Help with dual channel problem pls.

October 16, 2010 at 16:19:35
Specs: Windows Vista 64-bit, 2.4 quad core/4 gigs xms2 corsair
Here is a tough one for you. My memory gives no errors when checked with memtest and the windows memory diagnostic utility, and it works fine in single channel configuration. However, if I switch to dual channel configuration the memory will cause random lock ups during operation. There is no BSoD, but it is a definite forced hard shutdown. I am running 64-bit windows vista with 4 gigs of ram (all the same make and model for the ram, dual channel kits XMS2 Corsair 1Gig). I've had the system for a long time, and I don't really want to update the bios. However, is this most likely the source of the problem and the fix? Manufacture's website lists for p5n-e sli a bios update which expands memory compatibility in some respects, but does not list specifically what it expands.

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October 16, 2010 at 16:44:34
I'm not usually one to recommend a bios flash but in your case it seems warranted.
I would recommend the flash be performed with only one stick of ram.

Goin' Fishin' (Some day)

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October 16, 2010 at 20:04:13
I am running 64-bit windows vista

Have you tried loading up Windows XP 32bit without any problems? Vista sucks! If you are going to use Vista and not windows 7, or XP, then always have your system in a dual boot configuration with XP + Vista.

In short, if it works with XP without issues, and you have all the drivers installed correctly in Vista and it still crashes, switch to XP or 7, thats the best advise I can give when it comes to Vista.

However, if you can't get the machine to function properly in XP either, then something is obviously wrong and can be looked into further from that point on.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI

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October 17, 2010 at 04:35:57
I have tried it in 32-bit Vista, and most unfortunately there is no difference. I have not used it on windows XP 32 or 64 - I do own this OS, but I really am not likely to go back to it at this point even for a diagnostic. Particularly since drivers for the motherboard are usually specific to how windows communicates with each component, and the only drivers possibly associated with this would be the PCI standard RAM controller which is up to date. This sort of error, as far as I understand it, would typically throw a stop error, BSoD, and would be documented within the event viewer, so I'm not inclined to believe it can be associated with a driver issue. I have not tested this, but I am fairly certain it would freeze outside of the windows OS given enough time. All my hardware is also certified for windows vista, so the only thing I've really been able to think of is the possibility of it being bios related. Here is some other stuff I have tried. I have tried rearranging the memory, and that also leads to the same type of error. There are several things I could try before flashing, but my knowledge base does not really provide me with a definitive answer in this respect. I could try taking out all the ram but 1 stick, and then resetting the bios to defaults. Then turning off the computer and putting in another after letting it run for an hour (adding the other in dual channel specifically). Then I can try putting the memory in single channel configuration and test again. Then I can test the alternate set in the same manner, and lastly I can put them all back in and reset the bios again along with a power down reset (power cord pulled out and let sit out for approx 2 min). I will attempt this, and I will report the findings. However, it really seems like something is going on with the motherboard interaction with the memory and not windows personal direction of the issue. I will give you this though... vista does most definitely suck. I can still remember when windows 2000 came out, and I thought this company had a future. Then windows xp came out, and it was basically 2000 with a GUI upgrade. I thought it was cool, but was impressed with the professional additions. Then good ol'vista comes out, and pretty much everything has to be certified for it or you will get a headache.

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