cpus & speed

[TheNightMare]

Maybe these are stupid questions, what happened to the cpus speed ?
before little time ago the speed of intel cpus corssed the 3 3.2 .3.4 3.6 GHz and over,,
also i heared that AMD made cpus with 4 GHz ,and i thought we will rach 5 and 6 GHz but now i see new desktops and laptops with 1.3 GHz 1.4 .1.6 and maybe maxium 2.0 GHz
celeron m and others like centrino....etc

is it like this 1.3 centrino = (1.3*2) 2.6 Pentium
1.3 celeron m =(1.3*2) 2.6 celeron ??

and what are the difference between these processors
-the normal celeron and celeron d ,m
also Pentium 4 and Pentium 4m .4d

-Pentium 4 ,Itanium and Xeon

[Cricket]

Originally Posted by TheNightMare Maybe these are stupid questions, what happened to the cpus speed ? before little time ago the speed of intel cpus corssed the 3 3.2 .3.4 3.6 GHz and over,, also i heared that AMD made cpus with 4 GHz ,and i thought we will rach 5 and 6 GHz?

Intel hit a wall with CPU speeds...may have been because the CPUs got way too hot at 4.0GHz. Not sure about AMD. Intel thought the P4 would eventually scale up to 10GHz...they were wrong.

Originally Posted by TheNightMare but now i see new desktops and laptops with 1.3 GHz 1.4 .1.6 and maybe maxium 2.0 GHz celeron m and others like centrino....etc is it like this 1.3 centrino = (1.3*2) 2.6 Pentium 1.3 celeron m =(1.3*2) 2.6 celeron ??

Nope. What you see is what you get. A 1.3GHz Mobile Pentium runs at 1.3GHz.

Centrino is not a processor, it's a technology using the Pentium M processor and i855 mobile chipset.

Originally Posted by TheNightMare and what are the difference between these processors -the normal celeron and celeron d ,m also Pentium 4 and Pentium 4m .4d -Pentium 4 ,Itanium and Xeon

The M in the name indicates it's a mobile processor (for laptops). The D in the Pentium name indentifies it as a Dual Core P4 processor. The D in the Celeron name means it's 90nm processor, it's not a Dual Core processor though.

Itanium and Xeon are workstation/server processors. The Itanium is a pure 64 bit processor. The Xeons are 32 bit workstation processors and I think they're coming out with 64 bit versions now.

Cricket

[kram 2.0]

Subsequently, Intel started adding non-clockspeed related performance boosters to their processors, such as increased front side bus speeds and larger level two cache. As a result, the clockspeed does not accurately reflect the actual performance of the processor - I think this is a fair statement, as AMD has been going it for a long while with its quad digit naming scheme.

Originally Posted by TheNightMare also i heared that AMD made cpus with 4 GHz ,and i thought we will rach 5 and 6 GHz but now i see new desktops and laptops with 1.3 GHz 1.4 .1.6 and maybe maxium 2.0 GHz

No. AMD has not even crossed the 3Ghz barrier - you're caught up on the AMD naming scheme that too many people have associated with the clockspeed.

Originally Posted by Cricket Centrino is not a processor, it's a technology using the Pentium M processor and i855 mobile chipset.

Centrinos that use i855 chipsets are/will soon be off the shelves - as per Intel's announcement. i915 series chipsets ship with current Centrinos which include the LGA775 Pentium-Ms with the larger 533Mhz FSB.

Originally Posted by Cricket The Xeons are 32 bit workstation processors and I think they're coming out with 64 bit versions now.

EM64T versions of Xeons are already on shelves.

Here is a reference to Mobile CPU Technology for further reading.

kram

[spartan015]

isnt it true that even tho AMD has slower cpu speed they can go faster then Intel due to more FSB speed and more cache? like L2 with 1024(kb?) of L2(3?) cache? just wondering thats all.

[glc]

There are just too many variables - actual speed, FSB, cache, and processing pipeline efficiency. You cannot generalize. Also, AMD's are better at some things than Intel, and vice versa.

[rspassey]

The # of Ghz honestly doesnt relate to speed that much, like glc said, there are just too many variables to take account for, http://www.daniweb.com/techtalkforums/thread10565.html might be of interest to you.

[kram 2.0]

Originally Posted by spartan015 isnt it true that even tho AMD has slower cpu speed they can go faster then Intel due to more FSB speed and more cache? like L2 with 1024(kb?) of L2(3?) cache? just wondering thats all.

Just for reference sakes, level three cache on mainstream desktop processors are only found on Intel Pentium 4 Extreme Edition CPU - 2MB of Level Three cache. I believe in both Gallatin and Northwood Cores, though I could be wrong here.

It happens that the greatest difference between the Netburst Pentium 4 and the current K8 generation Athlon 64 is pipeline length. Starting with the newer Prescott Core Processors which implemented PNI (31 stage pipes), clockspeed efficiency declined. Intel's been keeping up with sheer clockspeed, but now things have changed. Intel is going back to adding caches, FSBs, etc.

Ric has a pretty in-debth article on processor pipelining if you're interested in further reading.

kram