Intel Core i5-8400T socket: LGA 1151
The Intel Core i5-8400T uses the LGA 1151 socket on revision 2 boards with 300 series chipsets. It is a low power six core desktop chip at 35 W.
- Socket
- LGA 1151 (revision 2)
- Launched
- April 2018
- Cores and threads
- 6 and 6
- Base power
- 35 W
- Codename
- Coffee Lake
- Segment
- Desktop
- Family
- Intel Core i5
- Clocks
- 1.7 / 3.3 GHz
Intel Core i5-8400T specifications
| Cores | 6 |
|---|---|
| Threads | 6 (no Hyper-Threading) |
| Core architecture | Coffee Lake cores on 14 nm |
| Clocks | 1.7 GHz base, up to 3.3 GHz with Turbo Boost 2.0 |
| Cache | 9 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 35 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4-2666, two channels, up to 128 GB |
| PCI Express | 16 lanes from the CPU, PCIe 3.0 |
| Integrated graphics | Intel UHD Graphics 630 (350 MHz to 1.05 GHz) |
| Multiplier | Locked |
| Package | FCLGA1151 (37.5 by 37.5 mm) |
Motherboard and chipset compatibility
Intel Core i5-8400T needs a motherboard with a LGA 1151 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 300 series: B365 and Z390 | Z390, B365 | Works out of the box |
| 300 series: H310, B360, H370, Q370, Z370 | Z370, H370, B360, H310, Q370 | Works out of the box |
| 200 series | Z270, H270, B250, Q270, Q250 | Not supported |
| 100 series | Z170, H170, B150, H110, Q170, Q150 | Not supported |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1151.
LGA 1151 at a glance
| Type | LGA, 1,151 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | August 2015 |
| Memory | DDR4 on most boards (some early boards use DDR3L). DDR4 only on the second revision |
| Cooler mounting holes | 75 × 75 mm |
What the Core i5-8400T is
The Core i5-8400T squeezes six Coffee Lake cores into a 35 W envelope. It launched in the second quarter of 2018 with a 1.7 GHz base and up to 3.3 GHz boost. Intel targets small towers that need six real cores with minimal heat.
Nine megabytes of Smart Cache support office multitasking across six threads. The low base stretches efficiency in compact cases. Boost to 3.3 GHz lifts single thread bursts for everyday apps.
UHD Graphics 630 from 350 MHz to 1050 MHz cover office displays. The process is 14 nm and the multiplier is locked. DDR4-2666 in two channels feeds the cores.
Socket and motherboard compatibility
The 8400T fits LGA 1151 on revision 2 boards only. H310 small towers pair it with DDR4 for quiet offices. Early Z370 may need an update. Revision 1 never supports it.
DDR4-2666 in two channels up to 128 GB covers six core offices. The Socket vs chipset: what decides whether a CPU works guide details revisions.
Single socket compact towers are the home. Another low power 300 series chip on the same board adds speed.
Memory, PCIe and cooling
DDR4-2666 in two channels up to 128 GB suits six core multitasking. Start with 16 GB where many tabs stay open.
Sixteen Gen3 lanes can hold NVMe while integrated graphics drive monitors. Most small towers skip discrete cards.
35 W low profile cooling from the CPU cooler compatibility by socket guide stays quiet.
Upgrade paths
On the same socket, the Intel Core i5-8500T raises clocks at the same 35 W for snappier response. The Intel Core i3-8100T drops to four cores for cheaper nodes. Both share 300 series boards.
Pentium parts lack cores for heavier multitasking.
Past LGA 1151 low power six core offices move to LGA 1200. The 8400T covers quiet six core towers.
Frequently asked questions
What socket does the Core i5-8400T use?
It uses LGA 1151 on revision 2 boards.
How many cores does the 8400T have?
Six cores without Hyper-Threading give six threads. Base is 1.7 GHz with boost to 3.3 GHz.
Which graphics does the 8400T include?
UHD Graphics 630 from 350 MHz to 1050 MHz.
What memory does the 8400T support?
DDR4-2666 in two channels up to 128 GB.
When did the 8400T launch?
April 2018.
Sources and verification
Facts last checked against these sources on . Page last edited on .