"DDR is very cheap just like AMD and u get ripped off for some area inside processor that are extrmely slow." not going to get into an intel/AMD debate here, but in terms of performance:value ratios AMD has intel seriously beat. for the small amount of performance youd gain by buying a new P4 with hyperthreading, you could build a dual processor athlon that would render its socks off. RDRAM also has much higher latency.. which to some is a very high price to pay. personally i prefer DDR, again performance:price ratio.