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Dual Channel with Asus P5Q and TWIN2X4096-8500C5D


decstef

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I've just bought 2 new PC's with the same specs (see footer).

I usually buy parts and install all parts in the case by myself but for the first time let the vendor doing it for me.

 

With the first one i had no problem during the software installation (XP Pro + F-secure + all classical programs : firefox + office + nero + video player + iTunes + adobe stuffs + and so on.

 

During the same installation on the second one, the machine freezed twice.

 

I decided to test both with Testmem86+ (from the ubuntu 9.04 live CD) :

- no problems for the 1st one

- some errors on the 2d before it freezed.

 

Then I compared the Bios and i notice that :

- 1st had bios v 2102 and Ram Voltage on 2.1V

- 2d had bios v 1611 and Ram Voltage on Auto

The upgrade of the 2d's Bios and the adaptation of all BIOS params didn't solve my problem.

 

Finally I decided to open the cases :

- the 2 dominator's of the first one were installed on the 1st and on the 4th mem socket (a yellow one and a black one) :evil:

- the 2 dominators of the 2d one were installed on the 2 yellows

If I configure the 1st one as the 2d one (the dominator's on the 2 yellow sockets) memtest86+ find more than 500 errors in less than 5 minutes (before i stop it) ... still worse.

If I configure the 2d one as the 1st (1 dominator on the first yellow socket and the second on the last black one) memtest86+ don't find any problem.

 

Following your advice (in one of the forum's thread) I change the CAS option from auto (5-5-5-18) to manual (5-5-5-15) in the BIOS.

I also read that Legacy USB must be disabled but my keyboard and mouse are USB-ones !!

Oh yes, I also tried to put 1.3V for the NB Voltage ... not better

 

Pleeeeeeeeeease help meeeeeeeeee :)

How can I configure these PC's in order to let them run in Dual Channel without freezes or mem errors ?

 

Regards

Stef

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So both systems are showing the same errors with both sets of memory from each computer? That's just wierd.

 

To clarify the correct setup, your motherboard states that a single pair of memory should be in the same colored slots (1/3 or 2/4).

 

To get a baseline, I'd test each stick of memory in the same slot using Memtest86+ v2.11. I don't know what version of memtest is on your CD. Assuming they pass, you know the memory's fine (as well as that slot). I'd then test one of those sticks in the other slots to make sure they're fine.

 

Some versions of this memory require 2.2v, so check the label of the memory itself.

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So both systems are showing the same errors with both sets of memory from each computer? That's just wierd.

 

To clarify the correct setup, your motherboard states that a single pair of memory should be in the same colored slots (1/3 or 2/4).

 

To get a baseline, I'd test each stick of memory in the same slot using Memtest86+ v2.11. I don't know what version of memtest is on your CD. Assuming they pass, you know the memory's fine (as well as that slot). I'd then test one of those sticks in the other slots to make sure they're fine.

 

Some versions of this memory require 2.2v, so check the label of the memory itself.

 

The display when it freezed is something like this (2 sticks in yellow slots) :

Memtest86+ v2.11 | Pass 36% #########

Intel Core 2 3173 MHz | Test 71% #############################

L1 Cache: 32K 44684 MB/s | Test #5 [?????????????????????????]

L2 Cache: 6144K 20735 MB/s | Testing: 4096M - 4864M 4095M

L3 Cache: None | Pattern: 6f275f1e-8

Memory : 4095M 5167 MB/s |--------------------------------------------------

Chipset : Intel P45/G45 - FSB : 334MHz - Type: DDR2

Settings: RAM : 534 MHz (DDR1068) / CAS : 5-5-5-18 / Dual Channel

-------------------------------------------------------------------------------

WallTime Cached RsvdMem MemMap Cache ECC Test Pass Errors ECC Errs

--------- ------ ------- -------- ----- --- ---- ---- ------ --------

2:09:47 4095M 636K e820-Std on off Std 3 0

-------------------------------------------------------------------------------

Tst Pass Failing Address Good Badors ErrBits Count Chan

--- ---- ---------------- ----- ------- -------- ----- ----

6 2 0010af7f870 4271.9MB ffffffdf ffff00df 0000ff00 1

6 2 0010af7f878 4271.9MB ffffff7f ffff007f 0000ff00 2

 

 

But in case of sticks placed in different color slots (without errors or freeze) :

 

Memtest86+ v2.11 | Pass ??% ################################

Intel Core 2 3173 MHz | Test ??% ################################

L1 Cache: 32K 44684 MB/s | Test #? [?????????????????????????]

