Should I buy a Raid Controller for this system?

Question

Hard disks

Good afternoon dear community. I ask you to help in this matter. The thing is, I'm on a tight budget. The GIGABYTE GA-P55-US3L motherboard with the Intel Xeon X3470 server processor has been in stock for 5 years, not so long ago, for my birthday, a friend gave me a Samsung Evo 840 SSD, and as a result, I ran into a SATA3 problem because on this board it simply does not exist. Among other things, there are 2 HDD 250 WDC WD2500AAKX-00ERM SCSI Disk Devices that work almost the same when creating RAID-0 as without creating it. the increase in speed is 2-4%. In connection with this, a question arose. Tell me if I win by buying an inexpensive Raid Controller and is it worth it, and which expansion board should I buy? There is a slot 1 x PCI-E x16 working in PCI-E x4 mode, Will it fit the controller or is there something better? Or maybe the game is not worth the candle. The maximum that I can spend on this business is 750 - 900 rubles. On Ali express found a number of controllers in this price range. Maybe someone can suggest something? Thank you all in advance for your replies. We kindly ask you to keep the conversation on the merits.

Answer 1

Tell me, will I win by buying an inexpensive Raid Controller?

No , rather the opposite.
If you use an SSD for the system, then it will not run into the SATA2 limitation during actual operation.
In synthetic tests, the limitation will be noticeable, in practice it will not.
If you need beautiful pictures in synthetic tests - buy a SATA3 controller, if you don't care about pictures in tests, the main thing is that it works - you don't need to buy anything.

Answer 2

Tell me if I win when buying an inexpensive Raid Controller'a? Is it worth doing it.

From inexpensive - you can remove the loss of information on disks. Not worth it
There is a free pci-e - stick the sata3 extension there