[SOLVED] Can my PSU support the RX 6900 or RX 6800? New to PC gaming and building.

[Milkbox]

Hi, I'm fairly new to PC building and upgrading. I'm looking to nap the RX 6900, or RX 6800 in the future. I read the minimum wat for the RX 6900 is 850 W, and the minimum for the RX 6800 is 750 W, at lest according to the website.This is my PC.Now, I realise I have a 750 W PSU, but I've read the some people say not to be too concerned with a minimum wat on a GPU. Even when I've used various online PSU calculators, and included my build, along with the 6800/6900, is says I need 600 or less wat across several tests.

• 1 x Lian-Li Lancool II Mesh RGB Midi-Tower Case - Black
• 1 x MSI MPG B550 Gaming Edge WiFi (AMD AM4) B550 ATX Motherboard
• 1 x AMD Ryzen 9 3900X Twelve Core 4.6GHz (Socket AM4) Processor - Retail
• 1 x Scythe SCFM-2000 FUMA 2 Dual Fan CPU Cooler - 2x120 mm
• 1 x Gigabyte GeForce RTX 2070 SUPER Gaming OC 3X 8192MB GDDR6 PCI-Express Graphics Card
• 1 x Super Flower Leadex III 750W 80 PLUS Gold Modular Power Supply - Black
• 1 x Team Group Vulcan Z T-Force 32GB (2x16GB) DDR4 PC4-25600C16 3200MHz Dual Channel Kit - Grey
• 1 x WD Blue SN550 1TB NVME M.2 2280 PCIe Gen3 Solid State Drive (WDS100T2B0C)
• 1 x Seagate 2 Tb Barracuda 7200
• 1 Gaming Mouse
• 1 Gaming Keyboard
• 2 Monitors (1 22'' - 1 28'')
• 1 USB charger (my fitbit)
• 1 USB charger (PS4 Controller)
• 1 Headset

So, explaining it to me like I am five, why exactly are some people saying not to worry about the minimum wat. but the website gives a minimum?

 

[NightHawkRMX]

You should not have any issues running either GPU on that PSU. The power consumption of the 6900xt card is around 300w.

Running prime95 and furmark at the same time your pc would probably not draw more than 600w, and even that is an unrealistic workload

 

[Milkbox]

You should not have any issues running either GPU on that PSU. The power consumption of the 6900xt card is around 300w.

Running prime95 and furmark at the same time your pc would probably not draw more than 600w, and even that is an unrealistic workload

Alright. Awesome. So, like, since I don't really understand, why do they recommend PSU with like 850 or 750. Do they leave a large margin for any reason?

 

[jonnyguru]

Alright. Awesome. So, like, since I don't really understand, why do they recommend PSU with like 850 or 750. Do they leave a large margin for any reason?

Because there are transient spikes that are double the measurable static power measurements you're seeing and if a PSU's secondary caps can't support those, the OCP or OPP kicks in.