Re: AMD vs Intel - Ghz & performance question

David Kanter wrote:
> > You may quibble if you wish.
>
> Why thank you for that privilege.

And let's not be unsure about what we meant by the term:
http://tinyurl.com/7fqcf

> Part of it was competition, but another part was simply pragmatism.
> Nobody doubts that 65W CPUs are easier and cheaper to deal with than
> 130W ones...

If it weren't for trying to stay ahead of the competition, Intel
wouldn't have even been trying to flirt with 4 Ghz so quickly. We'd
likely be around the 2.5 Ghz mark right now with the P4, and plenty of
Watts to go before heat became a problem.

> Sorry I meant the memory controller...brain malfunction there.

Okay.

> > However, there are some well-known areas where HT has helped even in
> > single processor systems. That would be the situation when you're using
> > Nvidia's SLI dual-graphics. It's been shown that you gain more
> > performance when going to SLI with AMD systems. I believe the percentage
> > increases are between 20-40% in Intel systems, whereas it's between
> > 60-70% in AMD systems, comparing Nvidia's own Nforce chipsets against
> > each other.
>
> That's not due to HT. That performance gap is largely due to the fact
> that NVIDIA only recently started making Intel chipsets, while they've
> been doing AMD chipsets for around 5 years. You'll never be able to
> figure out how much of a benefit you get from HT on it's own. At least
> with a memory controller, you have a chance, since you can guess the
> latency without the controller.

It's been at least a year since it's announcement:

http://www.nvidia.com/object/IO_17070.html

Since that time, there's been one major upgrade (AMD side was still
using Nforce 3, while Intel version got released as Nforce 4; AMD side
didn't get Nforce 4 till a bit later), and probably countless stepping
upgrades on both sides. Nvidia had also started doing AMD chipsets when
AMD was still using its own FSB. And let's not forget that Nforce was
derived from the Xbox, which used a Pentium 3. So it's not like as if
Nvidia didn't know how to handle a FSB. Still the gap exists between
the implementations of SLI on AMD vs. Intel platforms.

You could say that Nvidia is partisan to AMD. That can only be prooved
if Intel came out with a competing SLI chipset. But so far there's no
Intel chipset capable of SLI yet, despite the fact that Intel and
Nvidia swapped patents in that announcement above. So one should think
that an Intel SLI chipset should've emerged by now. I can only guess
the reason there isn't one now is because Intel can't get any better
performance out of their chipset's SLI than Nvidia can.

Yousuf Khan

.

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