Re: A7N8X Lockups
- From: "old_Boat" <OldBoat@xxxxxxxxxxx>
- Date: Sun, 26 Feb 2006 17:53:42 GMT
"Paul" <nospam@xxxxxxxxxx> wrote in message
news:nospam-2602061032590001@xxxxxxxxxxxxxxxx
In article <oqbMf.130553$Q11.98213@xxxxxxxxxxxxxxxxxxxxxx>, "old_Boat"Thanks Paul, I will check that out. So far it has run the memtest
<OldBoat@xxxxxxxxxxx> wrote:
I have an A7n8X with a 2500 Barton processor. What would the proper
settings
for this chip be as for FSB, multiplier, Voltages etc. This is the
axda2500kv4d. I am experiencing frequent lockups with this combination
unless I run it so that the board thinks it is an xp 1900. memory is 2
sticks of 512 mb pc3200 400 mhz.
Thanks,
LJ
A 2500+ is 166MHz x 11 multiplier. The multiplier should be
locked, so it cannot be changed from 11. You can adjust the
clock to the CPU to 166MHz. The memory clock should be able
to work at 100%, which makes the memory clock also 166MHz or
DDR333 transfer rate.
If you attempt to overclock the processor, by running it
at 200Mhz, the memory will likely not be stable. You can
try a memory setting of 83% if that happens, and see if it
is any better. (The 83% setting makes the memory clock 166Mhz
when the processor is 200Mhz. So the memory is running at
DDR333. The reason for this, is the Northbridge is sensitive
to the kind of memory used.)
Always use memtest86+ from memtest.org to test the memory.
This is not a complete test of the memory, but avoids
the possibility of you corrupting Windows by booting with
unstable memory. Running Prime95 (mersenne.org) torture
test option, from Windows or Linux, will complete the
testing. Memtest86+ should run error free for a couple
complete passes, and Prime95 should run error free also,
before the computer is ready for regular work. If it
doesn't, find out why.
Some info here:
http://www.senorpanadero.net/alpha_03/A7N8XFrames.htm
There are also hacked Asus flash files, that have
Command Rate set to 2T. Command Rate is not changable
as a separate line in the BIOS, but is established by
burning the modded flash file. Normal Asus Command Rate
is 1T, and by using a 2T BIOS (also known as a "CPC Off"
BIOS), it is possible to get more from the memory
controller than you can get with a normal BIOS. Running
at Command Rate 2T reduces memory bandwidth, and running
at 2T allows the memory clock to be increased by about 30MHz.
Thus, a system that used to do 166MHz clock for memory, can
be run at 200MHz clock for memory, and the memory bandwidth
changes (loss due to command rate, gain due to increased
memory clock) just about balance. It would allow a 2500+
to be run 200x11, making it run like a 3200+, and allow a
dual channel memory which is normally only stable at 166,
to run at 200Mhz also. It allows the memory controller
to be run at 100% (synchronous). A CPC off BIOS is more useful
for a person trying to achieve >200Mhz CPU/memory clock, but
may also help a person whose DDR memory isn't that good.
You have to be extremely careful with version control when
using hacked BIOS, and that is why I am not providing a pointer
to one. I'm not sure which motherboard and motherboard revision
you are using, and it is too time consuming to try to search
for all the hacked BIOS out there. Places to start looking
would be forums.pcper.com/search.php and
www.nforcershq.com/forum/search.php . Good keywords would
be "CPC" or "2T" or "trats" (the author of one series of
modded BIOS). I use a "CPC on" Trats BIOS on my A7N8X-E Deluxe,
for no particularly good reason :-) (I was experimenting at
the time...) I had a lot of trouble with memory too.
flawlessly. It also has run the prime 95 torture test for an hour with no
problems. It did lock up once during the torture test but I was doing all
kinds of other stuff at the same time trying to stress it out. The problem
seemed to be the video card. I changed it from an asus V7700n deluxe agp
card, to an old out of the junk box Diamond stealth 2000 and now it seems to
be working. Go figure. This may have been my problem all along. Also asus
probe is reporting my 5 volts to be anywhere from 4.5 to 5. This is with an
antec 550 trueline powersupply.
LJ
.
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