Hi all,
Now when I took out the forst card and tried the Blizzard, one thing that scared me is when I popped the Blizzard in, I got some weird lines on the screen (akin those that flash sometimes on loading screens)
This is normal for Blizzard cards

and then the infamous software error...
Which error? I don't know of any infamous software errors.
I booted with both buttons, screen came up fine, booted into a floppy with sysinfo and all looked good too. Then I remembered the seller also gave me a CF with the blizzard. Is this behaviour because I need to install some kind of driver for it to work with whdload/workbench? (And even bootup at all).
Nope. What Blizzard 1230 is it? III or IV perhaps? Does it have 68882 FPU chip as well? Is it full 68030 with MMU, or just 68EC030?
Booting a sysinfo floppy (or a workbench floppy) runs just fine.
Would be useful to know which version of sysinfo, and what sysinfo says about your system, not just that it runs.
Also regarding the RAM, when I check sysinfo, it seems with the Blizzard card it states the memory priority is 10. But with the other card, it seems the priority is 40?
Doesn't matter.
Which is the better of the two cards to keep?
I would most likely kept the Blizzard, especially if it is 1230-IV with full 50MHz 68030 and 68882.