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Intel Core i7-7740X desktop CPU silver heatspreader with gold contact pads

Intel

Intel Core i7-7740X X-Series desktop processor LGA 2066 112W

SKU CH-925M-BBWZM

Quad-core desktop CPU with eight threads, 4.3 GHz base and 4.5 GHz turbo, 8 MB L3 cache, dual-channel DDR4-2666 support, 16 PCIe 3.0 lanes, 112 W TDP, LGA 2066 socket

  • Product nameCore i7-7740X
  • CPU coresQuad-Core
  • CPU socketLGA 2066
  • Maximum turbo clock4.5 GHz
  • TDP rating112 W
  • Processor classDesktop
  • Unlocked multiplier enables manual overclocking headroom
  • Base clock 4.3 GHz with turbo up to 4.5 GHz for responsive performance
  • Four cores and eight threads handle multi-threaded workloads efficiently
  • DDR4-2666 dual-channel support delivers high memory bandwidth
  • 16 PCIe 3.0 lanes provide ample connectivity for GPUs and fast storage

Socket LGA 2066 quad-core

The Intel Core i7-7740X is a desktop processor built for the LGA 2066 platform. It delivers four cores and eight threads with a 4.3 GHz base clock and a 4.5 GHz max turbo frequency. The 14nm Kaby Lake X architecture supports DDR4-2666 memory in dual-channel mode. It targets enthusiasts who need high single-thread speed on an X299 chipset board.

Check motherboard and cooling

Verify that your motherboard uses the Intel X299 chipset and an LGA 2066 socket before ordering. The CPU has a 112W thermal design power and ships without a cooler or thermal paste, so a suitable aftermarket solution is required. Ensure the BIOS version supports Kaby Lake X processors. Only sixteen PCI Express 3.0 lanes are available from the chip itself.

Upgrade from quad-core mainstream

This processor replaces a mainstream four-core CPU when you need the X299 platform's quad-channel memory capability and additional connectivity. The jump is worthwhile if your workload benefits from higher clock speeds and the 8MB L3 cache on a 14nm design. It fits builds that prioritise frequency over core count within the 112W envelope.

How it compares

Measured against everything we stock in Desktop Processors, at today’s prices. Recalculated every night.

Price $191.99
Pricier than about 60% of the 494 comparable items (median $149.99).
Maximum turbo clock 4.5 GHz
Lower than about 60% of the 246 comparable items (median 4.7 GHz).
TDP rating 112 W
Higher than about 64% of the 320 comparable items (median 95 W).

New to this? Buying a processor with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameIntel
Product lineCore i7 X-Series
Model nameBX80677I77740X
Product nameCore i7-7740X
Performance
Working frequency4.3 GHz
Bus speed8 GT/s
Processor
CPU coresQuad-Core
CPU socketLGA 2066
Maximum turbo clock4.5 GHz
TDP rating112 W
Processor classDesktop
Processor codenameKaby Lake X
CPU threads8-Threads
Level 2 cache4 × 256 KB
Level 3 cache8 MB
Process node14 nm
Virtualization supportYes
Max PCIe lanes16
Memory
Supported memoryDDR4-2666
Channel configuration2
Ports & slots
PCIe generation3.0

Questions about this item

Does the Core i7-7740X come with a cooler or thermal paste in the box?

The processor is sold without a cooler or thermal paste; both must be purchased separately for installation.

Which memory speed should I pair with the Core i7-7740X?

The CPU officially supports DDR4-2666 in dual-channel mode; faster kits will run at this speed unless the motherboard and BIOS allow higher XMP profiles.

What does the 4.5 GHz max turbo frequency mean for everyday workloads?

The 4.5 GHz peak applies to single-thread bursts within the 112 W thermal envelope; sustained all-core speeds will settle lower depending on cooling and motherboard power limits.

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