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Memory Upgrade


Marcoaur

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My game machine is:

XP 2600+ @ 3400+ (1.91 -> 2.3 Mhz; FSB 333 to 400 Mhz)

Asus A7N8X-E Deluxe 2.00, BIOS 1011

 

512 MB Dual (2 x 256 MB) Corsair V. Select VS256MB400

VS32MB

PS1300437

LOT 0437007-0

 

Seagate SATA 120 GB

MSI Radeon 9800XT

Monitor 21"

 

The system like that is 100% stable.

 

I would like to add more 512 MB - VS512MB400 in the free mamory slot. In fact the memory stick is already bought. Further info from the stick:

VS32MB

PS1300506

819-0505073-0

 

The 256 MB sticks were fitted on dual channel A1 and B1 (blue ones) and the system is 100 % stable. It´s running for 6 months like that.

 

The 3rd stick was fitted on the last connector (black one).

 

The system booted without problem. Sandra, AIDA and Everest recognized the three sticks. The read and write benchmark showed 3.0 GB/s and 1.1 GB/s respectevely.

 

Then I start playing NFS Underground. By 20 minutes the system was OK. Then crashed in a way I could not even reboot the system. After I remove the 512 MB stick the system was ok.

 

Questions:

 

1) What means the specification PS100437 in the 256 MB stick against PS1300506 from the 512 MB one?

2) I have searched in the forum, the Asus MB does not like dual channel in the three memory slots. Relax the latencies and increase the voltage to 2.7 can help (I didn´t tried yet) to minimaize the instability;

3) What is the correct way to fit more 512 MB in a system which has already 2 x 256 MB? I suppose it´s better to fit 2 x 256 MB in one "channel" and the 1 x 512 MB in another "channel".

4) What else to do to improve the stabiity?

 

Regards, Marco.

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1) What means the specification PS100437 in the 256 MB stick against PS1300506 from the 512 MB one?

A: I do not know what you are asking about, as these #'s are not ours.

 

2) I have searched in the forum, the Asus MB does not like dual channel in the three memory slots. Relax the latencies and increase the voltage to 2.7 can help (I didn´t tried yet) to minimize the instability;

A: All of the modules should be exactly matched for best performance. Sometimes its tricky mixing memory; even the same modules but purchases at different times.

 

3) What is the correct way to fit more 512 MB in a system which has already 2 x 256 MB? I suppose it´s better to fit 2 x 256 MB in one "channel" and the 1 x 512 MB in another "channel".

A: The best would be to use 2 matched modules with this platform.

 

4) What else to do to improve the stability?

A: If you are having problems with stability, I would test the components in another system if you can to isolate the problem.

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Ram guy, I expect a better answers from you. You wrote but you said nothing in the end.

 

1) What means the specification PS100437 in the 256 MB stick against PS1300506 from the 512 MB one?

A: I do not know what you are asking about, as these #'s are not ours.

Yes, it´s a number written on the memory chip. It´s not a sticker!!!

 

2) I have searched in the forum, the Asus MB does not like dual channel in the three memory slots. Relax the latencies and increase the voltage to 2.7 can help (I didn´t tried yet) to minimize the instability;

A: All of the modules should be exactly matched for best performance. Sometimes its tricky mixing memory; even the same modules but purchases at different times.

I already undertood but, based on your experience, you could have told me to increase Vdimm, relax latencies, etc

 

3) What is the correct way to fit more 512 MB in a system which has already 2 x 256 MB? I suppose it´s better to fit 2 x 256 MB in one "channel" and the 1 x 512 MB in another "channel".

A: The best would be to use 2 matched modules with this platform.

Forget, I have asked if I need to add. To throw away and buy new modules it´s easy to answer but expensive. If you pay, nice. Could you give me your credit card number??? Come on!

 

4) What else to do to improve the stability?

A: If you are having problems with stability, I would test the components in another system if you can to isolate the problem.

My system is 100% stable with 2 x 256 MB or 1 x 512 MB. They together I have the instability!!

