Help please -- DX975XBX2 not posting after bad overclock

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Entity

Lifer
Oct 11, 1999
10,090
0
0
After finally getting everything setup (Tuniq Tower, Asus P182, 4GB Corsair CAS4), I tried to change my memory timings to CAS4 default and to boost my o/c from 9x300 to 9x333. Computer restarts, and...nothing. Just blackness.

I've never gotten beep codes at all on this motherboard (no beep at all, actually), but it does have a system speaker, so I'm not sure what to do at this point. I've tried moving the jumper on the BIOS reset from 2-3 to 1-2, but I'm sure I'm screwing something up as it doesn't change anything.

Anyone have links to a step-by-step process for recovering from failed o/c on one of these boards?

Rob
 
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Entity

Lifer
Oct 11, 1999
10,090
0
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Just to make sure the internal speaker was working (and I wasn't missing any beep codes), I just removed all the ram, and it beeped at me. :p

So now all I can figure out is that it's just not posting, and I can't figure out why. I think if I actually understood how to reset the jumper on this properly it probably wouldn't be an issue, but I'm feeling a bit out of my field here, as it doesn't seem to work like a standard CMOS jumper used to.

Rob
 
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Entity

Lifer
Oct 11, 1999
10,090
0
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I'm trying the method described to boot from the recovery BIOS disk right now, and still am just getting the black screen and nothing else (no beeps, no display -- nothing). This is on two separate video cards, both on different PCIe slots.

This is unbelievably frustrating. I have no clue what the error could be or what the hell is going on since I can get no feedback from my rig.

Rob
 
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Entity

Lifer
Oct 11, 1999
10,090
0
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After trying the same thing what felt like dozens of times, I've got the machine back up and running again at default settings.

Going to try to overclock again but I'm going to check a bunch of stuff first before I get in too far over my head.

Rob
 
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Bozo Galora

Diamond Member
Oct 28, 1999
7,271
0
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Set rocker swith on PSU (if it has one) to "0", Unplug the PSU from wall, short the 1-2 cmos pins (pin 3 doesnt go anywhere) with the jumper and leave it there, pull battery and wait an hour. Put battery back in, unshort the pins, plug in PSU, put rocker on "1" (Note that plugged in PSU's that are "off" still have trickle voltage)

Get a PCI vid card from somewhere, pull your PCIe card, and put it in. Buy one stick of cheap high latency (crummy) RAM (Like 512MB corsair value ram) that ris specced to run at STOCK VOLTAGE (1.8), pull your RAM and put in cheap stick. If it boots, immediately go in bios and set failsafe defaults and boot to XP.

If that doesnt work, do it again, but wait 24 hours. I know it sounds crazy, but sometimes 24 works when 1 doesnt.
 
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herbiehancock

Senior member
May 11, 2006
789
0
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Originally posted by: Bozo Galora
Set rocker swith on PSU (if it has one) to "0", Unplug the PSU from wall, short the 1-2 cmos pins (pin 3 doesnt go anywhere) with the jumper and leave it there, pull battery and wait an hour. Put battery back in, unshort the pins, plug in PSU, put rocker on "1" (Note that plugged in PSU's that are "off" still have trickle voltage)

Get a PCI vid card from somewhere, pull your PCIe card, and put it in. Buy one stick of cheap high latency (crummy) RAM (Like 512MB corsair value ram) that ris specced to run at STOCK VOLTAGE (1.8), pull your RAM and put in cheap stick. If it boots, immediately go in bios and set failsafe defaults and boot to XP.

If that doesnt work, do it again, but wait 24 hours. I know it sounds crazy, but sometimes 24 works when 1 doesnt.
Click to expand...



Do you even know what the motherboard looks like and how it works?

The CMOS jumper, or BIOS jumper, is ALWAYS jumpered across 1-2. That is its NORMAL setting, so "shorting" 1-2 pins is doing absolutely NOTHING.....it's always set that way.

Shorting the CMOS pins to 2-3 actually does do something....it enables the maintenance menu to be accessed in the BIOS. Pin 3 does indeed go somewhere......unlike what you've mentioned. Removing the jumper completely from the pins actually gives you what you are looking for in your misguided statements above.

But, after a bad OC in the BX2, moving the jumper to the 2-3 setting always has enabled the board to boot to the maintenance menu in the BIOS with essentially default settings.....never have had an issue with it refusing to boot set like that.

Maybe you're confusing the BX with the BX2 boards. The BX2 uses both settings on the pins for different uses.



PS.....many, many power supplies, when turned off on the rear, do NOT trickle power to the board.....this has been established by using a multimeter on the ATX power connectors and comparing the on vs. the off setting on the ps.

