On Mon, 21 Apr 2008 01:59:34 -0700 (PDT),
abcdefgh@coder.hu
wrote:
>On Apr 21, 9:34*am, Darklight <nglenng...@netscape.net> wrote:
>> abcde...@coder.hu wrote:
>> > Hello!
>>
>> > Here is two CPUs:
>>
>> > Core 2 Duo E4700 (2.6GHz, *800 FSB, * L2: 2MB)
>> > Core 2 Duo E6700 (2.66GHz,1066 FSB, L2: 4MB)
>>
>> > The biggest differences about the processors: the FSB.
False, the 2nd has double the L2 cache which is about 5-15%
performance difference on average, depending on the
application. In other words, the 2nd CPU is faster than the
first, and priced accordingly. You are making a simple
choice difficult, the choice being whether you are willing
to pay more for more performance (same choice as always,
with every year and every family of CPU).
>> >Let's fancy
>> > another two processors:
>>
>> > A: Core 2 Duo (2.6GHz, *800 FSB, * L2: 2MB)
>> > B: Core 2 Duo (2.6GHz, *1066 FSB, *L2: 2MB)
>>
>> > Can I feel different performance if I don't change anithing in the
>> > computer except the CPUs (A -> B)? Of course, the motherboard support
>> > both type of CPU.
No you won't feel, or perceive the difference, but the same
is true for each minor difference in performance in memory
or video, HDD, etc. In other words if you add up several
parts in a PC, each of which is barely enough of a
performance increase to notice, the end sum of all
improvements IS enough to notice.
Pick the fastest FSB and largest L2 cache the budget will
reasonably allow, unless you plan on overclocking. If you
plan on overclocking, getting a processor with lower default
FSB (if all else were equal) would allow raising FSB more
for higher O'C before you hit a FSB limit.
>>
>> > Does FSB speed matter?
Of course it does, why else do you think they would be using
faster FSB than previously?
>>
>> > Thank You!
>>
>> question is do you need the extra speed and are you willing to pay extra to
>> upgrade the ram
>
>Thanks Mike!
>
>The RAM in the machine is fast as possible but the CPU is not.
As fast as possible is not a specific. You want a specific
answer to a specific question you have not asked, and you
have not provided the specifics of the other parts nor the
tasks you run.
>
>I want
>to replace the Pentium D
You are not being specific about what Pentium D you have,
nor what your motherboard's max FSB is which may be lower
than 1066 if the motherboard is very old.
> but I didn't know, witch one is the better
>choice.
>
>Darklight,
>I've got 4 GB RAM but the CPU is "not the best".
Neither of the CPUs listed is "the best" either, so
ultimately you have not supplied the relevant information
for us to help you make any meaningful choice.
It would be more helpful to you if you listed the following:
- Current motherboard make and model
- Number of memory modules, total capacity (listed again
in concise form), spec'd speed
- Desired CPU price, budget range
- Applications in which you need the performance boost
most.
Some old Pentium D boards don't even use DDR2 memory, having
the fastest DDR(1) memory like PC3200, makes it fairly
irrelevant if your board has the fastest memory it can
support as it would still bottleneck the CPU. Also we don't
know but assume you do, whether your board supports the
above listed processors.
A generic answer is as written above, pick larger L2 cache
and faster FSB for more performance if the mobo supports
that FSB, unless you are overclocking in which case you want
lower FSB than the max your board supports so you have some
room to increase FSB (since multiplier cannot be raised).
Does FSB speed matter? 
Linear Mode
