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Laptop- New Heatsink and Fan not as powerful as the OEM?

I have a Gateway MT6458 laptop whose Fan/Heat-sink stopped working. I replaced the fan/heat-sink with an aftermarket part of the same Serial Number but its not the same brand as the OEM equipment. Now the new fan kicks on but don't exhaust as strongly as the OEM one did. You can barely feel the venting on the new on, whereas the OEM fan felt like a hair dryer on low, it really expelled the hot air. My Question is.. Do these parts come in different power ratings or output, or did I just buy a cheap one and got what I paid for. $10 on ebay vs. $50+ from the Gateway Store.

Public Comments

1. If fan does not speed up when processor is at 100% utilization and gets pretty hot, better replace just the fan. If fan looks like a standard fan, consider quality/hi-performance fans; something like these: http://www.silenx.com/ixtremaprofans.asp