I had both QYFS (D0) and Q03J (E0) on Asus W790 Sage. These cpu's are not the same but quite similar. 56Cores max freq 3.7GHz vs 60 Cores max freq 3.5GHz.
From my perspective and experience the difference was not very large, but i slightly prefer the Q03J. Overall the benchmark scores are pretty similar.
Also, Idle power use (at the wall) was quite similar, less than 10% difference with the same settings in linux and bios. 195W for the QYFS D0 system vs 180W for exactly the same system with Q03J E0. System Asus w790E SAGE+2x3090 + 8x32GB mem.
Later i heard that on windows power use could have been tweaked.
I think the most notable difference was that Q03J E0 had similar effective memory bandwidth with 4800MT memory settings compared to QYFS with 6000MT Memory settings.
Which i still do not really understand.
With Q03JI never managed to get the overclock of my Micron 5600MT server memory working, not even at "stock 5600MT". But any way at 4800MT it was just as fast or even a bit faster than QYFS that could overclock the exact same memory to 6000MT or 6200MT.
For every day work i used both for about a month, i preferred the Q03J.
For my personal use cases under long susstained all core loads, (longer than PL times) Say 2 hours 100% load, Q03J was still was about 8-10% faster than the QYFS.
If you already have an QYFS i personally think the upgrade to Q03J is not really worth it.
But If you buy a new system, I would pick Q03J. But it also depends on the price difference.
Comparing the Q03J on w790 Sage to Q0KG on c741 Asrock Rack SPC741D16X-2T with a single cpu and same memory. The Q03J also wins easily, and was actually cheaper.
With Q0KG+ Asrock SPC741 the memory bandwidth is much lower, for reasons unknown to me.
From my perspective and experience the difference was not very large, but i slightly prefer the Q03J. Overall the benchmark scores are pretty similar.
Also, Idle power use (at the wall) was quite similar, less than 10% difference with the same settings in linux and bios. 195W for the QYFS D0 system vs 180W for exactly the same system with Q03J E0. System Asus w790E SAGE+2x3090 + 8x32GB mem.
Later i heard that on windows power use could have been tweaked.
I think the most notable difference was that Q03J E0 had similar effective memory bandwidth with 4800MT memory settings compared to QYFS with 6000MT Memory settings.
Which i still do not really understand.
With Q03JI never managed to get the overclock of my Micron 5600MT server memory working, not even at "stock 5600MT". But any way at 4800MT it was just as fast or even a bit faster than QYFS that could overclock the exact same memory to 6000MT or 6200MT.
For every day work i used both for about a month, i preferred the Q03J.
For my personal use cases under long susstained all core loads, (longer than PL times) Say 2 hours 100% load, Q03J was still was about 8-10% faster than the QYFS.
If you already have an QYFS i personally think the upgrade to Q03J is not really worth it.
But If you buy a new system, I would pick Q03J. But it also depends on the price difference.
Comparing the Q03J on w790 Sage to Q0KG on c741 Asrock Rack SPC741D16X-2T with a single cpu and same memory. The Q03J also wins easily, and was actually cheaper.
With Q0KG+ Asrock SPC741 the memory bandwidth is much lower, for reasons unknown to me.
