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My ASUS a7V333 doesn't see Samsung 1GB DDR RAM PC-2700 184-Pin DIMM

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November 4, 2011 5:26:44 PM

Hello !

As in topic : I've recently bought this RAM, tried to install it but my motherboard can't see it, BIOS technically. It's plugged in correctly, so I don't know what's going on with it.. Compatibility issues ? Any ideas ?

Thanks in advance. :) 
a c 717 V Motherboard
November 4, 2011 6:18:34 PM

Welcome to Tom's Forum! :) 

It depends on what the 'other' RAM is: Frequency PC2700 (DDR333), CAS Timings, Voltage and IF DS/SS mix i.e. 2x512 (SS) + 1x1GB (DS).

You can identify the other RAM easily with CPU-z - http://www.cpuid.com/softwares/cpu-z.html and look that the 'SPD' tab for each slot.

Unfortunately, ASUS's website is down and has been most of the day so I cannot access your manual.
November 4, 2011 6:26:00 PM

hello :) 

Unfortunately, I'm Linux MInt user so CPU-z is not an option for me. :( 
a c 717 V Motherboard
November 4, 2011 7:06:38 PM

Problem as I assumed - "DS/SS mix i.e. 2x512 (SS) + 1x1GB (DS)" this is typically a no-no, so either 3x512MB or if possible 3x1GB. I say possible because the only info I have seen for your MOBO is the 3xDIMM slots, BUT many of those older MOBO's have a limit of 2GB or 2x1GB.

Once ASUS's site is back up I can review the manual.
November 4, 2011 7:09:42 PM

I have a manual on my hard drive, so I can upload it if you want. :) 
a c 717 V Motherboard
November 4, 2011 7:43:39 PM

Okay looking for 'odd' stuff:

1. If the RAM has more than 18 chips - it's not supported.

2. Rule-out bad stick and 'SPD' issues - try the following:
(a) CPU: | 1GB(1) | 1GB(2) | blank |
(b) CPU: | 1GB(1) | blank | blank |
(c) CPU: | 1GB(2) | blank | blank |

IF (b) and (c) work but not (a) then:
(d) CPU: | 1GB(2) | 1GB(2) | blank |

3. Do both the 512MB and 1GB have 'chips' on both sides?

November 4, 2011 8:02:14 PM

I too still run an A7V333, but the middle memory slot died a couple years ago. Perhaps you have a dead slot? I currently can run a max of 2GB:

1GB | blank | 1GB
a c 717 V Motherboard
November 4, 2011 8:05:46 PM

Also try in the BIOS:

CPU/Memory Frequency Ratio -> DDR-266 (less than PC2700 e.g. PC2200)

I'm not certain of the menu options, so you'll need to post them.
a c 717 V Motherboard
November 4, 2011 8:11:09 PM

red2001tj said:
I too still run an A7V333, but the middle memory slot died a couple years ago. Perhaps you have a dead slot? I currently can run a max of 2GB:

1GB | blank | 1GB

Possibly and sure I've seen bad DIMM slots.

If the following fails then sure it's likely you have a bad DIMM slot.
CPU: | blank | 512MB | blank |

You can 'try' cleaning the DIMM slot: Use Isopropyl alcohol, dampen the RAM stick's contacts, fully insert in the DIMM slot with the moist RAM, remove, wipe-off, re-dampen and repeat then wipe-off and allow 5 minutes to fully dry. Re-install the RAM and cross your fingers.
November 5, 2011 5:27:34 AM

unfortunately, none of above fixes work for me, still not booting but I have no 'ram not detected' beep now..

512 has on one side, 1GB on both (16).
November 5, 2011 5:35:12 AM

EDIT: still beep sound, so it's not better.
November 5, 2011 5:36:44 AM

EDIT: still beep sound, so it's not better.
November 5, 2011 5:53:18 AM

Could one of moderators delete this one and one of previous posts ? My Opera Mini froze and send that message twice :/ 
November 6, 2011 7:44:48 AM

Ok, looks like it's compatibility/DDR problem, because other RAMs (256x2) work in these slots.
a c 717 V Motherboard
November 6, 2011 8:38:27 PM

Then the solution seems clear, get compatible RAM or settle for 2x1GB.
!