LGA 775, also known as Socket T, is an Intel desktop CPU socket. LGA stands for Land Grid Array. Unlike earlier common CPU sockets, such as its predecessor Socket 478, the LGA 775 has no socket holes; instead, it has 775 protruding pins which touch contact points on the underside of the processor. The socket had an unusually long life span, lasting 7 years until the last processors supporting it ceased production in 2011. The socket was superseded by the LGA 1156 and LGA 1366 sockets.
For LGA 775, the distance between the screw-holes for the heatsink is 72 mm. Such heat-sinks are not interchangeable with heatsinks for sockets that have a distance of 75 mm, such as LGA 1156, 1155, 1150, 1151.
PT800 / PM800 / PT880 / PM880 / P4M800 / P4M800 Pro / PT880 Pro / PT880 Ultra / PT894 / PT894 Pro / P4M890 / PT890 / P4M900 PT880 Pro also supports AGP and PCI-Express at the same time, but only one port can be used at a time.
nForce4 Ultra; nForce4 SLI XE; nForce4 SLI; nForce4 SLI X16; nForce 570 SLI; nForce 590 SLI; nForce 610i; nForce 630i; nForce 650i Ultra; nForce 650i SLI; nForce 680i LT SLI; nForce 680i SLI; nForce 730i; nForce 740i SLI; nForce 750i SLI; nForce 760i SLI; nForce 780i SLI; nForce 790i SLI; GeForce 9300; GeForce 9400 Sources: LGA 775 was the last Intel socket for desktops, for which third-party companies manufactured chipsets. Nvidia was the last third-party manufacturer of LGA 775 chipsets, as other third-parties discontinued their products earlier. All chipsets for superseding sockets were exclusively designed and manufactured by Intel, a practice later also adopted by AMD when they first launched APUs in 2011.
The force from the load plate ensures that the processor is completely level, giving the CPU's upper surface optimal contact with the heat sink or cold-water block fixed onto the top of the CPU to carry away the heat generated by the CPU. This socket also introduces a new method of connecting the heat dissipation interface to the chip surface and motherboard. With LGA 775, the heat dissipation interface is connected directly to the motherboard on four points, compared with the two connections of the Socket 370 and the "clamshell" four-point connection of the Socket 478. This was done to avoid the reputed danger of the heat sinks/fans of pre-built computers falling off in transit. LGA 775 was announced to have better heat dissipation properties than the Socket 478 it was designed to replace, but the Prescott core CPUs ran much hotter than the previous Northwood-core Pentium 4 CPUs, and this initially neutralized the benefits of better heat transfer. However, modern Core 2 processors run at much lower temperatures than the Prescott CPUs they replaced. Processors with lower TDP and clock speeds only used Thermal Interface Compound in between the die and the integrated heat spreader, while processors with higher TDP and clock speeds wave the die soldered directly to the IHS, allowing for better heat transfer between the CPU and the integrated heat spreader.
LGA 775 Mechanical load limits
All LGA 775 processors have the following mechanical maximum load limits which should not be exceeded during heat sink assembly, shipping conditions, or standard use. Load above those limits could crack the processor die and make it unusable.
The transition to the LGA packaging has lowered those load limits, which are smaller than the load limits of Socket 478 processors but they are bigger than Socket 370, Socket 423 and Socket A processors, which were fragile. They are large enough to ensure that processors will not crack.
LGA 775 compatibility
Compatibility is quite variable, as earlier chipsets tend to support only single core NetBurst Pentium 4 and Celeron CPUs at an FSB of 533/800 MT/s. Intermediate chipsets commonly support both single core Pentium 4-based CPUs as well as dual core Pentium D processors. Some motherboards using the 945 chipset could be given a BIOS upgrade to support 65nm Core-based processors. Other chipsets have varying levels of CPU support, generally following the release of contemporary CPUs, as LGA 775 CPU support is a complicated mixture of chipset capability, voltage regulator limitations and BIOS support. For example, the newer Q45 chipset does not support NetBurst-based CPUs such as the Pentium 4, Pentium D, Pentium Extreme Edition, and Celeron D.
Virtualization Capabilities
Core 2 and other LGA 775 processors are capable of doing Virtualization but only requires using VMware Workstation 12 and it is not compatible with new versions of VMware Workstation. This was because of Intel VT-x with EPT or simply known as SLAT lacks on the processors. Intel's VT-x with EPT was introduced on the newer, Nehalem micro-architecture. To check if you processor is capable for VM, Recommended Requirements for VM
4 GB+ of Video RAM is only necessary if running multiple instance of VMs
2 GB of RAM or higher
A Motherboard and BIOS that supports Intel VT-x
Sample Specs ECS G31T-M7 Rev.1 or Rev.7 Motherboard GeForce GT 520 4GB DDR2-800Mhz Core 2 Duo E8400 SSD - Windows 10 Pro Important : Using Single Core for a Pentium 4 or a Virtual Machine might not deliver full performance.
