by Apple. The type of RAM modules that Apple supplies with the late-2013 Mac Pro in the default configuration are ECC (UDIMM) on the up to 8 GB modules (shown on each module as PC3-14900E). Apple offers as an optional upgrade 16 GB modules are ECC (RDIMM) modules (shown on each module as PC3-14900R). The higher-capacity 32 GB modules that some third-party vendors offer are also RDIMM. The UDIMM and RDIMM module types cannot be mixed. Apple publishes recommended configurations to use. Operating systems Apple's Boot Camp provides BIOS backwards compatibility, allowing dual and triple boot configurations. These operating systems are installable on Intel x64-based Apple computers: OS X Mavericks and later Windows 7, 8.1 and 10 64-bit (hardware drivers are included in Boot Camp) Linux via Linux installers (Boot Camp does not provide Linux support in the same way it does with Windows) Specifications Reception Reception of the new design was mixed, initially receiving positive reviews, but more negative in the long term, due to Apple's failure to upgrade the hardware specs. The performance had been widely lauded, especially handling video tasks on the dual GPU units, with some reviewers noting the ability to apply dozens of filters to realtime 4K resolution video in Final Cut Pro X. Drive performance, connected via PCIe, was also widely mentioned as a strong point. Technical reviewers praised the OpenCL API under which the machine's powerful twin GPUs and its multi-core CPU can be treated as a single pool of computing power. However, in late 2013 through early 2014, some reviewers had noted the lack of internal expandability, second CPU, serviceability, and questioned the then-limited offerings via Thunderbolt 2 ports. By 2016, reviewers started to agree that the Mac Pro was now lacking in functionality and power, it having not been updated since 2013, and it was past time for Apple to update it. Apple later revealed in 2017 that the thermal core design had limited the ability to upgrade the Mac Pro's GPUs and that a new design was under development, to be released sometime after 2017. Problems On February 5, 2016, Apple identified problems with FirePro D500 and D700 GPUs manufactured between February 8, 2015 and April 11, 2015. Issues included "distorted video, no video, system instability, freezing, restarts, shut downs, or may prevent system start up." Customers who owned a Mac Pro exhibiting those issues could take their affected machine