Wowww, its pretty fast!
You use for Noise reduction DP3 or DP3 XD? I guess DP3.
I made some test to compare.
My PC: AMD Ryzen 5 3600 (3.6 GHz, 6 core), Ram: 32GB, old (slow) SSD (not nVME) drives. GPU: Intel Arc B570 10GB GPU. PCIe 3. Win 11.
95 photo , Fuji X-T5 (raw’s from dpreview)
NR: DP3, basic adjustment (contrast, exposure, geometry, lens sharpness, etc). Parallel export: 4. From multiple export run, average: 05:10 → 3.26 sec / photo.
1.9 sec vs 3.26 sec → 0.58 (1.71).
I not do very deep performance comparison with you system, GPU approx 40-45% or less vs RX9070, CPU is similar like 40% or less.
I not do very detailed price comparison, in here (Hungary) Intel B570 vs RX9070 is approx 2.3+, CPU around 3.5x.
If you use DP3 (and not DP3 XD), then: Based on that measurements, if you use DP3 (and not DP3 XD) the Choosing a GPU for DxO Photolab: the answer? - #135 by noir.fonce the chart definitely not true, but hard to say where → for the Intel ARC B570 or the RX9070 or both. That chart used XD2xs, etc, so may not easy to interpolae to current PL version