Not to worry answered my own question. At idle the new UFO heatsink runs 2 degrees hotter. But the fan is quieter. And when a load is applied....it takes longer for the CPU to heat up. The stock cooler heat ups rapidly...and guessing when the machine is switched off it takes longer for the solid heatsink to dissipate heat than the thing finned UFO custom heatsink. Seems alot more repsonsive at removing heat from the CPU with a much smoother curve
The ASRock ION is running 58C and 59C just running Win Server R2 idle.
The Zotac F series ION in a very small case running Win Pro is running 66C on each processor.
Love both motherboards but the ASRock rules with the 4 SATA slots and 2 eSATA slots. Both run exceptionally well.
I want to replace my ASRock A330Ion's chipset heatsink as well, but I don't know what type of heatsink would work best. I'm not even sure on compatibility of these things! Could you share a link to the one you're using?