Passive Skill shards Stack

[Crowmanhunter]

When a passive shard is upgraded to max rank, it becomes a skill shard and always on. But if you equip it anyway, you actually get double the bonus.


Uncertainties:
Not sure if it doubles everything across the board or just some raw stats.
Take the Greatsword shard for example. I know that equipping a Greatsword shard gives me additional attack power on top of the passive Greatsword shard. But I don't know if it necessarily makes my attack speed any faster. I've never really noticed a significant difference in attack speed no matter how much I ranked it up, and I don't have any means of quantifiably measuring attack speed, so it's hard to say. So if anyone knows more information or wants to do any additional testing to see what exactly stacks, that'd be awesome.

New Findings:
Red Rememberence scales differently between the Skill and Passive Shards.
Glitch(?) can occur that causes you to gain benefit of two shards when only 1 is equipped.

[Hustler Bo'Jenkins]

There seems to be a cap on attack speed increases.

IDK where it is or how much to equip, because I haven't really tested it.

There's either a place where my attack speed stops going up, or the attack speed increases are multiplicative, so they're giving me a smaller and smaller bonus each time, meaning they have a soft cap, where adding more is simply not doing enough to justify equipping it over other types of bonuses.

Or, I'm totally wrong and attack speed is just broken and it's all a placebo.

[trent8086]

There is a cap to the total attack speed you can get. I had maxed Optimizer and Optimizer Skill shard and the attack animation was the same for successive attacks even with or without the book from OD. Taking off the Skill version of Optimizer slowed the attack speed a little, but the real kicker was taking it off as a Passive Shard. That really had a noticeable change.
So it seems that Shards in the Passive Slot offer a higher bonus than when they become actual Skill Shards. I believe this is because the "Skill Shard" versions have 0 Grade upgrades. So a Passive Shard at Grade 9 will always be better than its un-graded Skill Counterpart. But not having to have it equipped is fine for a lot of the effects like Detective Eye, Words of Wisdom, Money is Power, etc.
You can see the effect most easily with the Regenerate Shard. You heal fastest with the Passive Shard and Skill Shard both equipped, second fastest with just a Passive Shard (Grade 9), and third fastest with just the Skill Shard.

[Kyutaru]

Animation doesn't matter for attack speed. I can link you videos showing how insanely fast your damage numbers will spam across the screen if you have maxed out your attack speed with all the shards and items endgame.

[Crowmanhunter]

So I've been doing so experimentation and these are my findings.

Red Rememberence scales a little differently between the skill shard and the passive shard. Fully maxed out at 1 hp, the skill shard gives about +30 to all stats. But if I equip the passive shard, it gives a MASSIVE +100 to all stats for a total of +130 to all stats for equipping both.

Also been noticing a weird occurrence when farming shards. I was farming sword enhancement shards and whenever I got one, it would bump my atk power up to as if I had both the passive and the skill shard equipped at the same time. Merely hovering over the skill shard causes the numbers to reset, so I don't think this is supposed to be intended.