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The new GPU's for the new Mac Pro are:
NVIDIA GeForce GT 120 512MB
ATI Radeon HD 4870 512MB
Excuse me, but I thought the Nehalem Xeons were supposed to be Hyperthreading-capable and technically be 8-cores per chip, granted four of those cores being virtual. Is that not the case with these?
Yep, from Apple's site:
The virtue of virtual cores.
The new Intel Xeon “Nehalem” processors support Hyper-Threading, which allows two threads to run simultaneously on each core. So an 8-core Mac Pro presents 16 virtual cores that are recognized by Mac OS X. Performance is enhanced because Hyper-Threading enables the processor to take better advantage of the execution resources available in each core.
Also, keep in mind that the ATI 4870 takes up 2 PCIe slots.
PCI Express expansion:
One PCI Express 2.0 x16 slot
Two PCI Express 2.0 x4 slots
NVIDIA GeForce GT 120 with 512MB of GDDR3 memory, PCI Express 2.0, one Mini DisplayPort, and one dual-link DVI port
ATI Radeon HD 4870 with 512MB of GDDR5 memory, PCI Express 2.0, one Mini DisplayPort, and one dual-link DVI port
Multiple graphics card configurations available with two, three, or four NVIDIA GeForce GT 120 cards
Yes, but the spacing for the primary graphics slot is double-wide, so it doesn't cover any other slots.