The ECS P45T-A is based on the Intel P45/ICH10R chipsets.
It supports the CPU LGA775 socket for latest Intel® Yorkfield/ Wolfdale/ Conroe/Core 2 Extreme/Core 2 Quad/Core 2 Duo/ Pentium Dual Core/ Celeron Dual Core/ Celeron 4xx processor , FSB 1333/1066/800 MHz. Although it officially suppots the FSB 1333 CPUs, we have no issues running the Intel QX9770 1600 Processor on it. In terms of memory, it supports Dual-channel DDR2 memory architecture of 4 x 240-pin DDR2 DIMM socket support up to 16GB DDR2 800/667 DDR2 SDRAM.
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Original URL, circa 2008: http://my.ocworkbench.com/2008/ecs/P45T-A/g1.htm