CPU speed?

A computer shop once told me to go for a CPU speed higher than say, 3.4 GHz, would be useless. They said it doesn't do anything more. They said, if you increase the numerical speed above that, say, to 4.0 GHz, it doesn't increase the actual speed much, if at all. This doesn't seem to be true. Any comments?
 
Complete BS. It is true at a point though, extreme overclockers just going for records like when they got the world record of over 8GHz, will lose its effectiveness at a point, but performance scales with the speed past 5GHz as far as I know.
 
Mate, like most computer shops, they're techs, not engineers and know very little at the end of the day. Why? Becuase they spend all day building and selling low end AMD rubbish to the masses. High end machines with multiple graphics cards, high workloads, workstations and video encoding benefits from clock speed. 5GHz on a 2600K rapes the 3.4Ghz stock. Clock speed is still king.
 
Mate, like most computer shops, they're techs, not engineers and know very little at the end of the day. Why? Becuase they spend all day building and selling low end AMD rubbish to the masses. High end machines with multiple graphics cards, high workloads, workstations and video encoding benefits from clock speed. 5GHz on a 2600K rapes the 3.4Ghz stock. Clock speed is still king.

Do you just follow me around?
 
yeah, AMD just launched 2 4.7 and 5GHz processors, but they cost like 320 and over 800 even though they are only on level with the 300 buck i7's that run 3.4GHz and can be overclocked
 
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