Can I install a SSD on an optical drive in a HP Envy Phoenix

I just purchased a customized HP ENVY Phoenix Desktop - 810-350se CTO with a Raid 5 configuration (3 x 2 TB), but I noticed and researched that it seems that is better to have a SSD installed to have your computer access data faster, of course, I want to use it for the OS installed on it.  So I have two questions?
1.) Can I change the configuration so I can add an SSD on a optical drive? (This will be the 4th drive). Since I am already using 3 HDD on a Raid 5 configuration and there wouldn't be any more space left, I am assuming that I can only use an empty optical drive space and install an SSD?
2.) Is there a limitation of how many drives and capacity HDD can be installed on the motherboard? 
My proposed solution is to keep the 3 HDD and install a  4th drive (SSD) on the optical drive and use it for the OS (Windows 8.1).
Any suggestions and/or recommendations is highly appreciated it.
Thank you.
3rd Generation Intel(R) Core(TM) i7-4960X processor
•4TB 7200 RPM SATA 6G RAID Hard Drive
This question was solved.
View Solution.

Hi,
Your PC is already using a Windows 8 boot loader and if you load the SSD in UEFI mode then you will add another Windows 8 boot loader to the eligible boot device menu.  This will lead to confusion.  I would suggest that you avoid this situation by trying the following procedure:
Be sure to create the external HP recovery media
Install the SSD on port 1 or 2
Disable secure boot in the BIOS and switch to legacy mode
Boot into the Intel OPROM and rebuild the RAID 5 array
Boot back into the BIOS and enable UEFI mode
Boot the external HP recover media and load the SSD (SSD recommended size is 240 GB or larger)
Once you are up and running then go into Disk Management and format the RAID array as GPT
The above procedure may or may not work but it's what I would first try.
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP Photosmart Premium C309G, HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4770k,Z-87, 8GB, Vertex 3 SSD, Samsung EVO SSD, Corsair HX650,GTX 760
Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT

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