Intel BX80547RE3066C Celeron D 345J 3.06GHz CPU — main product image

Intel BX80547RE3066C Celeron D 345J 3.06GHz CPU

Intel

Intel BX80547RE3066C Celeron D 345J 3.06GHz CPU

Name: Intel BX80547RE3066C Celeron D 345J 3.06GHz CPU
Brand: Intel
SKU: BX80547RE3066C

A 3.06GHz LGA 775 Celeron D that keeps legacy single-threaded workloads and older systems running without breaking the budget.

$119.74*

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Intel Celeron D 345J is a single-core desktop processor built on Intel's Prescott microarchitecture and clocked at 3.06GHz on a 533MHz front-side bus. The raw clock number is the most favorable thing on its spec sheet — in 2004, 3GHz represented genuine compute throughput for office productivity and web browsing. The absence of hyper-threading, the single execution core, and the 533MHz FSB all constrain memory bandwidth and parallel throughput to levels that modern operating systems and browsers consume in background tasks alone. The 32-bit execution model is the harder wall: no 64-bit OS support means the software ecosystem accessible to this CPU has been effectively frozen for over a decade.

Where the 345J still has legitimate application is in maintaining or repairing aging LGA 775 systems — industrial controllers, POS terminals, legacy kiosk hardware, or HTPC builds running fixed software stacks on Windows XP or minimal Linux distributions. The boxed kit includes the heatsink and fan, which reduces sourcing friction when replacing a failed CPU in a system where pulling the whole unit isn't practical. For anyone building new, this processor is irrelevant. For anyone keeping a specific older machine operational, it fills the gap cleanly.

Key Features

Intel Celeron D C345J 3.0 CPU Kit SL7TQ BX80547RE3066C

*** Comes with Heatsink and Fan in Kit ***

Specifications

Processor Model

Celeron D 345J

Base Clock Speed

3.06GHz

Included Components

Heatsink, Fan

Product Code

BX80547RE3066C

Stepping Code

SL7TQ

Pros & Cons

👍 Pros

3.06GHz clock speed provides adequate single-threaded throughput for legacy applications, POS systems, and thin-client workloads where the software stack is frozen to an older era.
Ships as a boxed kit with heatsink and fan included, reducing the total cost and compatibility risk of sourcing a separate cooler for LGA 775.
LGA 775 socket uses a land grid array on the motherboard side, making physical installation straightforward without the pin-bending risk of older socket types.

👎 Cons

Single-core, no hyper-threading — any modern multithreaded workload or operating system will immediately saturate this processor, making it unsuitable for any current-generation software stack.
73W TDP is high relative to its compute throughput, generating significant heat for a single-core processor and increasing system power consumption disproportionately.
No support for x86-64 instructions in the Celeron D 345J means it cannot run 64-bit operating systems, locking users into 32-bit software environments with 4GB RAM ceiling.
FSB of 533MHz creates a memory bandwidth bottleneck that limits performance even in tasks the core itself could handle faster.
The Prescott microarchitecture has long been out of production, making this a legacy component with no upgrade path on the same socket beyond Pentium 4 or Core 2-generation CPUs.

Frequently Asked Questions

What socket does the Celeron D 345J use, and which motherboards are compatible?

The 345J uses the LGA 775 socket (Socket T). It is compatible with motherboards using Intel's 915, 945, and 865/875 chipsets that support Prescott-core Celeron D CPUs. Always verify the motherboard's CPU support list before installing, as BIOS revision requirements vary by board.

Does this CPU support hyper-threading or multiple cores?

No. The Celeron D 345J is a single-core, single-thread processor based on the Prescott architecture. It does not support Intel Hyper-Threading Technology. For any workload that benefits from parallelism, this CPU will be a hard ceiling.

What is the TDP, and is the included heatsink and fan sufficient for sustained loads?

The Celeron D 345J has a TDP of 73W, which is substantial for a single-core processor. The included boxed heatsink and fan are rated for this TDP under standard operating conditions. For small or poorly ventilated cases, monitoring CPU temperature under sustained load is advisable.

Can this processor run Windows 10 or 11?

Windows 10 32-bit can technically run on this hardware given sufficient RAM and compatible components, though performance will be marginal. Windows 11 is not supported — it requires a minimum of a dual-core processor and TPM 2.0, neither of which the 345J provides. This CPU is best paired with Windows XP, Windows 7, or a lightweight Linux distribution.

What real-world performance difference exists between the 345J and a Celeron D 346?

The 346 runs at 3.06GHz on a 533MHz FSB versus the 345J's 533MHz FSB at the same clock, making them effectively identical in practical use. The "J" suffix on the 345J denotes the Prescott-based D0 stepping. Performance delta between adjacent Celeron D steppings is negligible in real-world tasks.