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Mac Pro can't see New Ram

U

uMac

macrumors 6502
Original poster
Mar 27, 2007
250
0
Canada
I did a search and didn't find a similar,

I've installed some more ram into my Mac Pro (Matching Pairs, etc)
And when I turn it on the computer can't see them :eek:
I moved my ram around to see if it was the riser or the slot, but to no avail.
Does this mean the ram is shot, can I solve this problem, or what?

Thanks,
uMac
 
I got a pair of 512MB
Before the computer was a stock 2.0GHz (so only the processor was changed)
Primary sticks have are located in Tray 1 - Slots 1 & 2
New sticks are located in Tray 2 - Slots 1 & 2

I move the ram around a bit so its not the riser.

Oh, and I'm a techie kind of guy (PC) so I'm used to doing this sort of thing with computers.

Peace said:
Please be more specific.

What brand RAM did you buy?

Whats your stock config?

Where are the different sticks located?
Click to expand...
 
Peace said:
What brand did you buy? The config you have now is the way it's supposed to be.

Matched pairs.
Click to expand...

Nanya

Query - I thinking if its not the ram it may be the bios, how does one check the bios on a mac pro to see if its configured correctly?
 
Peace said:
I'd return the RAM and get either Crucial or even from

http://www.datamemorysystems.com/

I've bought memory from them for my Mac Pro and the sticks are fine.Run a little warm but thats expected.
Click to expand...

Yes, return the ram and get from a different spot is a solution.
However I would prefer this pair worked, as it would take less hassle and time then going and getting another 2 dimms.

Plus I would like to make sure that it is the ram and not the computer that is the problem.
 
uMac said:
Query - I thinking if its not the ram it may be the bios, how does one check the bios on a mac pro to see if its configured correctly?
Click to expand...

Macs don't BIOS. They are EFI machines.

Place the new RAM into the known good slots. Does it work? Then it's slots. Does it not work? Then it's faulty RAM.

Macs are notoriously picky about RAM.
 
Peace said:
Boot from your install disk and run the hardware test.
Click to expand...

I will try this, if this doesn't work i'll try other suggestions.
I've contacted the seller, and if I can't get the ram to work they will take it back and give me a refund.
 
uMac said:
I will try this, if this doesn't work i'll try other suggestions.
I've contacted the seller, and if I can't get the ram to work they will take it back and give me a refund.
Click to expand...

Ok...
How do I run the 'hardware test' off the install CD, I see a test for the Diskdrive, but the an overal hardware test.
 
Peace said:
Hold down the "D" key while starting up with the install DVD in the drive.
Click to expand...

Ok, done - No errors where found, I checked the profile and it did show the memory cards, but at 0MB each.

Restarted the computer, cards still not showing up.

Suggestions?
 
Did you buy the Mac new from Apple? or from a private party.

It's starting to sound like either bad memory or a riser not put in properly or even a bad riser.
 
Peace said:
Did you buy the Mac new from Apple? or from a private party.

It's starting to sound like either bad memory or a riser not put in properly or even a bad riser.
Click to expand...
Its a new (1.5 week old) Mac from Apple

The riser is fine - Right now Riser A is Riser B and New Ram is in old ram location (So Riser B is in Riser A slot with Orginal RAM, Riser A is in Riser B slot with New Ram). Trust me, I did all the combinations. If it wasn't for the different brand stickers I wouldn't be able to tell them apart.

Should I try to mix the pairs up (they are all 512 MB) or is that asking for trouble?
 
I'd suggest swapping the new ones with the ones that came originally with the computer. If the new ones still don't work in the place where the original ones were working, then the RAM is probably shot.
 
xfusejc said:
I'd suggest swapping the new ones with the ones that came originally with the computer. If the new ones still don't work in the place where the original ones were working, then the RAM is probably shot.
Click to expand...

Then the ram is probably shot (as I did swap them).
 
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