But the real world scaling doesn't work that way. I was still typing the above comment.. Read what I added. I know it has 3x the core count.. But the issue is real world scaling and the power use, unless they cap it to 350w-450w or that card left to its own devices will use 700w+ if not more. Yes amd have been good with cpus and controlling their power use but start add overclocks and increase voltage and power use limits and then watch the real power use they can pull. We are hitting scary power use now, even my dual 3090s are pulling 420w each and if I move the slider to allow them to use all the power allowed 470w then I see the system hit over 1200w at the wall for gaming and for my work that hammers the gpus and a 5950x at stock the system can hit 1350w and when spiking would be more.
This is my issue with such cards the real world scaling and power use and the heat produced.. If the 7900xt is a pcie gpu it will have a water cooler and will be capped for power use. Meaning you won't be getting anywhere near what it could do unless you stick it on exotic cooling. I don't believe that will be a pcie gaming card but a compute card for a server and the real 7900xt will be something smaller with sameish design with way less cores designed for gaming. I do have a feeling too amd may want to add more compute back into gaming cards because of miners and then they can target them as they lost out to miner sales this time to nvidia.
Also remember the 6900xt has almost 27 Billion transistors and to get to 3x the cores as they state that will be almost 81 Billion transistors and even on 5nm the power use is going to be insane.
The current best gpu is the A100 from Nvidia and that has 51 Billion transistors (with 6912 cuda cores and 432 tensor cores) and the SXM version is 400w and the pcie version is basically power capped to 250w. These are on TSMC 7nm.
https://www.nvidia.com/content/dam/en-zz/Solutions/Data-Center/a100/pdf/nvidia-a100-datasheet.pdf
Check this video:-
A good read here too regarding 7nm/5nm/3nm
https://www.extremetech.com/computing/272096-3nm-process-node
and here
https://semiengineering.com/power-and-performance-optimization-at-7-5-3nm/
and here
https://semiengineering.com/5nm-vs-3nm/
See the other issue is going to be cost to make these gpus on 5nm as 5nm is a lot more expensive to make devices on basically almost double the cost, unless they want us now to pay £2k+ for top end gaming cards, this of course is at the fake msrp and will really be higher ?
TSMC’s 5nm technology is 15% faster with 30% lower power than 7nm, so they say.
So a 6900xt is a 300w card, but a 7900xt is 3x this and on 5nm so 300w x 3 =900w and then with 5nm 30 percent lower power use = 30% of 900 is 270. 900 - 270 = 630. So best case it will be a 630w card for the 7900xt.
So do you want a 7900xt as they state that can use 630w ? That's why I keep saying something isn't adding up to that article being right.
Unless RDNA3 design does some strange things to get to these 3x core (shaders) counts on reduced transistor counts, but again I doubt that as that will mean the core counts are not true and only true in some work loads, like people questioned the Nvidia ampere core counts before and was shown they are true cores not a fake doubling. We just have to wait and see what the real gpu will be when out these rumours never seem to make sense and always turn out to be fake as we have seen many times before.
^.. worth a watch regarding Ampere cuda cores and explained pretty well by him, because people were questioning how nvidia doubled the cores so quickly on Ampere.
I do hope AMD do have something good to keep Nvidia honest next round, but I doubt it will be what they state in that article for the 7900xt.
