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The AMD Ryzen 9 9900X3D is a desktop processor with 12 cores, a 4.4 GHz base clock, a boost clock up to 5.5 GHz, built for the AM5 socket.
Its rated TDP is 120 W, which is the number to size your cooler and power supply around — bear in mind that sustained real-world draw commonly exceeds the nominal figure.
The first checkpoint is the motherboard: it has to use the AM5 socket, and a matching socket alone is not always enough — the chipset also has to support the processor's generation, which sometimes comes down to a BIOS update.
Memory comes next, and it is dictated by the motherboard rather than the CPU. Then cooling, which should be sized against the 120 W TDP with margin rather than matched exactly.
Finally, balance against the graphics card: a processor substantially faster than the GPU returns nothing in games, while the reverse caps your frame rate no matter which card is fitted.
We track 5 listings for the AMD Ryzen 9 9900X3D across the Tunisian retailers on VarCraft. Across those listings the price runs from 2 069 TND to 2 450 TND. That gap is normal in the Tunisian market: retailers import in different batches, at different exchange rates, and rarely adjust old stock downward when a cheaper batch lands elsewhere. It is also the single easiest saving to capture, because it costs you nothing but the few seconds it takes to compare. All tracked listings are currently showing in stock.
Prices come from the retailers' own published listings and are refreshed regularly, but they are a snapshot rather than a live feed. Flash sales, in-store-only pricing and stock that sells out between refreshes all happen. Always confirm the final price on the retailer's own page before you commit — every offer above links straight to it.