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Overclocking disaster (939 4400+ with asrock 939dual-vsta)

post #1 of 15
Thread Starter 
The problem

I've had an ASRock 939dual-VSTA and an AMD athlon xp 4400+ dual core for a few weeks now, running at stock speeds with some dual Kingston hyperx PC3200 2x1gb, and I've had no problems.

However, yesterday I received a new power supply (OCZ gamexstream 700w) and a new set of dual memory PC4000 (Mushkin redline xp DDR500 2x1gb) and the worst seems to have happened when I attempted to overclock my CPU at the memory's stock speeds (250x10 instead of 200x11).

When I put the memory in, it booted normally and it was running the CPU at 200fsb (multiplier 11) and the memory at 200mhz. All the timings were on Auto. Now, obviously I wanted to overclock, so I raised the fsb to 250 when lowering the multiplier to 10 to get 2.5ghz (I kept all the memory timings on Auto). I saved the new bios settings and it booted normally. I looked in cpu-z and had the 2.5ghz I was looking for. The memory (in cpu-z) was running at 250mhz as well and had the stock timings (3-3-2-8) (they were all on Auto in the bios).

From there everything seemed fine, but then I decided to go manually set the memory timings to those exact timings just for the sake of them not being on Auto. So I changed the timings to CAS-3 tRCD-3 tRP-2 tRAS-8 tRRD-2 and tRC-11, and I believe I had already set the vDIMM to Normal (2.7v ?) in the previous bios changes. Now for the exciting part, when I booted, it first showed the usually bios stuff, but then the screen just became black and seemed to have frozen there. So, I tried a simple reset and now it wouldn't even show the beginning bios display. When I turned off the computer and tried to turn it on, simply nothing happened, no power.


Specs:

Before:

Motherboard: ASRock 939dual-VSTA
Processor: AMD Athlon XP 4400+ Dual core 2.2ghz
Memory: Kingston HyperX PC3200 2x1gb 2-3-2-6 Dual channel (DDR400)
Power supply: Antec SmartPower 400w
Video card: ATI Radeon x850 Pro AGP 256mb
Hard drive: Western Digital 160gb (IDE)

Now (changes are in bold):

Motherboard: ASRock 939dual-VSTA
Processor: AMD Athlon XP 4400+ Dual core 2.2ghz
Memory: Mushkin Redline XP PC4000 2x1gb 3-3-2-8 Dual channel (DDR500)
Power supply: OCZ GameXStream 700w
Video card: ATI Radeon x850 Pro AGP 256mb
Hard drive: Western Digital 160gb (IDE)


My attempts to fix / investigation

I thought it was the power supply, so I just put in my old power supply, but the result was the same. I tried changing the new dual memory to my old dual memory, but again, no luck. I even tried each single memory individually, and in different slots, but it still did nothing.

So I cleared the CMOS and tried to boot the computer with the new power supply and the new memory, but still nothing happened. I noticed that when I activated the power (at the back of the power supply), it did as usual: all the fans (back fan, video card fan and cpu fan) worked for half a second, the power supply's light turned of for half a second and the case's visual temperature/lights showed up for half a second.

I verified that everything was plugged correctly, and it was. I tried to boot the computer with only a few components connected to the power supply: the motherboard, the cpu and its fan, the video card and the memory. However, the computer would still not boot up. When I plugged everything again, it still wouldn't show any sign of life, until, strangely, at very rare random moments it would allow me to boot. When I managed to boot I went directly to the bios and saw that everything was on default (after clearing the CMOS), so I kept everything on default and tried to boot, but it froze again after seeing the bios stuff. I did a reset and managed to get in the bios again. Here, it simply froze within the bios!

I turned off the computer and tried turning it on again, but then nothing happened, again it seemed like there was no power. Eventually, after turning on and off the power supply's power button at the back, I noticed that the fans and the lights didn't turn on for half a second anymore, even though the room's light still turned off for half a second (as usual). It seems like everything is dead as absolutely nothing happens.


Conclusion

I'm wondering what just died here. I'm pretty sure it's the motherboard or the cpu or maybe both? What could I have done wrong? The vcore remained at its stock value (1.4v which is also the maximum). The mushkin DDR 500 memory can run between 2.6v and 2.9v and it was set to 2.7v. I just don't get it.

Here's how I have set my BIOS for the most I can remember:

Overclock Mode: CPU, PCIE Sync.
CPU Frequency (MHz): 250
PCIE Frequency (MHz): 125
Boot Failure Guard: Enabled
Spread Spectrum: Disabled
Cool 'n' Quiet: Disabled

Multiplier/Voltage Change: Manual
Processor Multiplier: x10 2000 MHz
Processor Voltage: 1.4 V

Memory Clock: 200 MHz (DDR400)
Flexibility Option: Disabled
Bank Interleaving: Auto
Burst Length: 8 Beats
CAS Latency (CL): 3.0
TRCD: 3
TRAS: 8
TRP: 2
TRRD: 2
TRC: 11
MA Timing: 1T


Onboard LAN: Enabled
Onboard Sound: Enabled

AGP Aperture Size: 256mb
AGP Data Rate: 8x
AGP Fast Write: Enabled
Primary Graphics Adapter: AGP

CPU - NB Link Speed: 800mhz
CPU - NB Link Width: 16 bits
NB - SB Link Speed: 800mhz
NB - SB Link Width: 16 bits
DRAM Voltage: Normal


Any help/diagnostics/opinions on what happened would be really appreciated
post #2 of 15
Sounds like when my PSU stopped working.

