Multiple Artboards to PDF gives RAM error?

Question

Hi,
I am currently wondering if I do something wrong or if there are some bug involved.
I am working on a walldesign, it will be printed as 3 pages. See attached file below.
I am using the artboards for aligning the background to match bleed and content correctly.
Below i used a .tif file as background that covers all area, Then i save PDF on each artboard,
I turn off Keep illustrator edit and Acrobat 5 (PDF 1.4). All three pdfs seem to work, they open in Acrobat.
But doing it this way might corrupt the pdf?
If I import the pdf in photoshop it will give me RAM error. I have 64 gb ram in x64 enviroment  so that should
not happen when the PDF is only 10 mb? On a similiar project the printers also had trouble placing the pdf
in their printing system also complaining on RAM? Or error on "Cant rasterize the image".
If i make 3 smaller backgrounds and remove all artboards and only have 1 for each part, then the above
error don't occur and everything is fine. So i guess its either multiple artboards or that the background is to large
in someway or is kept outside the trimarea in the pdf so it stays huge. I thought everything outside the cutting area
would be cropped away if I save without illustrator edit. The pdf size seem to tell me that it has cropped everything
outside. But the ram error will occur :|
Any ideas or tips?

Answer 1

Here is a link to a crashing pdf:
http://www.reduna.com/download/crashing.pdf
It wont render in Chrome either, and trying to open in Photoshop gives me:
Could not complete the Open command because there is not enough memory(RAM)
It contains the left top part from the earlier post/photo.
Sincerely
Nicklas