A single X11 ASIC holds only a tiny fraction of the total Dash network hashrate. Without a pool, finding a block would be pure luck and, depending on computing power, could take weeks or months. A mining pool bundles the computing power of many devices, finds blocks regularly as a result, and distributes the miner share of the block reward proportionally to the hashrate contributed - predictable instead of random. In return, the pool charges a fee, usually in the low single-digit percentage range.
How PPS, PPLNS and FPPS work in general is explained in detail on the mining pools overview page. The same logic applies to Dash pools: what matters is always the combination of fee and payout model, never a single value on its own.
With Dash, the block reward is already split between miners, masternodes and a treasury system before payout. A Dash pool therefore distributes and prices only the miner share of the block reward - the masternode and treasury shares run outside the pool logic. This difference should be kept in mind when comparing pool statistics with other coins that have no masternode structure.
Besides fee and payout model, what counts when choosing a pool: how close the stratum server is to your own location, the minimum payout, the transparency of the published statistics, and the operator's reliability and track record. Switching pools is possible at any time and takes only a few minutes: simply replace the stratum address in the miner dashboard. Customers who host Dash devices with Cryptohall24 choose their pool freely themselves; our team is happy to help with setup on request.