouldn't need to unplug them and re-arrange anything. Since those PSU's are modulator I could just switch them up and done?

honestly i will go for 850w not the 750w version of the rmx if u can afford it

 

[hellzer]

honestly i will go for 850w not the 750w version of the rmx if u can afford it

Actually if I am about to upgrade my PSU, I might as well grab RTX 3080 VISION OC 10GB for 200 euros cheaper than 6800 XT (ASUS TUF GAMING Radeon RX 6800 XT OC 16GB). The price just makes more sense.
Also RTX 3080 manufacturers recommended a 750W PSU however and manufacturers always recommend more than actually is required.

So why 850W? I am not running any advanced peripheral devices, no custom coolers, no liquid cooling, 1 monitor only...

Plus (no pun intended) efficiency would be lower on the 850W which would meat it would consume more electricity than 750W running on higher efficiency.

 

[AvroraBg]

Actually if I am about to upgrade my PSU, I might as well grab RTX 3080 VISION OC 10GB for 200 euros cheaper than 6800 XT (ASUS TUF GAMING Radeon RX 6800 XT OC 16GB). The price just makes more sense.
Also RTX 3080 manufacturers recommended a 750W PSU however and manufacturers always recommend more than actually is required.

So why 850W? I am not running any advanced peripheral devices, no custom coolers, no liquid cooling, 1 monitor only...

Plus (no pun intended) efficiency would be lower on the 850W which would meat it would consume more electricity than 750W running on higher efficiency.

firstly sorry for the late response
i am not deeply familiar with the topic that you asked, but i can tell you what i have been reading the last couple of months from the ppl in the forum who give advices to ppl like you that need info about which psu to buy.
so to keep this in short almost all of them will tell you this - 750w psu will be ok if the brand is descent like corsair, seasonic, be quiet and some others, but they usually will tell you that if u can pay a bit more they recommend 850w or bigger, just to be extra sure about the gpu casual spikes during heavy gaming and such. i myself went forward and bought 1000w corsair after months of research on the market and waiting for them to come in stock because i wanted the older version of the rmx corsair 1000w but in the end it was out of stock for weeks so i bought 1000w 2021 version. paid about 35 euro extra for it when compared to the 850w rmx 2018 version.
i know its overkill but i did that to keep my mindset free of the thought that after 3-4 years when i upgrade gpu/ cpu i will need to pay for new psu aswell in order to get more wats. plus i want to keep my psu to work around 50-60 percent of its capacity in order to keep him more silent and the fan to spin less offen and slowly.