Intel Core i5-3320M socket: Socket G2

What the Core i5-3320M is

Intel Core i5-3320M is a dual core Ivy Bridge mobile processor that Intel released in June 2012 for business and mainstream laptops. It runs at 2.6 GHz base with Turbo Boost 2.0 to 3.3 GHz, backed by 3 MB Intel Smart Cache and Hyper-Threading for 4 threads. The 22 nm process and 35 W rating made it the volume choice for 14 inch and 15 inch socketed designs that year.

Graphics are Intel HD Graphics 4000 at 650 MHz to 1200 MHz, the higher ceiling marking a step over the 3210M. The block drives three displays and adds Quick Sync for video conversion, which mattered to office laptops that encoded calls and captures. Business features include vPro, TXT and VT-d on supported boards, so fleets could manage the chip remotely.

The extra 100 MHz base and 200 MHz turbo over the 3210M show in short bursts and in sustained dual core work. Laptops pair it with two SODIMMs, a spinning drive or an early SSD, and HM77 or QM77 chipsets. The LGA, PGA and BGA: CPU package types explained guide explains the package difference that decides whether this chip can be serviced.

Socket and motherboard compatibility

The Core i5-3320M fits Socket G2 as an FCPGA988 part, and it also ships soldered on BGA 1023. Intel ordering data proves the twin: SR0MX in FC-PGA12F trays for the socketed form and SR0MY in FC-BGA12F trays for the soldered form. The spec page lists both sockets with sizes of 37.5 × 37.5 mm for the rPGA and 31.0 × 24.0 mm for the BGA. Check the lid code, since the two never interchange.

Compatible boards use mobile 7 series chipsets, most often HM76, HM77, QM77 and QS77. The BIOS must carry the exact 3320M string with Ivy Bridge microcode, and Sandy Bridge era boards need that firmware before the swap. Any 35 W Socket G2 thermal design covers the chip. The Socket vs chipset: what decides whether a CPU works guide explains why the maker CPU support list is the final check.

Memory, PCIe and cooling

Memory support is DDR3, DDR3L and DDR3-RS at 1333 or 1600 MT/s, two channels, up to 32 GB. Peak bandwidth of 25.6 GB/s arrives only with two matched modules, and the shared graphics block is the first to suffer on a single module. No ECC support exists on this SKU, so business error checking stays at the software level.

PCI Express is 3.0 with 16 CPU lanes, split by the board into 1x16, 2x8 or 1x8 plus 2x4. Laptops wire those lanes to optional discrete graphics, WLAN and storage, while the chipset handles USB 3.0 and SATA. The higher graphics ceiling of this SKU helps where no discrete GPU is fitted, since the internal panel and a projector both run from HD 4000.

Cooling is board specific for 35 W with a 105 C junction limit. A service that cleans the fan and renews paste often restores the full 3.3 GHz single core boost, because heat rather than power usually caps older laptops first. The socketed lid allows that service, while the BGA twin stays fixed to its board.

Upgrade paths

On Socket G2 the Core i5-3320M can step to Intel Core i5-3360M at 2.8 GHz to 3.5 GHz where the manual allows access and the BIOS lists that model. Both share the same 35 W envelope, cache and memory, so the heatsink and RAM carry over. A move down to an i3 M removes turbo and is rarely useful once a 3320M is fitted.

Beyond the socket the path is a new laptop. Later BGA platforms bring DDR4, NVMe and current wireless that Socket G2 cannot wire. The soldered twin on BGA 1023 is not a stepping stone, since soldered balls cannot be reworked outside the factory. Keep the old laptop for travel duty after a drive wipe.