Update: OWC has announced 4GB memory modules for the Mac Pro Nehalem at far lower prices than Apple’s. I’ll be stress-testing a 32GB configuration over the weekend and reporting on them.
Need more than 16GB in your 8-core Mac Pro (which has 8 slots) or more than a measly 8GB in the 4-core Mac Pro (which has 4 slots)? Photoshop users working with many larger files or huge files have very good reason to want 32GB, as my Photoshop CS4 performance tests show.
Prices for 4GB modules from Apple are downright scary, see below. Stay tuned for a 32GB test this weekend and news of a very nice price reduction for anyone needing 4GB modules for the Mac Pro Nehalem.