Edit: The LED was lit on the motherboard, but the system still would not boot. I swapped PSUs and sure enough, she booted. So even though the LED on your motherboard is on, your PSU still might be the problem. Swap it and see what if she starts up. Also, do you know for sure your mobo can handle a FSB that high? I don't think you should have went straight from 200 to 250.
post #3 of 15
Thread Starter 
thanks for the reply

I had already tried to change the power supply* to my old one to see if it would boot, but still no luck. After reading your post, I tried again. I have put my 400w SmartPower in and tried to make it boot with everything plugged in. Surprisingly, enabling power at the back of the power supply made everything (fans and lights) turn on for half a second as usual. Unfortunately, it did not boot, same result. And I am using the SmartPower 400w on the computer I'm on right now.

It seems you are partly right though, as I have attempted to use the OCZ 700w on the computer I'm on right now and it did not work: no boot, no power. It seems to be broken now. Could it have broken my motherboard or CPU as well?

As for 250fsb, I have heard of many people overclocking using the same board and going past 250fsb, however, I do not know if they used a memory divider or if they went straight for 1:1 with DDR500 or if they just used DDR400 with 4/5.

Any other idea?

P.S. The Mushkin DDR500 ram seems to still be working fortunately, as I'm using it right now at 166mhz just to see if it works. So, right now it seems either the motherboard is broken or the cpu is. I'm not too sure how to know which one is without buying another cpu or getting a replacement for the motherboard. But if I do, I don't want the same thing to happen again...
post #4 of 15
I suppose a PSU could kill a board. I'm not sure if yours is dead or not, though. Take components onto another computer (graphics, CPU if possible, RAM) and see if those work. I think a computer should still boot with no CPU. I'm speculating, but could the mobo's battery be dead can cause this?

Well so far we know we have a dead PSU and something else dead in the computer. Any one, any other ideas what it could be?
post #5 of 15
Try a deep CMOS clearing.
Remove power to PS
Remove battewry
Toggle the on/off or the PS several times
Set jumper to clear. Wait several minutes.
It that don't do it repeat and wait overnight.
    
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post #6 of 15
Thread Starter 
I tried clearing the CMOS for 15 minutes and then booting with the Smartpower 400W power supply, activating/deactivating the power button at the back a few times, but unfortunately it did not work. I'm not too sure how to remove the battery as well...

I tried replacing the AMD 4400+ processor with a brand new AMD 4600+ with its stock CPU fan, but it did not boot either, so I guess it's definitely the motherboard.

The best option seems to RMA the broken power supply (received it last tuesday) and the broken motherboard as I have it since nearly only one month... With the new one, I will just use the 4600+ and run stock speeds with the DDR400 memory so I don't break it for obscure reasons again. Then I guess I should buy an extra (and better) socket 939 motherboard (plus a new case and a cheap PCIE card) so I can use the extra processor (4400+) and the extra memory (I already have a few hard drives) and overclock it properly.

I'm aiming for an ASUS or one of those DFI Lanparty one, I guess they are better for overclocking... right?
post #7 of 15
im assuming u tryed to reset the ram, boot with only one stick?

reseat the video card, if u got the room.. take the mobo out and see if there is any visible damage to it.. when it gets overvolted (killing type) it leaves marks on ICs when they explode.. also look carefully at all the caps.. see if they are leaking or expanded in any way..

my guess is that somehow it got a surge and blew something out.. or one or more of the mosfets went bad and the cpu or ram or something isnt getting any voltage so it doesnt start..

when u push the power button does anything happen or does the fans turn on?

might want to try for the sake of it the screwdriver start... just maybe the button was pushed one too many times.. (yes i have seen it.. took forever to find it out too)
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post #8 of 15
Thread Starter 
When pressing the power button, nothing happens, the fans don't even start and not even the leds turn on, yet the 400w power supply works fine on the other computer.

I have 2x1GB Kingston DDR400 and 2X1GB Mushkin Redline DDR500, I tried both sets in dual mode, then each single stick in all of the 4 slots, however still nothing. I cannot reseat the video card as it's AGP and I only one AGP slot.

The case is relatively new as well. I've had it for a few months and I doubt it's the problem, because I had managed to boot in the bios when all this problem started and it just froze there and then I couldn't boot at all after that. Everything is plugged in its place.

I will soon look at the motherboard itself to see if it has any apparent damage, though I'm not too sure what to look for.

P.S. Can DDR500 ram work at 250mhz on motherboards which specify they support up to DDR400 ? I haven't found any motherboard that specifies support for DDR500
post #9 of 15
have u tried starting the computer with a screw driver???
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post #10 of 15
Thread Starter 
How can I do that?
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