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"1) What means the specification PS100437 in the 256 MB stick against PS1300506 from the 512 MB one?

A: I do not know what you are asking about, as these #'s are not ours.

Yes, it’s a number written on the memory chip. It’s not a sticker!!!"

 

I am sorry but this is not our part#. There should be a label on the module with our part that I would need. Which the information I needed was in your first post, sorry I missed that, but the questions thru me off.

 

2) I have searched in the forum, the Asus MB does not like dual channel in the three memory slots. Relax the latencies and increase the voltage to 2.7 can help (I didn’t tried yet) to minimize the instability;

A: All of the modules should be exactly matched for best performance. Sometimes its tricky mixing memory; even the same modules but purchases at different times.

I already understood but, based on your experience, you could have told me to increase Vdimm, relax latencies, etc

You had already mentioned that, and I need to know the modules part# in question #1 before I know what to tell you!

 

3) What is the correct way to fit more 512 MB in a system which has already 2 x 256 MB? I suppose it’s better to fit 2 x 256 MB in one "channel" and the 1 x 512 MB in another "channel".

A: The best would be to use 2 matched modules with this platform.

Forget, I have asked if I need to add. To throw away and buy new modules it’s easy to answer but expensive. If you pay, nice. Could you give me your credit card number??? Come on!

Sorry but no I cannot do that, and this was merely stating the configuration not that you should throw anything away

Again, I needed to know all of the modules part#'s before I would speculate on the configuration and the bios settings. But based on what you have posted I would install the 2-256 meg sticks in slots 1-2 and the 512 Meg in slot 3 then go to bios setup load setup defaults and set the Dim Voltage to 2.8 Volts and set the timings manually to what listed bellow

 

CPU Freq: 166 MHz

System Performance: User Define

Memory Frequency: 100%

Dim Voltage to 2.8 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 7-8T (7 @DDR333 8@ DDR400)

 

Please note you would not be able to get as high of an over clock when the system is fully loaded with memory because of chipset loading. I would use http://www.memtest.org to test the system and as you raise the CPU Freq you will need to lower the CPU multiplier. The system will probably top out at about 190-210 MHz with this configuration.

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1) Memory sticks I have are:

a) 2 x 256 MB VS256MB400. On each memory chip it´s markek (it´s not a sticker) VS32M8 and PS1300437. Both 2.5-3-3-6.

b) 1 x 512 MB VS512MB400. On each memory stick is´s marked VS32M8 and PS1300506. 2.5-3-3-6

If you need a photo to believe, send me a mail where I can send a photo.

So, what means PS1300437 and PS1300506 in each memory chip?

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Hello!

 

What I tried was:

 

2 x 256 in one "channel" (A1 and A2) and 1 x 512 in another "channel" (B1). Then, I increased the Vdimm to 2.7 V.

The latencies are 2.5-3-3-8 and FSB in 200 Mhz (I´m almost sure at 166 Mhz the stability would be great).

Prime 95 has run by 1 hour and then an error ocurred in WINXP. I don´t know if because the memories or other thing.

 

What else you suggested beside to increase Vdimm to 2.8V?

I will test with Memtest to see what happens...

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I ran the Memtest86 with version 1.27 and 1.55.

 

With version 1.55 no errors at all. I have run 6 loops (2,5 h under testing) on the standards tests. Weird I could not run all tests because remaining three tests were not available in version 1.51.

 

With version 1.27 I ran ALL tests (5,5 h iunder testing) and 4 errors were reported as follows:

 

TST PASS FAILING ADDRESS GOOD BAD ERR-BITS COUNT

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

8 0 0003e5e8e90 - 997.5 MB ffffffff dfffffff 20000000 1

8 0 0003ea90f50 - 1002.0 MB ffffffff feffffff 01000000 1

8 0 0003e5e8e90 - 1013.0 MB ffffffff dfffffff 20000000 1

8 0 0003ea90f50 - 1018.5 MB ffffffff feffffff 01000000 1

 

Is there any explanation why I have error on 1.27 version and not in 1.55?

Vdimm still 2.7 V.

 

Regards, Marco.

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