MP All Models New RAM not being seen

[Stan was]

Hi.
I have an early 2008 Mac Pro and have given it a boost with new RAM.
The only way I can get it to see the memory is by using the "control/alt/p/r" PRAM method - each time I open up..
Is there a way I can get the old lady to remember it's there?
Cheers

 

[MarkC426]

What are the details of the memory....?

 

[Stan was]

What are the details of the memory....?

I had 4gb and have added another two 4gb pairs, making 12 in total. All are in correct pairs in the riser.

 

[MarkC426]

I mean manufacturer and description, i.e. ecc, rdimm etc.
All ram sticks need to be the same spec.

 

[OS6-OSX]

 

[Sullivan0930]

I had 4gb and have added another two 4gb pairs, making 12 in total. All are in correct pairs in the riser.

probably different speeds. i mean 2008 and 2021 is a big gap. Id take the old ones out and see if the new ones are recognized as a pair.

 

[Stan was]

Thanks one and all for your help. My Mac Pro is now reading all the ram. Maybe it just needed a few starts for it to remember? Anyway, fingers crossed it's all working.

Cheers.

 

[Stan was]

A (delayed) update in case anyone is interested. My Mac stopped reading the ram again almost immediatly. It turns out I'd been sent faulty units. The replacements have all been fine. I dealt with Dr Memory from Manchester in the UK and a thumbs up to them.

 

[Stan was]

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