- Insufficient memory. You need 32+ GB
- Insufficient PSU. You need at least 750+ W Gold label or better.
- Corsair Hydro is noisy and costly and performs no better than a good air cooler like Noctua.
- Conventional HDD's are ill-advised. Better use Samsung 850 Pro SSD's
Do you mean change the WD's for SSD's?
Have to win the lottery first.
How about 2 x 10.000 in raid 0?
A bit overstated, IMO. Don't forget that a raid0 doubles the risk of complete data loss over a single disk, HDD's show a significantly higher failure rate than SSD's, Fill rate degradation is a serious performance problem with HDD's, not so with SSD's. Conventional HDD's in raid0 are still much slower than a single SSD.
If you can choose between 2 Velociraptors in raid0 (not a very sound idea with precious source media) of WD1000CHTZ, 1TB à € 250 each, or a single Samsung 850 Pro, 1 TB à € 440, not only is the SSD solution less expensive, it is also faster, safer, and gives better longevity. Note that because of fill rate degradation of HDD's, 2 x 1 TB is somewhat comparable 1 TB SSD capacity. Transfer rates of a raid0 of 2 HDD's would be around 300 MB/s, a SSD shows around 500 MB/s and the latency of the SSD would be far better than the raid.
XAVC with 300 Mb/s takes up quite some space and requires high transfer rates, hence the suggestion for SSD. A WD Black can be used for backups of source media and for exports. Don't forget that export files are only written at the very end of the complete exporting process, and at that moment transfer rates are almost insignificant compared to the heavy lifting done during the encoding process. Exporting a large 10 GB file (far too big for web delivery) may take around 45 seconds less when exported to a single HDD instead of to a SSD, but in light of the total export time with the encoding, those 45 seconds are hardly worth mentioning.