45 nm VS 65 nm?

Which is faster and better to buy a processor's manufacuring tech 45 nm or 65 nm ?
I noticed that, in Intel C2D 65 NM ALLWAYS has less buss speed than the equivelant 45 nm processors, and sometimes has less cashing also.

which is a better chioce 45 or 65?

 

Unless you've got a thing for last-gen technology, 45nm is the way to go...

 

45nm fo shizzle. When going processors, size does matter.... inversely.

 

45nm is better of course. Why get older processors?

 

smaller manufacturing process = less power consumption = less heat = better performance.

ergo, 45nm is the way to go.

 

Well!
So it must be something elss I had in mind!

Regarding Vista 64 bit, I've read some processors can handle much amount of data to ram, thus can take advantage of Vista 64.
If not the nm tech, what is the isuee that determine how much a processor make use of Vista 64?

 

It is realy not nm tech, but can any body help me understand this article and find out if a certain processor can take the full out of Vista 64bit?

read this please!

 

45n is the later version of 65nm, meaning its having larger VLSIC design in a smaller fabrication...with smaller gate width fanin fanout decreases ......resulting in lower stress capacitance(power loss in integrated circuits) in each of the connecting transistors.....in a whole less thermal energy is released.......for which the default clock of the component can be set to higher value(than that of the larger fabrication one.....65nm) without bothering about heat issue..............this also helps the unit to be more power efficient......so with same power input an area.....more transistors can work together.......giving out much much more performance

 

Wow. That's very vaguely detailed.

@ahmedhosny
Whether or not a processor can do x64, it just depends if there's 2 cores. In other words, if it's 2 cpus instead of 1.

AMD's Turion x2, Athlon x2, etc are 64bit capable. (Because of the "x2")
Intel's Core Duo, Core 2 Duo, Quad Core, etc are 64bit capable. ("Duo" means 2 and "quad" means 4.) As long as the processor has that, it can do 64bit.

If you want, you can just tell ups the name of the processor that you're interested in, and we can reconfirm if it's 64bit

 

Maybe I'm mis-interpreting your post, but the number of cores on a processor has nothing to with its 64bit capabilities. There have long been single-core Athlon 64s that are 64bit capable and dual-core Core Duos (Yonah core) that are not 64bit capable.

 

Wrong...

The design of the processor determines if it is EMT64 / x64 compatible and not the number of cores.

AMD has been totally 64bit compatible since they changed to integrated memory controllers, this includes the single and dual core chips.

Intel got it a bit wrong with 64bit on their first attempt (which was slightly before AMD I believe) by trying to force a 64bit only CPU to market and relying on slow emulation software to make it backwardly compatible with 32bit software along with re-writing the whole instruction set meaning O/S software would have to be re-written to work with it. This did work for some very large business users where it made some headway but for home users and smaller businesses it was an expensive product. Intel eventually added x64 to the Core 2 line of processors with EMT64 and their newer P4 chips but the Core Duo and Core solo range never did support x64 at all because they are missing the EMT64 instructions by design.

 

Oh.. I didn't know the details.. I guess you learn something new everyday..

 

What is EMT64?
So I guess the bottom line for practicality that any modern Core 2 Duo and up can utilize Vista 64 in it's full capacity.
Am I right?

 

Have a look at this article.

And yes C2Ds can utitize Vista 64 in its full capacity.

 

Finally!

Smaller is better.

 

Thank you all for the help!
Now again to concentrate on the GPU and Processor speed, bus, ... etc

 

Need some advice. Have Asus C90S with e6600. Would like to upgrade to a e7300 45nm processor. Is this processor compatible with the 945g chipset or will it not post?

 

King of internets!
I advice you to open a new thread to find some help and for your question to be seen.