Free wire-melter with every purchase - AMD Senior VP predicts 700 watt GPUs by 2025

[leadeater]

On 7/15/2022 at 2:44 AM, Donut417 said:

Read somewhere that breakers can’t do sustained max, they are actually only rated for 80% and the max rating is more or less a peak amount it can handle. 

It actually depends on many factors and the designed load type the breaker is supposed protect.

 

 

 

 

The curve represents heat, there are two different metals that have different expansion rates and when the difference over time gets large enough the pressure/force from the difference in expansion trips the breaker. The hard downward line of the curve is the instantaneous trip from electromagnetic force.

 

Different break types have a different design for how long it can sustain based on heat and also instantaneous trip current. Thing like motors have very high startup current so you want a breaker that allows for this, however you don't want that on a typical household electrical outlet.

 

As to why  breaker may trip for a load under it's rated current that's actually because this rating is done at a set temperature and humidity so deviation from these changes the actual long term trip current for the break.

 

80% is just an easy rule of thumb that will always be "safe" aka no unexpected trips.

[AnonymousGuy]

On 7/14/2022 at 7:44 AM, Donut417 said:

Read somewhere that breakers can’t do sustained max, they are actually only rated for 80% and the max rating is more or less a peak amount it can handle. 

You're thinking of the NEC requirement that for sustained loads (typically electric car charging) you're supposed to derate the circuit to 80%.  Like it's 50A capable (wiring + circuit breaker) but you limit the charger to 40A.

 

There's also derating based on ambient temperature.  And multiple conductors in the same conduit.  It's easy(ish) in really extreme environments to have to build for nearly double the expected current because of derating.

 

The goal is to not melt the insulation on the wiring in the wall.

 

I think you don't see 1800W power supplies (at 120V) is because there's some tolerance on the circuit breaker rating so you don't want to be riding it at 100%.  Or they have to size it assuming it may run at 110V.

[Chiyawa]

Well, if we stick with 1080p 60Hz, we might not need a GPU that chug 700W of power.

[ravenshrike]

On 7/11/2022 at 4:01 PM, Mel0n. said:

Damn what are they doing over at AMD, putting FX processors on GPUs? 

From all indicators, they've managed to get their multi-chip module tech working finally. So that 700 watts is 2-4 graphics chips theoretically running on the same board, along with necessary memory etc...