Mac pro 1,1 RAM issue

[olsend81]

I have 2 x 512mb an 1 x 1gb ram loaded in my mac. The system at first only recognized 1 x 512mb i reseated the ram and now it will recogonize 2 x 512mb. Dont know if the 1gig stick is bad or if there is anything else I should try? Any help would be appreciated.

 

[Tesselator]

Apple says that memory must be installed in matched pairs. So you need at least 2 of any modules. Some folks have reported that single DIMMs work but Apple says no. So this might be your trouble.

I think Intel says no too IIRC, and they created the controller so they would know.

 

[olsend81]

If that we're the case the computer would have never shown only 1 x 512mb at one point? Right? Is there a software program to test ram?

 

[macuser453787]

Tesselator is correct, and everymac.com agrees: The RAM modules should be installed in pairs (i.e. matched pairs).

 

[Tesselator]

Yup. He's not the first person to have a single module actually show up anyway tho. Kinda interesting.

 

[macuser453787]

Yup. He's not the first person to have a single module actually show up anyway tho. Kinda interesting.

Yeah, little oddities like that can make troubleshooting a bit of a bear - especially when a condition that shouldn't be, sometimes is!

Dunh dunh Duuuunnnh!