Source: ===nForce 590 SLI
MCP=== • Enthusiast dual GPU segment, with full 16+16 SLI support. • Uses the C51XE
northbridge and MCP55XE
southbridge. The two chips provide a total of 46
PCI Express lanes.
nForce 570 SLI • Performance dual GPU segment. • Total of 28 PCI Express lanes.
nForce 570 LT SLI • Performance dual GPU segment. • Total of 20 PCI Express lanes.
nForce 570 Ultra • Performance single GPU segment, lacking SLI support. • Total of 20 PCI Express lanes.
nForce 560 SLI • Performance dual GPU segment, featuring only one Ethernet and four SATA ports. • Total of 20 PCI Express lanes.
nForce 560 • Mainstream single GPU segment, lacking SLI support, and featuring only one Ethernet and four SATA ports. • Total of 19 PCI Express lanes.
nForce 550 • Mainstream single GPU segment, lacking SLI and RAID 5 support, and featuring only one Ethernet and four SATA ports. • Total of 20 PCI Express lanes.
nForce 520 • Value/Mainstream single GPU segment, lacking SLI and RAID 5 support, and featuring only one 10/100 Ethernet and four SATA ports. • Total of 20 PCI Express lanes. • Uses MCP65S northbridge.
nForce 520 LE • Value single GPU segment, lacking SLI, RAID 0+1 and RAID 5 support, and featuring only one 10/100 Ethernet, 8USB ports two SATA ports. • Total of 20 PCI Express lanes.
nForce 500 SLI (nForce4 SLI AM2) • Performance dual GPU segment. • Total of 20 PCI Express lanes.
nForce 500 Ultra (nForce4 Ultra AM2) • Performance single GPU segment. • Total of 20 PCI Express lanes.
nForce 500 (nForce4 AM2) • Value single GPU segment. • Total of 20 PCI Express lanes. ==Chipsets for Intel processors==