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Ram Not Working


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4 replies to this topic

#1 justjules

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Posted 29 December 2007 - 08:31 AM

hi, can anyone please help, i've just tried to install 2x 1gb sticks of pc3200 400Mhz memory into my Dell 4600 (pentium4 2.66Ghz) Desktop.
I was replacing 4x 256Mb sticks that were pc2700 333Mhz. The user manual that I got with the PC says that I can use either pc2700 or pc3200
I installed them as a matching pair ie in slots 1 and 2 as directed. Seeing as pc3200 is backward compatible I even tried installing them with a matching pair of the old pc2700 sticks. Both times I just got a bleeping from the box and nothing else no screen nothing the diagnostic lights were 2 yellow 2 green (Memory modules are detected, but a memory failure has occurred). Thats what the book says. I tried reinstalling them
and made sure that they were installed properly. I have since replaced the original memory and it works ok but this does'nt solve my problem.
Do I have to install 2x 1gb of pc2700 RAM
thanks in advance
jules. x :thumbsup:

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#2 Sterling14

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Posted 29 December 2007 - 09:12 AM

According to the crucial website, the ram is compatible with your computer so it should work fine http://crucial.com/store/listparts.aspx?mo...imension%204600

Maybe you should try the sticks in different slots, and only using one of the sticks at a time.

Maybe a stick of the ram, or both is bad.
"I think there is a world market for maybe five computers." - Thomas Watson, Chairman of IBM, 1943

#3 justjules

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Posted 29 December 2007 - 09:21 AM

hi, yeah I know eveywhere I look says it should work. tried putting in one still no joy. Is there any way I can test them apart from putting them in a PC. I did read something about BUS speed but to be honest i'm getting out my depth here.
jules

#4 Sneakycyber

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Posted 29 December 2007 - 12:41 PM

What are the timings of the new memory Vs the old memory. Guide to Memory timings (credit Google search). If the latency timings of the new memory is lower then the old memory your computer may have a problem with the faster timings. If there is a compatibility problem crucial will take the memory back since it was on their recommendation that you bought the memory. Is there a bios update available?

Edit: I just checked the link that sterling posted to and they show a CL3 and a CL 2.5 which one did you get and what is the old memory?

Edited by Sneakycyber, 29 December 2007 - 12:44 PM.

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#5 Rob7622

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Posted 30 December 2007 - 03:17 AM

According to Dell 4600 specs your ram slots are 4 bank 2gb limit. If you check your user manual very carefully you might see that single sided chips maybe the only ram you can use. What I mean by single sided is the semiconductors is on one side only on the DIMM. Semiconductors on 2 sides is read by most mobo bios as 2 bank DIMMS. So.....the ram chips you purchased are probably fine but not compatible with your single sided 4 bank system. Be sure and check the manual for your mobo as it will outline how this would work. I have experienced this problem on few boards that I have worked on. Hope this helps!



Rob




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