A few questions...

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My last computer was built 6 monthes ago and everything has changed since
then. I am buying an Athlon 64 3500+ chip and I have to run an AGP 8X Mobo
because i work with CAD and it requires a very special and expensive video
card that I had just bought. The recommended MOBO for this application (from
AMD) is Epox  9NDA3+ and I have no problems with Epox at all. In fact I have
5 machines setup at this time and all run Epox Mobo so I will be quite happy
I am sure. I am not interested in overclocking. I just need a reliable
computer that can crunch numbers very quickly and do fast rendering of solid
models for design work. Anyways...Im getting all confused over this 20 pin
vs. 24 pin PS in the cases. I want to buy an Antec (again another brand Im
very familiar with) and it says it is  "whatever" compatible for the new 24
pin. Is this going to be backwards compatible also if the board is 20 pin.
Im at a loss and can find absolutely no information at either Antec or Epox
on these compatibility issues. Do I have to buy some type of adapter cable
if the PS is 24 pin and the mobo is 20. Im at a loss. Also one more
question. I cannot find anyplace the maxium HD capacity thisMOBO will
handle. I want to run (2) SATA 160 GB and a standard ATA 160 GB. will the
Mobo support drives that big. Again I have searched all the manufacturers
sites, google, and everyplace else I can think of. Can someone dig my out
from underneath the pile of comfusion. Thanks for yout time. Sincerely, Jake

Re: A few questions...


I'm not sure why you've posted this in an overclocking newsgroup, but...

If you're getting a 3500+, it would be best to get a "Venice" CPU (90 nm)
rather than the older "Newcastle" (130 nm) one. I'm satisfied with my
Newcastle CPU, but I've had it for nearly a year. The 90 nm chips use less
power, and probably run cooler. (The price difference is small.) There are
also 90 nm "Winchester" CPUs, but the "Venice" ones are the latest.

I believe that it's possible to plug a 20 pin ATX power connector into a 24
pin mainboard ATX 2.0 socket, but as far as I know, you can't plug a 24 pin
cable into a 20 pin socket. I'm using a Tagan power supply with a 24 pin
cable. It came with an adapter cable, which is a little bulky but simple to
use. Antec uses a tidier scheme on some of their supplies: the extra 4 pins
are on a block that can be separated from the other 20, so that the
connector natively fits both 20 and 24 pin sockets. Antec has manuals
available for download (www.antec.com). You'll probably have to look at a
specific model's manual to see whether it supports the feature. (The
Smartpower 2 series appears to have it.)

I believe that any of the Socket 939 mainboards will support LBA48
addressing. That supports drives much larger than any currently made. If you
plan to run Windows, you'll need XP SP1 or later, or Windows 2000 SP3 or

Other suggestions:

If you want to become even more confused, see other mainboards are available
that do what you want. (Try www.newegg.com. In the AMD compatible mainboard
section, choose Socket 939 and AGP 4x/8x. A board that comes up is the Asus
A8V Deluxe, which is the one I'm using. It uses the Via K8T800 Pro chipset,
rather than the nVidia nForce 3 Ultra chipset in the Epox board. The NF3
Ultra is supposed to offer the best performance, although I've been happy
with the VIA board.)

If your CAD applications run multithreaded, you may wish to consider a dual
core Athlon64 CPU. (At Newegg, search under the Manchester and Toledo
cores.) You'll be out a few more hundred dollars, but a dual core CPU may
significantly improve the performance of some applications. If you decide
that it's worthwhile, check whether the mainboard's manufacturer has
released a BIOS update that supports dual core. (It appears that Epox has
yet to release one for the 9NDA3+, although I presume that they will.)


Bob Knowlden

Address may be scrambled. Replace nkbob with bobkn.

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Re: A few questions...

The powercable adapter comes with most new quality psu's that have the 24pin
power plug.
And you should also be able to buy one,they should not cost much i pressume.
But my guess is antec will deliver it in the box,my coolermaster has it
Anyway,the 4 extra pins are not really required,mainly for the onboard
sound,so a 20 pin connector would fire up your board also,ofcourse you do
need the extra 4pin power plug for cpu voltage that is most common in modern
mainboards nowadays.
But most if not all powersupplies have this extra plug.
It would be very poor from antec if they did not deliver this powerplug
adaptor with the psu. ;)

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