Intel Core i5-3330 socket: LGA 1155

What the Core i5-3330 is

Intel Core i5-3330 is a quad core Ivy Bridge desktop processor that Intel released in September 2012 as a value quad for LGA 1155. It runs at 3.0 GHz base with Turbo Boost 2.0 to 3.2 GHz, and it carries 6 MB Intel Smart Cache. Four cores give 4 threads with no Hyper-Threading. The 22 nm process holds rated power to 77 W, the standard desktop envelope of the generation.

Graphics are Intel HD Graphics 2500 at 650 MHz to 1050 MHz. The block supports three displays and Quick Sync video, which covers office monitors and media playback without a card. The on die controller talks to DDR3 at 1333 or 1600 MT/s in two channels, and the chip adds AVX, VT-x with EPT and VT-d for virtual machines.

The narrow 200 MHz turbo range marks it as a steady throughput part rather than a burst part. All core loads sit near 3.0 GHz, while single thread peaks touch 3.2 GHz. Boards pair it with H77 or B75, 8 GB to 16 GB of DDR3 and a SATA SSD. The How to find your CPU socket type guide shows how to confirm the socket before a board swap.

Socket and motherboard compatibility

The Core i5-3330 fits LGA 1155 with 1,155 lands in FCLGA1155 form. The natural match is the 7 series: Z77, Z75, H77, B75, Q77 and Q75 all boot Ivy Bridge with a shipping BIOS. Most 6 series boards with H61, H67, P67 or Z68 accept it after a BIOS update, while B65, Q65 and Q67 stay with Sandy Bridge. Intel lists H77, Z75 and Z77 among the compatible chipsets for this SKU.

Power delivery at 77 W is the reference point for LGA 1155 towers, so every desktop board covers it. The practical check is firmware: install the BIOS update with a Sandy Bridge chip where needed, then fit the Ivy Bridge part. The Socket vs chipset: what decides whether a CPU works guide explains the sequence, and Intel Core i7-2600K shows a Sandy Bridge part that shares the same socket.

Memory, PCIe and cooling

Memory support is DDR3-1333 and 1600, two channels, up to 32 GB for 25.6 GB/s. Two matched DIMMs reach that figure, and integrated graphics gain most from the pair. ECC is not supported, so long running server tasks belong on Xeon boards instead. DDR4 is not an option on this socket.

PCI Express is 16 lanes from the CPU at PCIe 3.0, arranged as 1x16, 2x8 or 1x8 plus 2x4 by the board. HD 2500 covers 2D office work, so many systems never add a card. Where a card is added, a 2012 era mainstream model matches the CPU class without leaving either side idle for long stretches.

Cooling uses the 77 W desktop pattern with a 67.4 C case limit. The boxed cooler handles stock clocks in a tower with normal airflow, while slim cases want attention to vent clearance. Mounting is 75 × 75 mm push pin, shared across several LGA generations.

Upgrade paths

Within LGA 1155 the Core i5-3330 can move to faster Ivy quads on the same board. Examples include Intel Core i3-3220 downward for a dual core comparison, or upward to higher clock i5 parts with the same 77 W envelope where the BIOS lists them. Memory, storage and the cooler usually carry over, which keeps the cost to the chip alone.

A platform change means leaving the socket for DDR4 based boards such as LGA 1200. That step needs a new board, new RAM and often a new cooler bracket. Keep the LGA 1155 system for office or lab duty where its four cores still cover the load.