Quad core and core 2 quad

Solution
core 2 quad is a brand name, quad core means that the CPU has 4 cores, a Core 2 Quad is a quad core but only a few quad core CPUs are Core 2 Quads.
i5's, i7's, Athlon II x4's, Phenom X4's, Phenom II x4's are all quad core CPUs but are not Core 2 Quads.
core 2 quad is a brand name, quad core means that the CPU has 4 cores, a Core 2 Quad is a quad core but only a few quad core CPUs are Core 2 Quads.
i5's, i7's, Athlon II x4's, Phenom X4's, Phenom II x4's are all quad core CPUs but are not Core 2 Quads.
 
Solution