Bottom Line is the Scythe Ninja is the best!
Your worries are non worries!
Alot of people have mounted the Ninja on an A64 chip...
whats important for you to knopw is that YES the Ninja is compatable with your chip!!
Follow the enclosed directions and you will be fine!!
http://www.scythe-usa.com/
Manufacturer:
Scythe Co., Ltd., Japan
Compatibility:
Intel:
All Socket 478 Processor
Intel Pentium 4 (XE) Processor
Intel Celeron D Processor
Intel Celeron Processor
All Intel LGA775 (Socket T) Processor
Intel Pentium Extreme Edition Processor (necessary fan)
Intel Pentium 4 (XE) Processor
Intel Pentium D Processor
Intel Celeron Processor
Intel Celeron D Processor
AMD:
All AMD Socket 754 Processor
All AMD Socket 939 Processor
All AMD Socket 940 Processor
AMD Opteron Processor
AMD Athlone 64 X2 Processor
AMD Athlone 64 FX Processor
AMD Athlone 64 Processor
AMD Sempron Processor
CPU Clock Speed Limit:
This product is not recommended to use with a high CPU frequency under the fanless mode. If you plan to use this item under fanless mode, your CPU load should be limited to low-middle loading. For high-end usage, we recommend to use an optional 120mm fan. Please use this product at your own risk.
NCU-1000 Fanless CPU Cooler "ZEN" series
Q: Does NCU-1000 work for AMD chip?
A: Unfortunately, the answer is No. Due to heat volume generated from AMD chip & its different socket design, NCU-1000 cannot be installed for AMD chip. NOTE: NCU-2000 , the successor model, IS compatible with Socket 754 for AMD as well as 478 for P4 platform. NCU-2005 is compatible with LG775 Socket, the latest chipset from intel.
Q: I installed the heatsink correctly, but my idle temperature is high.. what's wrong?
A: Please check to make sure your heatsink is securely installed. Touch the top of heatsink (fin) to make sure the heatsink is warm (this is to make sure the working fluid is circulating throughout the heatsink). Make sure to use thermal compound for both CPU die as well as to the copper plate. The ideal idle temperature should be around 35-40C.