I would suggest just getting a standard Sata SSD such as the Samsung 850 Pro as your media drive. The GPU performance is important for Adobe GPU acceleration and I wouldn't use valuable PCi-E lanes on that Z97 board for storage.
For some reason your Newegg links are useless. Eric is the man.
I hope since you have the i7-4770K that you are overclocking it at least a little. You can easily get 4.5 GHz out of it.
Generating thumbnails is probably as CPU intensive as disk intensive.
...you may want to use two or more Samsung 850 Pro SSDs in a RAID 0 configuration off the motherboard to give great performance and much more capacity than the 500GB Samsung 950 Pro PCI SSD. The Crucial MX 200 SSD series offers only a hair less performance at a cheaper price . Only the Samsung and Crucial higher level SSDs have the better controllers that are the best for video editing....i.e. handling " incompressible data", and other features. Crucial SSDs are very reliable. Eric has mentioned that 500GB and above models provide the best reliability.
Only OS, programs, and Windows page file should be on the "boot drive". All else should go on that SSD RAID 0. The 2 TB spinning drive can be the backup for your RAID 0.
Example : 3 Crucial 500GB MX 200 SSDs cost $139 each today at new egg...$417 total cost for 1.5 TB capacity compared to around $350 for a 500GB Samsung 950 Pro....without considering adapter card.
Below is a link to the performance test of 3 MX 200s in RAID 0 :
you will see for "incompressible data" a read speed of over 1.2 GB/second and a read speed of 645 MB/sec. Three Samsung 850 Pro SSDs actually performed slightly WORSE in the exact same test by tweaktown with incompressible data.
A 2 TB 7200 rpm spinning disk has TERRIBLE performance compared to the RAID 0 I described, or, even just asingle SSD, like Eric described. Under the BEST conditions with a quality "enterprise level" HDD equipped with 128 MB of cache, a maximum of 200MB/sec can bee achieved, read and write, on an empty drive. However, the performance will drop to half that when the drive is close to being filled, and will drop FURTHER if not "defragmented". In addition the "latency" of the HDD impedes performance,,,,ESPECIALLY if there are multiple streams of video trying to come off of that drive during editing.
A RAID 0 of 3 MX 200 SSDs will provide at least 3 to 6 times the speed of your current disk drive ! The speed of your " media drive" is very important.
Thanks for the advice! From the research I have done, going from x16 to x8 PCIe lanes for my graphics card would have negligible effect on real world performance because x8 still has very high bandwidth. Do you think that Adobe GPU acceleration would noticeably suffer if I dropped my GPU down to x8 lanes?
Going from x16 to x8, as Bill had demonstrated, increased the encoding time from PPBM's MPEG-2 DVD timeline by about two seconds when using a higher-end GPU. So yes, there will be a slight loss of performance.
The amount of PCi-E lanes required for the GPU is dependent on which GPU you have. The higher end 900 series cards are definitely making use of the 16 lanes of PCI-E 3 which means the coming Pascal 10xx cards will most definitely use the 16X lanes. Keep that in mind before using PCI-E slots for storage.
With new higher-end GPUs utilizing close to the full bandwidth of PCI-e 3.0 x16, expect more than a few-second difference. The reason why re