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The vast majority of Intel server chips of the Xeon E3, Xeon E5, and Xeon E7 product lines support VT-d. The first—and least powerful—Xeon to support VT-d was the E5502 launched Q1'09 with two cores at 1.86 GHz on a 45 nm process. [2]
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...
Two PCIe 2.0 x16, IOMMU. AM3+ socket support AMD 990FX chipset RD990 x16 + x16 or x8 quad x16 + x16 or x16 + x8 + x8 or x8 quad 19.6 Four PCIe 2.0 x16, IOMMU. AM3+ socket support Model Code name Released CPU support Fab (nm) HT (MHz) AMD-V (Hardware Virtualization) IGP CrossFire SLI TDP (W) Southbridge Features / Notes
SLI SATA ports RAID AMD StoreMI Excavator Zen Zen+ Zen 2 Zen 3; A300 Feb 2017: None ... X470 PCIe 2.0 ×8 Yes 2, 6, 6 8 218-0891008 A520 Aug 2020 [13] PCIe 3.0 ×6 No
The graphics address remapping table (GART), [1] also known as the graphics aperture remapping table, [2] or graphics translation table (GTT), [3] is an I/O memory management unit (IOMMU) used by Accelerated Graphics Port (AGP) and PCI Express (PCIe) graphics cards.
Memory-mapped I/O is preferred in IA-32 and x86-64 based architectures because the instructions that perform port-based I/O are limited to one register: EAX, AX, and AL are the only registers that data can be moved into or out of, and either a byte-sized immediate value in the instruction or a value in register DX determines which port is the source or destination port of the transfer.
this section has lots of incorrect information in it, for example GA-990FXA-UD3 completely supports IOMMU and ESXi works just fine with it my board isn't even a REV3.0 just a rev1.1. Yes i am doing IOMMU specific things, like USB/RAID PCI card pass through.
The nForce4 SLI x16 has similar features to the nForce4 SLI, except it now provides 16 PCI-Express lanes to both graphics cards in an SLI configuration (as opposed to only 8 lanes per graphics card with the original SLI chipset). This is the only version of the nForce4 for AMD processors that has a separate northbridge and southbridge.