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This is what I'm seeing that you want to ask:
You want to buy an AMD motherboard that supports Intel processors/CPUs; is that correct?
If so, that is NOT possible. AMD motherboards will ONLY support AMD's processors...and same with Intel. The design & socket type for AMD motherboards are different from the design for Intel CPUs.
The world's two major companies (AMD & Intel) probably don't want the consumer to use the competition's products anyways...
If you are saying that you want to change your motherboard to an AMD compatible motherboard & use AMD CPUs, than you can. As long as the your HP chassis fits the motherboard (size), and that the motherboard stand-off screws support AMD boards then it should be possible.
Cooler Master HAF 932//PhenomII 1090T @ 4.1GHz//ASUS Crosshair V Formula//Thermaltake Frio CPU Cooler// Sapphire Dual-X HD 7970 (OC'ing software being dumb) //8GB (2X4GB) G.Skill RipJaws DDR3 1600 @1600 8-9-8-21-1T//Corsair TX850//WD Caviar Black 1TB//Corsair ForceGT 120GB SSD// Kingston 200 V+ 120GB SSD // LiteON DVD-RW w/ Lightscribe//Windows 7 Ult. 64-bit