Some questions about 64-bit CPUs

R

Random Person

Hi guys. The AMD64 CPU I have I use solely for tailor-made 64 bit
(work) applications. I am unsure how useful a 64 bit CPU is as a home
computer for general purpose use, considering most apps in the market
are written for 32 bit CPUs.

What proportion of retail software is 64 bit, vs. 32 bit?

What benefits are there of using a 64 bit CPU on a 32 bit application?
Are these benefits significant?

Do you have any links to articles related to what I've talked about?
(I've done some reading, IIRC the benefits are only related to an
improved memory controller)

BTW, would you agree that the most cost effective CPU at the moment is
a highly overclocked Duron 1600?

Any other insights welcome.
 
J

John

On 2 Nov 2005 07:26:00 -0800, "Random Person"

Ive seen some articles in the past where they claim a boost from 64
bits but I dont know any 64 bit apps frankly for home use. Maybe there
are some but I havent heard of any. Also as everyone keeps complaining
about they cant find drivers for many of their peripherals like
printers etc for the 64 bit win OS.

The main reason people are buying 64 bit CPUs is , its the current gen
of CPUs and there are overall design improvements with the new gen
CPUs , well at least AMDs that make it a better CPU rather than the 64
bit feature at the moment.

Right now the dual core feature seems like it might be more of a
benefit for some users and the prices are really coming down. Someone
just posted a $299 price for the AMD X2 3800 recently. Just a few
months ago when it came out it was around 380 I think then 350 and
there was a current price cut on the CPUs so who knows maybe low 300s
maybe the new price when things settle down. Im looking for 249 for X2
3800 AMDs lowest cost dual core.

And its not just the features of the CPU itself. Its the fact the
interface - socket 939 for the AMDs and the 775 for Intels etc now are
used for newer chipsets which use PCI express sockets. Also if you are
talking about the older but still newer than socket A and really old
INTEL sockets ---- the newer motherboards use SATA HD connections etc.
None of these by themselves offer any big performance advantages but
some HD options like the Raptors need SATA though you could add a
controller I suppose. Also AGP will probably fall in popularity maybe
next year or so.
BTW, would you agree that the most cost effective CPU at the moment is
a highly overclocked Duron 1600?

I cant even remember Duron specs but most people moved on to the
Bartons duing the era of Athlon 32 bit XPs. Those are still quite
decent though Xbit labs says they stopped making socket A chips a
month or two ago and the supply seems like its drying up but Im not
100 per cent sure all thats true. Even the 754 ---some types seem to
be drying up a little. Last time I looked I still saw some OEM
versions of the mobile 512 cache XP athlons 32 bit 2400 and higher.
The Bartons were super popular as were te mobile versions cause they
almost were guaranteed to easily hit 3200 if you merely set the FSB to
200 and were as low as 70-80 bucks for a retail version but after that
they actually started going up in price as they started phasing them
out.

And nowadays ---- theres the 3100 sempron 64 bits that are said to OC
a lot and the 939 socket AMDs are said to OC very well and the prices
of 939 stuff as well as 754 sockets if you buy a refurb or one of the
cheaper boards and a sempron can really be low. Sometimes it can rival
or even beat a socket A price if you find the right sale. Example -
for me this is a once a lifetime probably deal for me especially
considering where I live but I got a Compaq 754 socket , 3200 AMD 64
with 40 gig sata drive and CDRW , 6in 1 reader with built in graphics
for $109.

If I wanted a super low cost system now --- I would try to find a
killer deal on a 754 socket AMD and look up some articles on OCing
capability of various low end 754 semprons like the 3100 vs the cost
of a 939 low end board with hopefully a new sempron 3100 for the 939
socket if it ever comes out. And compare both to the cost of a socket
A with a 2400 mobile or some other easily OCed barton/512 cache socket
A. I wouldnt get the socket A unless it was substantially cheaper
than the other alternatives and I wouldnt get a 754 unless it was
substantially cheaper than a socket 939.
 
