View Single Post
  #14 (permalink)  
Old June 1, 2013, 09:50 AM
Sagath's Avatar
Sagath Sagath is offline
Hall Of Fame
F@H
 
Join Date: Feb 2009
Location: Petawawa, ON
Posts: 2,540

My System Specs

Default

Quote:
Originally Posted by FreeKnight View Post
Is it at all possible that the integrated graphics into the Sandy Bridge, Haswell, etc platforms are part of why processor speed hasn't really seemed to significantly increase? I don't think it's as simple as 'it's taking horsepower space on the chip', but I'm curious as to if it's part of why the clock speed increases haven't been dramatic, or if it's a matter of the limits of silicon, marketing or something completely different (I'm not particularly knowledgeable on the CPU structures, limits and inner workings).
A lot of the reasons why clock speed hasnt ramped can be boiled down to the fact that frequency isnt the limiting factor in making things run faster. That sounds like a hypocrisy, but its not; Somewhere else is usually the bottleneck, and not at the 'processing' level due to speed. It is referred to as "Transmission Delay" (or at least that is how it was relayed to me ). This is why more cores started getting added. You can thus process more information in an equal time. For example, in perfect theory (and parallelism) it takes two cores at 2ghz to process the same amount of information as one core at 4ghz. This obviously doesnt take in to account a slew of factors that change this, but it gives a great idea.

In addition to that, there are also the physical limitations. Thermally, things get out of hand as clock speeds ramp up. Having transistors switch on and off (or going from 0v to 1v in real terms) takes time. Gate leakage in your transistors occurs. etc. Essentially we're limited by the properties of the silicon, and the laws of Physics.

The Prescott era processors were a great example of the problems with ramping clock speeds unduly, and the problems associated with it.
__________________
Quote:
Originally Posted by Lpfan4ever View Post
AKG shot the hamsters, and then Perineum drove his Mustang with summer tires into the server.
My Disclaimer to any advice or comment I make;
Quote:
Originally Posted by CroSsFiRe2009 View Post
I'm a self certified whizbang repair technician with 20 years of professional bullshit so I don't know what I'm talking about
Reply With Quote