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Hyper-threading in Core2Duos

The HT coming in Nehalem is slightly different. It has a lot more conditions in the pipeline that can trigger it to come into play. That was one of the drawbacks of NetBurst, there was only a small handful of intructions that could trigger the HT to 'come alive'. HT will become more and more important as multi-core starts scaling up to 4-way and 8-way cores.
 
just a thought bout that, am i right in saying that HT is 'Virtual-cores', so the latest quadcore cpu simply dont need HT as they have multi physical core???
 
HT allowed for work to directed onto parts of the cpu that would have been idle otherwise and that could apply to multiple cores still I think
 
I dont know if this is a result of HT, but have you people noticed that Pentium 4 based PCs are more responsive, snappier in Windows functions? Its hard to describe, but general tasks beem quicker? Dont get me wrong, raw power of C2Ds absolutely trounce anything else (I do a lot of video encoding, and play a fair few games too), but in general windows operations and IE, i just think the P4s are better.

Or is this all in my mind?
 
Biglunn said:
Or is this all in my mind?
Click to expand...
No, I've found this as well.

When I open something like Documents which has loads of files in on my C2D machine, there is a definate stall for about 10 secs where the system is unresponsive before it catches up and allows you to use and view files.

That doesn't happen on my P4 rig, nor on my AMD64 rig either.
 
Digital Punk said:
No, I've found this as well.

When I open something like Documents which has loads of files in on my C2D machine, there is a definate stall for about 10 secs where the system is unresponsive before it catches up and allows you to use and view files.

That doesn't happen on my P4 rig, nor on my AMD64 rig either.
Click to expand...

Doesn't have to be the C2D per se.
I definitely agree and my AMD 6000+ rig is much snappier. I attribute this to the much better AMD memory controller. My C2D at it's current memory clock is almost as responsive too. I never owned a P4 so i can't say anything about that. Nehalem should fix this if it brings a memory controller that's as good as the AMD one.
 
Talrinys said:
Doesn't have to be the C2D per se.
I definitely agree and my AMD 6000+ rig is much snappier. I attribute this to the much better AMD memory controller. My C2D at it's current memory clock is almost as responsive too. I never owned a P4 so i can't say anything about that. Nehalem should fix this if it brings a memory controller that's as good as the AMD one.
Click to expand...

I can see that indeed it doesnt have to be the C2D chip itself, but more down to chipset/memory design. Either way, the C2D is part of the whole design. My fathers older AMD X2 3800 [my old PC] running slower DDR ram is snappier, and even my P4 based laptop is quicker in general work. My memory on my OC`d C2D system is running at 800mhz with tight timings. Could this be a legacy of the older P3-M design that the C2Ds are based on.

Wouldnt swap anything for my C2D setup (apart from a faster C2D or quad) because as I said, for processor hungry apps, it absolutely rocks.
 
Biglunn said:
I dont know if this is a result of HT, but have you people noticed that Pentium 4 based PCs are more responsive, snappier in Windows functions? Its hard to describe, but general tasks beem quicker? Dont get me wrong, raw power of C2Ds absolutely trounce anything else (I do a lot of video encoding, and play a fair few games too), but in general windows operations and IE, i just think the P4s are better.

Or is this all in my mind?
Click to expand...

havnt got/used a c2d pc yet but on the grounds that i hav a 3 ghz p4 with HT

I AGREE :D:D


lol
 
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