In terms of memory driving capabilities at stock speeds, the Intel
board will likely be less cranky. Specifically, driving four sticks
of memory on the Intel will cause fewer headaches than on the Athlon64.
(The Intel side, relies on the Northbridge on the motherboard to
drive memory. The Athlon64 processor drives the memory itself.)
There are plenty of benchmarks around the net. This one is not
as complete as it could be (I don't see Venice here - Venice has
SSE3 support), but it is very easy to use. Try the different tasks,
from the right hand menu. For some things the Athlon64 will be
faster, and depending on the application, the Intel might win
(it depends on how an application is coded, and whether the
extensions the Athlon64 offers, are used by the software).
More recent benchmarks on the web, are showing more wins for
the Athlon64, but you should keep an open mind about this,
and find benchmarks representative of the applications that
you use. (A fanboi site will only use apps where the Athlon64
is a big winner.)
http://www23.tomshardware.com/index.html?modelx=33&model1=14&model2=62&chart=21
To put it another way, I own the P4C800E, and if I was
purchasing now, would buy the Athlon64 plus 2x1GB of memory.
(The 1GB sticks might be cheaper after New Years day.) I
would buy memory with the 64Mx8 chips on it, and not the
super-cheap memory. By buying two sticks, I would be hoping to
avoid problems that might happen with four sticks (if you
consider running command rate 2T to be a problem or not).
A purchase of 2x512MB will be even less hassle, as there is only
one practical way to make the 512MB DDR modules, and so you won't
have to guess at whether the module uses "nice" chips or not.
To consider pathological cases, the Athlon64 runs at 2.2GHz. The
P4 in your example at 3.0GHz. Someone here had a scientific application,
and found the Athlon64 behaved more like its 2.2Ghz clock
speed, than its "AMD 3500+ P.R." rating. If a particular piece
of code does things that don't agree with the Athlon64, then it
becomes slower than the P4. If you are a gamer, there is no
contest, and for games the Athlon64 will blow the doors off the
P4. All I can honestly say, is if your main purpose is gaming,
the Athlon64 is the way to go. For any other usage, you had
better find more benchmarks on the web, to help you make a
decision.
HTH,
Paul