Is it possible to increase the write speed of a RAID-5 consisting of an SSD?

Question

RAID

Hello!
There is a Dell server with a PERC H710P Mini controller and a VDisk RAID-5 consisting of 8 Crucial CT960M500SSD1 SSDs
According to the disk manufacturer, the characteristics are as follows:
Sustained Sequential Read up to (128k transfer): 500MB/s
Sustained Sequential Write up to (128k transfer): 400MB/s
Random Read up to (4k transfer): 80,000 IOPS
Random Write up to (4k transfer): 80,000
IOPS in theory, it should still be 20k IOPS, but in fact, utilization reaches 100% with the following indicators for a sufficiently loaded machine used for virtualization:
Device: rrqm/s wrqm/sr/sw/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 0.00 569.00 1593.00 10.11 54.88 61.56 36.81 17.10 0.46
100.00 something to do?

Answer 1

at record RAID5 can rest against calculation of results xor or in their record.
RAID5 is not the best solution for virtualization, RAID10 is better suited for this task.

Answer 2

It is clear that RAID10 is faster, etc., but still there is a financial side, if there are 8 disks in the array, then 7 SSD disks will be used for RAID-5, only 4 for RAID-10, at the price of SSD disks this is significant .
The question is that for RAID-5 and this controller, is it normal behavior to lose 40 times the number of IOPS or not.