But, removing the plug from the back of the power supply, a much easier done thing than trying to unplug from the wall and accomplishes the exact same thing, is always recommended. I also, after unplugging the power cord from the power supply, hit the power button on the case to discharge any saved elec. in the ps's capacitors. Works every time.
 
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Shimmishim

Elite Member
Feb 19, 2001
7,504
0
76
yes, the bx2 is not like your typical board. there is no clear cmos switch/jumper, only a maintenance mode jumper which is similar to clear cmos but much nicer since it doesn't clear out all your settings.
 
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Mucker

Platinum Member
Apr 28, 2001
2,833
0
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I've thrown the jumper on the BX2 more than any mb I've ever owned (to the point where I am sick of it). It seems the 2333 bios is more forgiving when it comes to booting. The later bioses seem to produce alot of cold boots when making changes. At least it has booted every time in maintenance mode.

I am receiving a DFI 965-S today, hopefully the jumper parade is going to end.......
 
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Shimmishim

Elite Member
Feb 19, 2001
7,504
0
76
really? i think i've had to go into jumper mode about 3 times since I got this board back in February.

that DFI board is gonna be sweet. :)
 
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Bozo Galora

Diamond Member
Oct 28, 1999
7,271
0
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yeah, I was recalling the jumper settings from memory - my bad. It was backwards.
I've been using the DS3 in all versions for 6 months and it has no jumper - only two pins and the MSI Neo 4 I just built for my younger daughter has a push button. DOH!

And I meant PSU's that are "off" still have trickle voltage I meant not on by the power button. Putting rocker button on "0" does stop all voltage.

I really dont post on AT anymore because my mind is on other things (obviously), but I do keep my eye on mobo forum and the hot deals forum. Thusly I got the hot tip on where to get a DFI P965.
 
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herbiehancock

Senior member
May 11, 2006
789
0
0
Originally posted by: Mucker
I've thrown the jumper on the BX2 more than any mb I've ever owned (to the point where I am sick of it). It seems the 2333 bios is more forgiving when it comes to booting. The later bioses seem to produce alot of cold boots when making changes. At least it has booted every time in maintenance mode.

I am receiving a DFI 965-S today, hopefully the jumper parade is going to end.......
Click to expand...

I've seen some people who are in for the long term with the BX2 actually fashion a switch connected to the 3-pin jumper and mount the switch externally.

The switch is an on-off-on three-way......up is on, center is off, down is on....and it's wired using old castoff three wire power switch wiring. Pins 1-2 are wired in the up position on the switch for normal function. Pins 2-3 are wired in the down position for maintenance access. Center is off....no wiring....clear CMOS.

So, while OC'ing may produce a need to jumper move to get it back to working...the person simply throws the switch from up to down and boots. Never has to open the case at all.


Link to pic of switch and wiring.


A huge thread on XtremeSystems.org about the BX2.....55 pages and counting!!!
 
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Mucker

Platinum Member
Apr 28, 2001
2,833
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0
Yes, I know about the switch (and thanks for sharing the info), just tired of the numerous cold boots from a very sensitive mb....

My DFI arrived, will build tomorrow...
 
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Entity

Lifer
Oct 11, 1999
10,090
0
0
Heh. Last night I read the entire thread (or most of it) at Extremesystems and began to understand a lot about this board and setup.

As of today I've got it going @ 360FSB, running Orthos right now, with the cores @ ~44C and the CPU @ 52C under full load. I'm thinking about kicking it up one more notch but I'd be hard-pressed to really complain about the performance at any point, and I'm not a huge overclocker to begin with, so I may just leave it here. I've probably even stepped up some of the voltages (MCH etc) higher than I need to so I may gradually try to kick those down to see where the right point for stability/heat is.

Rob
 
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Mucker

Platinum Member
Apr 28, 2001
2,833
0
0
Try (if you already have not) booting into maintenance mode and selecting "load optimal defaults" from the Exit menu. Save, shutdown, and set the jumper back to normal, reboot and enter the bios, re-enter your settings working upwards in increments
 
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craftech

Senior member
Nov 26, 2000
779
4
81
Is there a reason not to run a board at stock for awhile before you overclock just to establish that the board is functioning properly and will continue to run stable THEN slowly mess with it once you are sure there is nothing wrong with it?

Or am I old fashioned?

John
 
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Mucker

Platinum Member
Apr 28, 2001
2,833
0
0
Originally posted by: craftech
Is there a reason not to run a board at stock for awhile before you overclock just to establish that the board is functioning properly and will continue to run stable THEN slowly mess with it once you are sure there is nothing wrong with it?

Or am I old fashioned?

John
Click to expand...

We want it fast and we want it now, dammit! :p
 
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