Solved Computer not detecting both ram sticks at once

October 13, 2012 at 11:52:57
Specs: Windows 7
Here is what I have going on…I installed a new stick of RAM, we will call it “NEW” into slot 2 of 2. The computer then recognizes this installation; however, states I have nothing installed in slot 1. So I swap the sticks of RAM to in their slots, I put NEW into slot 1 and OLD into slot 2. Then I show having RAM installed in slot 1 and nothing in slot 2. I remove NEW from slot 1 and now show I have RAM (OLD) in slot 2.

So the slots work, the RAM works, everything is compatible. The problem is that when both sticks of RAM are installed the only one the will register is the NEW one…any ideas?


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✔ Best Answer
October 18, 2012 at 17:17:10
Okay, so I bought another memory stick (lets call it NEW B), the exact same one as the other that I bought (NEW A) put it in and still the computer would only see NEW A. so i tried NEW B by its self and it worked just fine. So I put in "OLD" and "NEW B" BOOM!!! we are off to the races both work TOGETHER.

In conclusion NEW RAM stick A does not play well with others...



#1
October 13, 2012 at 12:01:41
No real idea. You need to post complete computer specs or exact manufacturer and model number. We gotta know what we're working on.

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#2
October 13, 2012 at 12:06:12
Sorry about that…my computer is a HP Pavilion a1616n pre-installed with 1G of RAM I bought 1G Kingston PC2-4200 240 pin DIMN

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#3
October 13, 2012 at 12:21:31
Good; we can look around now and see if that thing might be picky with memory or if others have the same problem.

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Related Solutions

#4
October 13, 2012 at 13:36:46
I'd be thinking the board was bad. To test it, you'd have to have two known good memory to use.

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#5
October 13, 2012 at 13:45:58
Most likely the two stick of memory are different enough (voltage, speed, latency, etc.) that they either cannot be used together or they need to be manually reset in the BIOS to be able to run together. If they cannot (or you cannot find a setting both can run at) then you need to get a second stick exactly like the 'new' one.

You have to be a little bit crazy to keep you from going insane.
---- Save Big Bird -----


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#6
October 13, 2012 at 19:32:31
so this is interesting i downloaded CPU-Z and in that program both sticks of RAM are found...

RAM : 2048 MB DDR2 Single Channel
RAM Speed : 266.5 MHz (Unknown) @ 4-4-4-12
Slot 1 : 1024MB (4300)
Slot 1 Manufacturer : Hyundai Electronics
Slot 2 : 1024MB (4300)
Slot 2 Manufacturer : Kingston

in addition the timing tables readout on both are the same.

so a BIOS issue????


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#7
October 14, 2012 at 14:09:20
It is hard to guess still. Only known good memory that is similar enough and recommended by the OEM can be used. Any deviation from that may render memory issues. To test the board, you need two known good memory cards that are either exactly the same or proven to work in this board.

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#8
October 14, 2012 at 20:46:16
CPU-Z is listing what they are running at, you also need to read what the memory says on the stickers to see if they will run at that setting, possibly experimenting to get it to run, or purchase a matched pair of memory sticks that will definitely run on your board.
Run Memtest86 from a bootable CD and see:
If the memory is properly detected there.
If there are any memory errors at that setting.
Errors are not acceptable in memory. Manually resetting the timings 'looser' and possibly the voltage a tiny bit higher may resolve this, but a retest through more than one cycle would be required to verify it is stable and 'solid' to use.

Going back, I always use matched memory sets on DDR2 and DDR3 memory for best results.

You have to be a little bit crazy to keep you from going insane.
---- Save Big Bird -----


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#9
October 18, 2012 at 17:17:10
✔ Best Answer
Okay, so I bought another memory stick (lets call it NEW B), the exact same one as the other that I bought (NEW A) put it in and still the computer would only see NEW A. so i tried NEW B by its self and it worked just fine. So I put in "OLD" and "NEW B" BOOM!!! we are off to the races both work TOGETHER.

In conclusion NEW RAM stick A does not play well with others...


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#10
October 18, 2012 at 18:08:00
Go figure...

Anyway, glad you got it sorted out. Good job.

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