750 W PSU for 6800XT asking for 850 W?

[RaphaNadal]

Basically what the title says.

 

I bought a Super Flower 750 W Leadex III 80+ Gold PSU (rated very highly on the LTT PSU Tier List). It has two 8-pin PCIe power connectors.

 

The regular 6800XT's recommend 750 W, but some OC'ed ones recommend 850 W.

 

Is this simply a case of the video card manufacturer protecting themselves against lower-quality PSUs? 

 

I'm assuming that 65-70% of PSU wattage is the upper limit of what's acceptable for sustained use. 

 

I think my PSU should be able to handle a total system power draw of 500-525 W on a sustained basis over a 5-year period, that should be typical for these OC'ed 6800XT's, based on my guess.

 

I am basing this power draw estimate of OC'ed 6800XT drawing 50-75 W more than the stock 6800XT cards (which draw ~300 W stock and ~340 W OC from the reviews that have appeared thus far, such as Gamers' Nexus).

 

Edit: Rest of my system:

 

Mobo: Gigabyte B550 Aorus Pro

CPU: Ryzen 7 3700X with no OC other than PBO, air-cooled with Noctua NH-U12S

RAM: 2x16 GB G.Skill Ripjaws V CL16 3200 MHz

Crucial MX500, Seagate 2TB Barracuda

 

 

[CommanderAlex]

12 minutes ago, RaphaNadal said:

Is this simply a case of the video card manufacturer protecting themselves against lower-quality PSUs? 

There is a probability of being more for different versions of cards with custom BIOSs and adjusted voltages to boost the core clock speeds higher, thus requiring higher wattage PSUs due to higher loads on custom BIOS cards, not really so for against lower-quality PSUs. 

13 minutes ago, RaphaNadal said:

I'm assuming that 65-70% of PSU wattage is the upper limit of what's acceptable for sustained use. 

That seems plenty reasonable for the maximum PSU efficiencies, but more like 50-70% peak. 

 

Overall, your system should be fine with that PSU unless you are doing custom water cooling and multiple RGB lighting strips/"glitter". 

[MadPistol]

My system is extremely similar to yours, but I have an RTX 3080, which uses even more power.

I have an EVGA 750-watt Gold PSU, and according to my APC UPS, at "peak" my system is sucking down about 500-watts. 450-watts is normal for most gaming sessions.

 

The PSU you listed should be fine.

[RaphaNadal]

1 hour ago, MadPistol said:

My system is extremely similar to yours, but I have an RTX 3080, which uses even more power.

I have an EVGA 750-watt Gold PSU, and according to my APC UPS, at "peak" my system is sucking down about 500-watts. 450-watts is normal for most gaming sessions.

 

The PSU you listed should be fine.

@MadPistolOff-topic - how do your HD598's compare with HE400i? I'm trying to decide between the two. Headphone amp would be DragonFly Black or Red

[MadPistol]

1 minute ago, RaphaNadal said:

@MadPistolOff-topic - how do your HD598's compare with HE400i? I'm trying to decide between the two. Headphone amp would be DragonFly Black or Red

HD598 - vastly more comfortable, neutral sounding.
HE400i - heavier, far more detailed in highs, mids, lows. Massive sound stage.

For long listening sessions: HD 598.
For critical listening sessions: HE400i.

Hopefully that is clear as mud lol

[RaphaNadal]

2 hours ago, MadPistol said:

HD598 - vastly more comfortable, neutral sounding.
HE400i - heavier, far more detailed in highs, mids, lows. Massive sound stage.

For long listening sessions: HD 598.
For critical listening sessions: HE400i.

Hopefully that is clear as mud lol

@MadPistolIt is clear as mud like you say, so I'll buy the Sundara for my next purchase. Never had planar headphones before, I have a V-Moda V-80 and a Sony WH-1000XM2.

 

I'm looking for something more resolving and for longer listening (1-2 hour-ish) 

[Ankerson]

8 hours ago, MadPistol said:

My system is extremely similar to yours, but I have an RTX 3080, which uses even more power.

I have an EVGA 750-watt Gold PSU, and according to my APC UPS, at "peak" my system is sucking down about 500-watts. 450-watts is normal for most gaming sessions.

 

The PSU you listed should be fine.

 

 

That an FE 3080, they don't really pull that much wattage.... Around 320W or so.....

 

The AIB cards, especially the 3X Pin models pull a lot more, one heck of a lot more power, 150W to almost 180W more depending.

 

 

[RaphaNadal]

2 minutes ago, Ankerson said:

 

 

That an FE 3080, they don't really pull that much wattage.... Around 320W or so.....

 

The AIB cards, especially the 3X Pin models pull a lot more, one heck of a lot more power, 150W to almost 180W more depending.

 

 

The 6800XT should be more power efficient though, right? That seems to be the case based on benchmarks.

 

I bought the Leadex III based on your helpful advice months ago, I want to buy a card that will be served well by that PSU and not tax it excessively in the long run. 

[Ankerson]

5 minutes ago, RaphaNadal said:

The 6800XT should be more power efficient though, right? That seems to be the case based on benchmarks.

 

I bought the Leadex III based on your helpful advice months ago, I want to buy a card that will be served well by that PSU and not tax it excessively in the long run. 

 

Maybe, they have only tested the FE cards so far however.

 

I would say a 750W is a safe bet, or if you want more room to upgrade later to another GPU that may draw even more then get an 850W.

 

I think you will be fine.

 

I doubt they will pull more than 375W so you are good.

 

The 3080's and 3090's pull more wattage than we all thought they would, a lot more....