Intel Celeron G1620T socket: LGA 1155

What the Celeron G1620T is

Intel Celeron G1620T is a dual core Ivy Bridge desktop part that Intel released in September 2013 for office desktops and small systems. It uses the Ivy Bridge core design on a 22 nm process, running at 2.4 GHz with no turbo. The cache is 2 MB Intel Smart Cache (L3). Power is 35 W. Graphics come from Intel HD Graphics (650 MHz to 1050 MHz).

The two cores have no Hyper-Threading, so threads equal cores at 2. Each core keeps its own floating point unit, which keeps single thread behavior predictable across office apps. The GT1 graphics block covers monitors and video without a separate card. The chip integrates the dual channel memory controller with ECC support and PCIe lanes on die.

At 35 W the Celeron G1620T belongs to the low power T group for small cases. The fixed 2.4 GHz clock suits file, print, point of sale and classroom duty with stock cooling. Boards pair it with DDR3 DIMMs and SATA SSDs. The How to find your CPU socket type guide shows how to confirm the socket before ordering parts.

Socket and motherboard compatibility

The Celeron G1620T fits LGA 1155 in LGA form with 1,155 lands. The chipsets built for the socket are the 6 and 7 series: H61, B75, Q75, Q77, H77 and Z77. Any of them boots Ivy Bridge with a shipping BIOS. Server boards with C202 and C204 add ECC UDIMM validation where needed.

Power delivery at 35 W is modest for LGA 1155, so all desktop power designs cover it. Memory support decides more builds than power: the board manual lists qualified DIMM speeds. The CPU cooler compatibility by socket guide explains Intel LGA mounting patterns. Socket vs chipset: what decides whether a CPU works covers Intel pairing rules.

Memory, PCIe and cooling

Memory support is ddr3-1333, two channels, up to 32 gb, ecc. ECC UDIMMs are the server and embedded choice, since they catch single bit errors in long running tasks. Two matched modules give the rated bandwidth. There is no DDR4 option, so a move to DDR4 means leaving the socket.

PCI Express is 16 lanes from the cpu, pcie 3.0 from the CPU for graphics and fast storage, plus chipset lanes for the rest. Most builds in this class stay on integrated graphics, since Intel HD Graphics covers office work and video. A low profile card of the era pairs without waste where a slot is free.

Cooling follows the 35 W rating. A low profile cooler with a quiet fan suits the 35 W envelope in slim cases. Intel LGA coolers mount with push pins on 75 by 75 mm spacing. Check height clearance in slim cases.

Upgrade paths

Within LGA 1155 the Celeron G1620T sits in the dual core Celeron and Pentium group. A same socket move can add clocks or cache, for example from a Celeron to a Pentium, or to a Core i3 with Hyper-Threading. The board stays, while memory and cooler often carry over.

A bigger move means a new socket with DDR4. Intel moved mainstream desktops through LGA 1200 with different pin layouts and cooler spacing. That move needs a new board, new memory and often a new cooler bracket. Keep the LGA 1155 board for secondary duty where it still runs well.