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laserkitty
02-28-06, 11:57 AM
My ram, GeIL PC3200 1GB kit (2x512), failed memtest quickfastinahurry when I had both sticks in, but when I have only one or the other stick in, they run indefinitely without error.

Is that normal? Could there be a problem with the RAM that only manifests in dual channel?
KillrBuckeye
02-28-06, 12:09 PM
Yes, it is very possible that one stick is faulty but the problem only shows up when running in dual channel. I suggest that you boot to Windows using 1 stick at a time and run Prime95 for 12+ hours to see if you get any errors. This was the only way that i was able to determine that one of my Ballistix modules was faulty. Memtest86 could run forever on either module without errors, but Prime95 found errors after 1.5-2 hours when running with 1 of the modules.
laserkitty
02-28-06, 04:10 PM
Will do. Thanks!
_damien_
02-28-06, 04:22 PM
Socket 939 rigs will usually run two doublesided sticks without issues, however there are exceptions. I think this is related to the controller's load rather than faulty memory sticks. More banks to address mean higher impedance and lower slew rate. Setting the command rate/command per clock to 2T could solve the problem.
laserkitty
02-28-06, 07:00 PM
I'm in 2T already.
OnDborder
03-01-06, 11:51 AM
Which set of Geil and at what settings?
laserkitty
03-01-06, 07:20 PM
Memtest-86 v3.2 reports 380 errors on Test 5 and 1 on test 6.
I got a badram=0x0623de40, 0xfffffffc message, too.

It's GeIL 2x512, GE5123200B, which (and I never knew this, obviously) is not actually a dual channel kit! (http://72.14.207.104/search?q=cache:aDh8Htqtg5oJ:www.geil.com.tw/phpBB2/viewtopic.php%3Ft%3D83%26sid%3Dd333a05bb69af69e35a 5fa9bab11d0d4+GE5123200B&hl=en&gl=us&ct=clnk&cd=2) Well crap, I've been using it in DC just fine for a while now. WTH?
techun
03-01-06, 07:24 PM
many many sticks that dont say dual channel...work in it

dual channel just means they work well together, same speeds, voltage, timings?
laserkitty
03-01-06, 07:46 PM
Whoops, sorry: I had the timings on auto which I believe is @ 2.5-3-3-6 and it's @ 224.2MHz & stock voltage.
laserkitty
03-01-06, 08:36 PM
Interestingly, I swapped in 2x256 (same stats as the 512, just...256) and it's blowing through Memtest where the 512 dumped.

Might have to try two different sticks of 512.
laserkitty
03-02-06, 02:03 PM
The 2x256 sticks ran all night with no issues, where the 2x512 crapped out within an hour.

I've got a set of Geil GE1GB3200BDC (2x512 & sticker says 2.5-8-4-4) I'm going to try tonight.
OnDborder
03-04-06, 02:40 PM
The 2x256 sticks ran all night with no issues, where the 2x512 crapped out within an hour.

I've got a set of Geil GE1GB3200BDC (2x512 & sticker says 2.5-8-4-4) I'm going to try tonight.
Well how did it do with the "looser" timings?
laserkitty
03-04-06, 08:39 PM
So far, so good. I'm going to let it run all night tonight (I was out of town yesterday ad shut things down).


In the interest of disclosure: It's possible I have mem controller issues (http://www.ocforums.com/showthread.php?t=441197)