L2 Cache: 6144K 20735 MB/s | Testing: 144K - 2048M 4095M [or] 2048M - 3327M 4095M [or] 4096M - 4864M 4095M

L3 Cache: None | Pattern: ??????????

Memory : 4095M 4430 MB/s |--------------------------------------------------

Chipset : Intel P45/G45 - FSB : 334MHz - Type: DDR2

Settings: RAM : 534 MHz (DDR1068) / CAS : 5-5-5-18 / Dual Channel

-------------------------------------------------------------------------------

WallTime Cached RsvdMem MemMap Cache ECC Test Pass Errors ECC Errs

--------- ------ ------- -------- ----- --- ---- ---- ------ --------

14:32:38 4095M 636K e820-Std on off Std 18 0

(later)

17:40:46 4095M 636K e820-Std on off Std 22 0

(later)

23:09:50 4095M 636K e820-Std on off Std 18 0

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OK, I'm ready to begin the test with the 2d machine (the 1st one is currently at about 100 km from here)

 

The labels on both stick are the same :

CM2X2048 - 8500C5D

XMS2-8500 2048MB 1066MHz 5-5-5-15 2.10V ver 2.2 09191886

 

What do you want i test first ?

 

only 1 stick in the first yellow slot and then test again but with de second stick alone on the same yellow slot and then the first stick alone but in the second yellow and finally the second stick alone in the second yellow slot ? [i hope I don't need to test the black ones :) ]

 

Do you want i test also the 2 sticks in both yellow slots and then again but after switching the 2 ?

 

And what about BIOS config ?

+ Ram Voltage@auto or 2.1V ?

+ NB Voltage@auto or 1.3V ?

+ CAS autol@5-5-5-18 or manual@5-5-5-15

+ Legacy USB auto or enable or disable ?

 

Stef

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The timings / voltage for the memory are on the memory label itself. I'd only change other voltages if you find errors. The order in which you test stick / slot doesn't matter; only the results.
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The test with the first stick on the first yellow socket runs for 3 hours 14 minutes (9 Passes and 11%) without any error.

+ Ram Voltage@2.1V

+ NB Voltage@1.3V

+ CAS @5-5-5-15

 

Memtest86+ v2.11 | Pass 11% ################################

Intel Core 2 3173 MHz | Test ??% ################################

L1 Cache: 32K 44684 MB/s | Test #? [?????????????????????????]

L2 Cache: 6144K 20735 MB/s | Testing: 144K - 2048M 4095M [or] 2048M - 3327M 4095M [or] 4096M - 4864M 4095M

L3 Cache: None | Pattern: ??????????

Memory : 2047M 3975 MB/s |--------------------------------------------------

Chipset : Intel P45/G45 - FSB : 334MHz - Type: DDR2

Settings: RAM : 534 MHz (DDR1068) / CAS : 5-5-5-15 / Single Channel

-------------------------------------------------------------------------------

WallTime Cached RsvdMem MemMap Cache ECC Test Pass Errors ECC Errs

--------- ------ ------- -------- ----- --- ---- ---- ------ --------

3:14:27 2047M 636K e820-Std on off Std 9 0

 

 

 

 

I will now stop it in order to test the second stick on the second yellow socket also for a couple of hours while i'll go to sleep ( it's 00:34 here)

 

Stef

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Hi,

06:10 AM

I stopped the second test which also ran without any problem during 5hours and 29 minutes.

Here is the display at this time :

 

+ Ram Voltage@2.1V

+ NB Voltage@1.3V

+ CAS @5-5-5-15

 

Memtest86+ v2.11 | Pass 53% ################################

Intel Core 2 3173 MHz | Test 69% ################################

L1 Cache: 32K 44684 MB/s | Test #? [?????????????????????????]

L2 Cache: 6144K 20735 MB/s | Testing: 144K - 2048M 4095M [or] 2048M - 3327M 4095M [or] 4096M - 4864M 4095M

L3 Cache: None | Pattern: ??????????

Memory : 2047M 3975 MB/s |--------------------------------------------------

Chipset : Intel P45/G45 - FSB : 334MHz - Type: DDR2

Settings: RAM : 534 MHz (DDR1068) / CAS : 5-5-5-15 / Single Channel

-------------------------------------------------------------------------------

WallTime Cached RsvdMem MemMap Cache ECC Test Pass Errors ECC Errs

--------- ------ ------- -------- ----- --- ---- ---- ------ --------

5:29:16 2047M 636K e820-Std on off Std 15 0

 

 

 

I think this is enough to be sure both sticks and slots are ok but i just started with the first stick again but on this second yellow socket ... to be 1000% sure :D:

 

Stef

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Well,

It's done with the 2 other couples "stick/yellow slot".