K

kony

Hi guys. The AMD64 CPU I have I use solely for tailor-made 64 bit
(work) applications. I am unsure how useful a 64 bit CPU is as a home
computer for general purpose use, considering most apps in the market
are written for 32 bit CPUs.

What proportion of retail software is 64 bit, vs. 32 bit?

What benefits are there of using a 64 bit CPU on a 32 bit application?
Are these benefits significant?

Forget that it can do 64bit and just remember that it is
still the fastest CPU for 32bit. Not "all" features of a
CPU have to be exploited, for the CPU to be good at any
particularly thing it does support.

Do you have any links to articles related to what I've talked about?
(I've done some reading, IIRC the benefits are only related to an
improved memory controller)

No need for articles, you arbitrarily assumed a problem that
doesn't exist.

BTW, would you agree that the most cost effective CPU at the moment is
a highly overclocked Duron 1600?

Depends on the need. If all one needs is any-random-CPU to
run a system, with no concern for performance levels, then
yes, a low-end Duron or Celeron or some past-generation CPU
would be the most cost effective.

If the need is performance, no, the cost of the CPU is only
a percentage of the total system cost and in that context
you will have more performance per $ going with higher model
CPU.
 
D

DaveW

Virtually NO consumer software is 64 bit at this time; it is still all 32
bit. 64 bit processing is more efficient for large computing loads in that
it can address MUCH larger groups of memory simultaneously than 32 bit.
Essentially no consumer software currently would benefit much from 64 bit
processing yet.
 
B

Boba & Ilinka

I just bought 820. Reson is that it should be inough good for next 5 to 7
years. After 2 to 3 years I will buy a new one and the older one (P4 1.7)
will be retired. The old one PIII 500 didn't cope any more with anti virus
and was to slow.

Boba Vancouver BC
 
R

Random Person

Thanks for your informative replies everyone!
Virtually NO consumer software is 64 bit at this time; it is still all 32
bit.
Essentially no consumer software currently would benefit much from 64 bit
processing yet.




That was what I was thinking. Without much 64-bit code, when people say
"buy a 939-pin 64 bit CPU to future proof yourself", surely then the
best way to future proof yourself is to keep the money in the bank
until 64-bit software becomes more common? ;-)

I guess I'm still grudgingly happy with my 32-bit XP 2500+. When 64-bit
software becomes the norm for the price of a 64-bit 3500+ today I could
probably get a 64-bit 7000+ :)
 
J

John

That was what I was thinking. Without much 64-bit code, when people say
"buy a 939-pin 64 bit CPU to future proof yourself", surely then the
best way to future proof yourself is to keep the money in the bank
until 64-bit software becomes more common? ;-)

Well like everyone pointed out its not primarily the 64 bit aspect its
the fact that its a better processor overall and the fact it goes with
the new motherboard chipsets that also have new features and the MB
socket can take dual cores in the case of most nforce4 boards if you
want to upgrade later to a dual core.

The 64 bit aspect is just possible icing on the cake if it ever does
take off. In the case of semprons primairily --- might as well get a
64 bit since they have been phasing them in - 64 bit semprons just in
case.
I guess I'm still grudgingly happy with my 32-bit XP 2500+. When 64-bit
software becomes the norm for the price of a 64-bit 3500+ today I could
probably get a 64-bit 7000+ :)

If you dont have money to burn and you are happy with your system then
might as well save your money. They already are talking about M2s for
AMD and the next gen INTEL chips. If the M2s do come out and use DDR2
then everyone who wants to upgrade will have to get a new motherboard,
CPU and memory if you had an AMD system ! So it will be a big hit.
The longer you wait obviously the more chance you can just skip over
one gen of an upgrade and go directly to the next. That would really
be a killer if they tried to finally sneak in BTX so that you have to
throwaway your case too.
 

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