I've got a couple of 64gb SSD and think getting point to upgrade them. One of has 870a chipset another intel x58a. Intel has sata 2 intel controller. Sata 3 is Marvell which apparently sucks, but I have installed latest non official patched bios from the web. 240-500gb should be ok £50 each or so. Should I go for sandisc sad or go for ultra or Samsung 860 Evo. Would older boards not make the faster SSD worthwhile?