Apple's Mac Pro - Upgrading CPUs, Memory & Running XP

Final Words

As a computer running OS X, the Mac Pro is the best you can get, but even as a PC the Mac Pro is extremely competitive. For most tasks under Windows XP, the Mac Pro performs much like a similarly clocked Core 2 processor despite having a faster FSB and more cores. If you're running applications that are particularly well threaded, then a four core Mac Pro will obviously have an advantage over a single socket dual core system under any OS. It's particularly in latency sensitive applications such as audio/video encoding and 3D games that the Mac Pro's FB-DIMM memory subsystem really holds it back.

For gaming, before we can even begin to complain about performance, there's the issue of not being able to use cheaper and more readily available PC video cards in the Mac Pro (yet). If you're looking to the Mac Pro as the perfect hybrid OS X/gaming PC, you're either going to have to configure it with a Quadro FX 4500 or an X1900 XT, or wait for the first PC video card hacks to become available for this machine to be a real gaming PC. If and when the latter does happen, the Mac Pro truly could solve the age old problem of not being able to both work and play on your Mac. The FB-DIMM performance penalty in games is noticeable, but with a fast enough GPU it will still be a more cost effective option than buying a Mac Pro and a high end PC for gaming.

If you're not particularly interested in gaming, then the Mac Pro in its base configuration is ready to go and be one of the fastest desktop PCs money can buy. The impact of its FB-DIMMs is much lower in the majority of non encoding/gaming applications we ran, which means that for the handful of applications you need to run in XP the Mac Pro will perform just fine. While our hearts still yearn for a Core 2 based Mac, the Mac Pro will suffice as a good performer regardless of OS and application.

It is still worth noting that if Apple were to release a Core 2 (Conroe/Kentsfield) based Mac similar to the Mac Pro, it could end up outperforming the Mac Pro by being able to use regular DDR2 memory. The Intel 5000X chipset and its FB-DIMM memory are really designed for multi-user server and high end workstation workloads, where large amounts of simultaneous reads/writes are able to mask much of the latency penalty of FB-DIMMs. The problem is that the Mac Pro is the only high end desktop Apple offers without an integrated display, so inevitably it's going to attract a lot of users whose usage models aren't best serviced by the Intel 5000X chipset.

The upgrade path offered by the Mac Pro is particularly interesting, not because Macs weren't upgradable in the past (since they were) but because upgrades have never been so readily available. And based on our initial testing, it's looking like you'll be able to drop in a pair of Clovertowns and make the move from four to eight cores in the Mac Pro by the year's end. The combination of excellent OS X performance, good Windows XP performance and a more interesting CPU upgrade path than any prior Mac makes the Mac Pro particularly interesting. While many were worried that Apple's move to Intel would make the Mac more generic, it has simply made the Mac Pro more versatile and desirable.