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Did I blow out my P5E, or two diff DIMM sets? Help!

post #1 of 12
Thread Starter 
Is it my mainboard, or my memory that went south? Help!

I have two sets of DDR2-800, mushkin 2gb x 4, and OCZ 1gb x 4. The mushkins optimize at 4-4-4-10 @804, but go to 5-5-5-18 (their rated timings), and they overclock, all 8gb, at 1103Mhz, leaving DRAM voltage at AUTO. All's well. Been running several days, super well cooled, no problems. Just for fun I decide to o'c the OCZ's, they go fine to 1050Mhz CAS 4, for some very nice FSX performance, everest at 52.7ns, 9325mb/sec read rate. I ran these for several days in this fashion, totally stable. Loved it! I decided for one last config, loosed the timings to 5-4-5-15, tried for 1200Mhz, it POSTED, then BSOD while loading XP desktop. That was the OCZ 1gb x 4 set. I activated a BIOS reset, rebooted, and discovered over an hour or so that the suckers lost ALL overclockability. I'm thinking one or more of the OCZ's got hosed, even tho I ran them at EPP rated 2.4v. Tried selectively eliminating pairs, but did not find any one pair worked better than the other pair. Took em out, put the mushkins in, and now THEY won't o'clock at all!

What the heck happened? Since the mushkins worked super for many days, and I took them out in perfect shape (ie, they booted and ran fine the last boot), and only the OCZ's were taken up to 1200Mhz, must it not be the mainboard that somehow became compromised? As one last test, I moved 2 x 2gb of mushkins from SLOT A pair, to SLOT B pair (which worked fine previously)--WOULD NOT BOOT NOW! Reseated the DIMMS and cleared CMOS, WOULD NOT BOOT! These are the Mushkins now!

Help! Not sure what to do, but I do want the better performance for FSX.

Thanks for any insights or guidance. I'm bummed!
Noel
post #2 of 12
Are you aware that the P5E overvolts the ram by +.06v? So if you set them at 2.4v in bios, they where actually running at 2.46v
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post #3 of 12
It sounds like you know what you're doing and are obviously more vested in the memory area than I am.

Since the Mushkins are now showing problems (i.e. no overclockability) ONLY after you experienced problems with the OCZs, I would say that points to a motherboard issue. 2.4v across four DIMMS at those speeds seems like it would put a lot of strain on the memory controller.
post #4 of 12
Smoked Da ram.
post #5 of 12
Thread Starter 
Quote:
Originally Posted by ericeod View Post
Are you aware that the P5E overvolts the ram by +.06v? So if you set them at 2.4v in bios, they where actually running at 2.46v
No, not really. I had read some testimony that it was up about that using a meter but wasn't sure if this was unique to the particular mainboard or was consistent throughout all P5Es. All I know is, BOTH sets aren't working as previously, so it may well be the memory controller. I know with the mushkins i had run tRD at 7 dialed back to 5 using TRANSACTION BOOSTER of +2 in the bios, for many many months, all 4 2gb DIMMS. I think TRANSACTION BOOSTER affects MCH Read Delay and now I am unable to use any TRANSACTION BOOSTER with the mushkins. I had memory on AUTO tho, so I think that overvolted them or so I've read.
post #6 of 12
Quote:
Originally Posted by Xx573v3xX_Z28 View Post
Smoked Da ram.
I don't care if mobo overvolts or not, you are going to smoke DDR2 at 2.4.
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post #7 of 12
Thread Starter 
Quote:
Originally Posted by MNiceGuy View Post
It sounds like you know what you're doing and are obviously more vested in the memory area than I am.

Since the Mushkins are now showing problems (i.e. no overclockability) ONLY after you experienced problems with the OCZs, I would say that points to a motherboard issue. 2.4v across four DIMMS at those speeds seems like it would put a lot of strain on the memory controller.
I kinda agree with that. Furthermore, I am unable to run the FSB beyond 333 now, and I had no troubles running for 2.5 months at 402, and more recently at 440 with awesome perf from the OCZs, and icey cool.

I guess it's time for a new mainboard. This thing has been in service about 2.5 months. A real bummer. I was so stoked by how well this thing flies. Not sure what to do from here. Don't know if my memory is bad or not. At stock timings and FSB of 333 (I have a QX processor) MemTest shows no erros in 4 x 2GB DIMMS. But again, it's pretty sluggish latency and perf and will not do I'm afraid.

If I got a different mainboard, would I have to reinstall XP fresh? Bummer . . .
post #8 of 12
Quote:
Originally Posted by ncp10 View Post
No, not really. I had read some testimony that it was up about that using a meter but wasn't sure if this was unique to the particular mainboard or was consistent throughout all P5Es. All I know is, BOTH sets aren't working as previously, so it may well be the memory controller. I know with the mushkins i had run tRD at 7 dialed back to 5 using TRANSACTION BOOSTER of +2 in the bios, for many many months, all 4 2gb DIMMS. I think TRANSACTION BOOSTER affects MCH Read Delay and now I am unable to use any TRANSACTION BOOSTER with the mushkins. I had memory on AUTO tho, so I think that overvolted them or so I've read.

Yeah, it is the same for all the ASUS X38 DDR2 boards. It might have been too much for the memory controller to handle.
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by crazcookye View Post
I don't care if mobo overvolts or not, you are going to smoke DDR2 at 2.4.
What do you base this strong statement on? The OCZ was rated a 2.4v EPP, lifetime warrantied. The modules were VERY cool. Why should they "smoke?" They are COLD to the touch . . .
post #10 of 12
Just RMA the board to ASUS. Here is their RMA Dept:
510-739-3777 Ext. 5105
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