AMD Athlon II X4 645 Processor (ADX645WFGMBOX)

Name: AMD Athlon II X4 645 Processor (ADX645WFGMBOX)
Brand: Unbranded
SKU: B003YV0F66

Bottom line: The AMD Athlon II X4 645 Processor is a specs-and-price decision rather than a crowd-consensus one in the retro cpus category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-05

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ 2MB Cache

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

Product DescriptionAMD Athlon II X4 645, 95W, AM3, 2MB Cache, 3100MHz.From the ManufacturerAMD Athlon II X4 645, 95W, AM3, 2MB Cache, 3100MHz

SpecPicks Verdict

SpecPicks scored AMD Athlon II X4 645 Processor using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpus category. Compare with similarly-priced alternatives in the retro cpus category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro cpus of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

3.1 ghz
2MB Cache

Full Specifications

Brand	AMD
Wattage	95 watts
CPU Model	Athlon
CPU Speed	3.1 GHz
CPU Socket	Socket AM3
Model Number	ADX645WFGMBOX
Mfr Part Number	ADX645WFGMBOX
Number of Items	1
Processor Brand	AMD
Processor Count	4
Processor Speed	3.1 GHz
Secondary Cache	2 MB
CPU Manufacturer	AMD
Item Part Number	ADX645WFGMBOX
Processor Series	Athlon
Processor Socket	Socket AM3
Processor Core Count	4
Warranty Description	Manufacturer Limited Warranty period: 3 years
Cache Memory Installed Size	2
Processor Number of Concurrent Threads	4

Ready to buy?

AMD Athlon II X4 645 Processor (ADX645WFGMBOX) is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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