About of lga 775 scoket

LGA 775 scoket:-

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 (CPU).

Chipsets:-

Pentium 4 chipsets:-

i845GV/GE/i848P/i865G/GV/P/PE/i910GL/i915G/GL/GV/P/PL/i925X/XE/

Core 2 chipsets:-

Lakeport: 945PL /945P / 945G / 945GC / 945GZ / 955X / 946PL / 946GZ P

Broadwater: i955X / i946 / 946GZ / PL / 965 / i975 / Q965 / P965 / G965 / Q963 / i975X

Bearlake: X35 / P35 / Q35 / G35 / P33 / G33 / Q33 / P31 / G31 / X38

Eaglelake: X48 / P45 / P43 / G45 / G43 / G41 / B43 / Q43 / Q45 /p41

SiS:-

SiS 649/649FX/655/656/656FX/662/671/671FX/671DX/672

VIA:-

PT800/PM800/PT880/PM880/P4M800/P4M800 Pro/PT880 Pro/PT880 Ultra/PT894/PT894 Pro/P4M890/PT890/P4M900

ATI:-

ATI Radeon Xpress 200; ATI Radeon Xpress 1250, ATI CrossFire Xpress 3200

Nvidia:-

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 (its final product was MCP7A family, marketed as GeForce 9300/9400, launched in October 2008), 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 launched first APUs in 2011 (Socket AM3+ processors, also first launched in 2011, were usually paired with AMD chipsets, but some motherboards using third-party chipsets were also manufactured, usually with Nvidia chipsets, as Socket AM3+ design directly derived from earlier Socket AM3 design).

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.

Location                                    Dynamic                                                      Static

IHS Surface                  756 N (170 lbf) (77 kp)                                311 N (70 lbf) (31 kp)

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 (Intel 915 and below) tend to support only single core Netburst Pentium 4 and Celeron CPUs at an FSB of 533/800 MT/s. Intermediate chipsets (e.g. Intel 945) commonly support both single core Pentium 4-based CPUs as well as dual core Pentium D processors. Some 945 chipset-based motherboards could be given a BIOS upgrade to support 65nm Core-based CPUs. For other chipsets, it also varies, as LGA 775 CPU support is a complicated mixture of chipset capability, voltage regulator limitations and BIOS support. For example G41 chipset doesn't support NetBurst CPUs such as Pentium D, Pentium Extreme Edition, Pentium 4 and Celeron D.