Originally Posted by pc-illiterate
the h220 pump is a 3000rpm mcp35x. the ad2 uses an actual mcp35x. other than the obvious rpm difference, the other obvious difference is the pump's cooling. the h220 i assume has the normal flat plate heatsink while the ad2 has an actual extruded/machined aluminum heatsink.
Actually the h220 pump is swiftechs own in house designed pump, not related to the mcp35x. The AD2 does have that heatsink on the pump that the h220 does not have, but Im not sure the h220 even needs it since that pump was made to run at a peak 4500rpm, its capped at 3000rpm on the h220 and 3500rpm on the CM glacier 240L. I can say the h220 does great on my cpu and gpu loop.
One downside to the h220 is that it will only run 3/8" ID hose and the AD2 will out perform it in terms of flow but for a cpu only or cpu and one gpu loop, I dont think the gains will be significant enough if the main goal is to save money. CPU only loop Im sure they will cool the same since the copper plate is the same and flow rate is more than enough for cpu only. Swiftech has even shown the h220 with cpu, sli/cf, and I think 2-3 radiators. If money isnt an object the AD2 would be a better bet though, I just thought to mention the h220 as it shares a lot in common with the AD2 at a cheaper price.
Only other thing I feel I would need to mention is that there are a few failures in the h220 thread, I have had mine for just over 3 months and no issues. The nice thing is that swiftech is VERY on top of their customer service.