Hardware/Ram tests for osx : recommendations?

[progress@adobeforums.com]

when apple's own hardware tester doesnt show anything does anyone know of any tools for tracking the fault down that corrupts PS files...?

looks like its corrupting them on opening as they can be opened fine again even if the file has previously reported and displayed corruption.

Checked cables etc inside, disconnected everything outside, kingston ram and whatever apples ship with inside.

[Ramón_G_Castañeda@adobeforums.com]

Progress,

I haven't had time to investigate this, but is the Apple Hardware Test contained in the install DVDs that come with the Mac the same as the Tech Tool Deluxe that comes on the Apple Care Protection Plan CD?

[g_ballard@adobeforums.com]

Mac Fixit had a giant thread on this subject a month or two ago...

My two cents, plus Chris Cox's sterling:

<http://www.gballard.net/macrant/ram.html> The recommended test is to
pull the DIMMs and rule each one out individually...





Unless the RAM is fried or you get lucky, the testers are not very good.

Adobe Photoshop engineer Chris Cox, wrote me (about the RAM testers):

"Ballard,
Timing problems are the biggest case that most test programs won't catch.
Yet applications will hit them maybe 1/10,000,000 times Ñ which is often enough to cause problems.

"Also, testing programs are not using AltiVec or streaming cachehints Ñ which change the memory access patterns.

"Testing programs also do most of their testing linearly through memory Ñ which does NOT test rapid page (CAS) changes (which applications sometimes cause)."
Chris