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Square green desktop CPU with gold contact pads and silver heat spreader marked i5-8400T

Intel

Intel Core i5-8400T 1.7 GHz 6-core desktop processor

SKU CH-KYVB-GFQVK MPN i5-8400T

6-core desktop processor with 1.7 GHz base clock and 3.3 GHz turbo for LGA1151 sockets

  • 6 cores handle parallel workloads smoothly
  • Base clock 1.7 GHz keeps everyday tasks responsive
  • Max turbo 3.30 GHz lifts performance for short bursts
  • 9 MB L3 cache reduces memory latency
  • Socket LGA1151 fits compatible desktop motherboards

Desktop 6-core processor for low-power builds

The Intel Core i5-8400T is a six-core desktop CPU with a base frequency of 1.7 GHz and a maximum turbo of 3.30 GHz. It fits the LGA1151 socket and carries 1.5 MB of L2 cache plus 9 MB of L3 cache. The part number is SR3X6. This chip targets builders who need multi-threaded throughput in a compact or quiet system.

Thermal envelope rated at 24 W TDP

With a thermal design power of 24 W the processor runs cool under typical desktop workloads. Lower heat output allows smaller coolers and quieter fan curves in everyday use. The 1.7 GHz base clock keeps voltage modest during light tasks. Power draw stays close to the rated figure for common office and media applications.

Sustained load behaviour within 24 W limit

Under continuous multi-core work the CPU remains inside its 24 W envelope by adjusting frequency. Turbo boost reaches 3.30 GHz only when thermal headroom exists. Long renders or compiles will settle at lower clocks to maintain the power target. Buyers who need higher sustained frequencies should consider a higher-TDP alternative.

How it compares

Measured against everything we stock in Cable Locks & Laptop Extras, at today’s prices. Recalculated every night.

Price $66.99
Pricier than about 85% of the 8,241 comparable items (median $16.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I seat the i5-8400T into an LGA1151 socket without bending pins?

Align the gold triangle on the processor with the socket corner marker, lower it straight down without pressure, then close the retention lever until it clicks — forcing the chip sideways is the step that damages contacts.

Will the stock cooler need fresh thermal paste after a few years of 1.7 GHz base operation?

Yes — the factory paste dries out over time; plan to clean the old compound and apply a pea-sized drop of new paste whenever you reseat the cooler or notice rising core temperatures.

What stops the 3.30 GHz max turbo from holding indefinitely on all six cores?

The silicon hits its thermal ceiling first; once the package temperature reaches the internal throttle point the multiplier drops back toward the 1.70 GHz base clock to stay within safe limits.

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