05:29 without errors for 15 passes and 57%

07:03 without errors for 19 passes and 72%

 

Both yellow slots and both memory sticks seem to be OK.

What do we do now ?

 

Stef

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Hi,

I would suggest that you clear the CMOS first by removing the battery and reset the "Clear CMOS" through the jumper setting first. After that try this setting:

 

RAM Voltage @ 2.1V

NB Voltage @ 1.26-1.3V

CAS @ 5-5-5-15 @ DDR2 1066

 

or if it's still not stable, try using the DDR2 800 speed with the following setting:

 

RAM Voltage @ 1.9V

NB Voltage @ 1.26-1.3V

CAS @ 5-5-5-18 @ DDR 2 800

 

I have the same MB and RAM as yours. I can run it at Dual Channel @ 4Gb and even @ 8Gb but the it's stability will wane after a week or two which resulting random BSOD. Last night, I just clear the CMOS and start all over again with the BIOS setting. So far so good and I feel the 8Gb @ DDR2 800Mhz system run faster compare to before.

 

p/s: Don't forget to disable the USB Legacy setting before running Memtest. If any error occur during Memtest, stop the test as it's meaningless to continue running the test. You can use either the yellow slot or the black one since there is no different between the unless you are OCing your PC.

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  • 2 weeks later...
Hi,

I would suggest that you clear the CMOS first by removing the battery and reset the "Clear CMOS" through the jumper setting first. After that try this setting:

 

RAM Voltage @ 2.1V

NB Voltage @ 1.26-1.3V

CAS @ 5-5-5-15 @ DDR2 1066

 

or if it's still not stable, try using the DDR2 800 speed with the following setting:

 

RAM Voltage @ 1.9V

NB Voltage @ 1.26-1.3V

CAS @ 5-5-5-18 @ DDR 2 800

 

I have the same MB and RAM as yours. I can run it at Dual Channel @ 4Gb and even @ 8Gb but the it's stability will wane after a week or two which resulting random BSOD. Last night, I just clear the CMOS and start all over again with the BIOS setting. So far so good and I feel the 8Gb @ DDR2 800Mhz system run faster compare to before.

 

p/s: Don't forget to disable the USB Legacy setting before running Memtest. If any error occur during Memtest, stop the test as it's meaningless to continue running the test. You can use either the yellow slot or the black one since there is no different between the unless you are OCing your PC.

 

Hi,

I'm back (problem with my Internet Provider)

1. What's the purpose of the clear CMOS operation ? (I know what it does but why in my case)

2. How do you run the test without USB while both keyboard and mouse are USB one's ? (just to know ... got old one's but i don't like to mix old and new devices)

3. What's the best solution (and why) : single channel 5-5-5-18 DDR2 1066 (running fine so far) or dual channel 5-5-5-15/18 DDR2 800 ?

 

Stef

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Hi,

 

1. Anyway, this is the recommended step provided by the Asus website. Clearing CMOS will bring the CMOS setting back to the default factory setting (which I think is the most stable). Everytime you add a new component when you built your system, some changes will happens to the CMOS' settings. Most probably some "residue" from the previous setting still left somewhere in the CMOS memory. I think while loading the BIOS during start up, some of this "residue" memory will be loaded up instead of the current setting, therefore causes instability in the system.

 

2. By disable the USB legacy device in the Asus' motherboard setting, it will prevent uploading any unnecessary program/driver onto the RAM memory, hence less interference to the Memtest itself. If you are using Memtest that are to loaded from the CD-ROM itself, there no need to worry about the disable USB keyboard. The test will upload itself and run immediately. (By the way, you will have to set the CD-ROM/DVD-ROM boot up to preceed you Hard Disk). The downsides is that you can't reconfigure the test itself and you have to stop the test by pushing the reset button on your casing.

 

3. In my opinion, I'll rather run it in dual channel @ 800Mhz than as a single channel @ 1066Mhz. You won't feel much different between 800Mhz and 1066Mhz, but you will definitely benefit from the dual channel (64bit) and higher RAM capacity.

 

To sum up, clear the CMOS and start over again. My choice would be a dual channel @ 1066Mhz first, but if you still can't stabilize it, then get it running at 800Mhz dual channel. FYI, I was able to run my MB at 4Gb dual channel @ 1066Mhz, although the stability wanes after few weeks. (At that time, I was using all default setting and never reset the CMOS after some minor upgrade). And now, I'm using 8Gb dual channel @ 800Mhz. The stability is good so far after resetting the CMOS.

 

jb

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