Intel Core i3-9000 socket: LGA 1151

What the Core i3-9000 is

The Core i3-9000 is a four core, four thread desktop processor with a fixed 3.7 GHz clock and no turbo step. It carries 6 MB of shared L3 cache and a 65 W TDP on the 14 nm process. The TechPowerUp database lists part number SR3XN with a September 1, 2018 release and Coffee Lake coding.

Intel documented the 9000 series in its 2018 microcode guidance as part of the 8th Gen wave, with 4 core plus 2 graphics configuration silicon. That places it beside the i3-8100 family rather than the later 9th Gen refresh. The fixed clock keeps behavior steady for office images where every machine must act the same.

Graphics need care on this SKU. TechPowerUp lists integrated graphics as not available, while an aggregator page lists UHD Graphics 630. With two sources in conflict and no Intel ARK page open to decide it, this page omits the graphics row and buyers should confirm display output with the seller or board maker before relying on it.

Socket and motherboard compatibility

The 9000 fits LGA 1151 revision 2 on 300 series motherboards such as H310, B360 and H370. Boards sold in late 2018 accept it with the shipping BIOS where the maker lists the part. The Socket vs chipset: what decides whether a CPU works guide explains the two revisions of this socket.

It does not fit 100 or 200 series boards, which are revision 1 for 6th and 7th Gen chips. The package drops into the same socket shape but will not start there. Check the chipset name on the board before buying used parts.

Office buyers should favor boards with the display outputs they need, since graphics on this SKU are uncertain. A cheap discrete card removes the question where the tower must drive multiple monitors. The Intel Core i3-9100 is a nearby alternative with confirmed UHD Graphics 630 on the same boards.

Memory, PCIe and cooling

Memory support is DDR4 in two channels at up to 2666 MT/s, with about 42.7 GB per sec of bandwidth. ECC is listed as not supported in the database entry, so office towers use standard desktop DIMMs. Two matched sticks give dual channel speed for office multitasking.

PCI Express arrives as version 3.0 with 16 lanes from the CPU for graphics and storage. A single NVMe drive and a graphics card fit the lane budget of a basic tower. Cooling uses the shared 75 mm LGA 1151 pattern at 65 W, so stock Intel coolers and common towers fit.

Upgrade paths

On the same socket the step up is a six core chip such as the Intel Core i5-8400 where threaded work matters, keeping the board and DDR4. The 9000 keeps its place where a fixed clock quad core covers office work at low cost. A used 300 series board with this chip makes a cheap fleet tower.

Moving past LGA 1151 to LGA 1200 needs a new board, since no 8th Gen chip fits the newer socket. Office fleets usually add memory or an SSD before replacing the processor.