Several new options for 128 GB RAM upgrades have launched since that time, offering consumer more choices in sourcing their RAM. Last week, MacMall began selling 32 GB modules from Axiom for $620, thus matching Transcend's $2480 price for the full 128 GB kit.
And today, OWC announced its own kit, offering the full 128 GB for $2130, a savings of $350 over Transcend and Axiom for the time being.
As with all of the other 128 GB kits, OWC's will run at 1066 MHz due to limitations in Intel's chipset for addressing the higher capacity of RAM. Lower-capacity RAM kits can run at faster 1866 MHz speeds, but OWC notes that the performance hit of the 128 GB kit is generally minor compared to the benefit of having much more RAM.
While current DRAM device technology limit 32GB modules to a 1066MHz memory clock in the Apple Mac Pro 2013, due to enhanced CAS Performance of OWC MaxRAM 32GB Modules, actual real-world performance is insignificant in low memory need scenarios while offering incredibly significant performance gains in all cases where application use benefits from greater than 64GB of total memory installed.In addition to its new kits of 32 GB modules, OWC also offers RAM kits for the Mac Pro using 8 GB and 16 GB modules at much lower pricing than through Apple. As a result, customers may prefer to order their Mac Pro from Apple with a minimum of RAM and save some money by upgrading the RAM through OWC or another vendor offering high-quality RAM for lower prices than at Apple.