AMD Ryzen 7 5800X CPU Review

AMD’s Zen 3 Ryzen 9 chips – 12-core 5900X and 16-core 5950X – have proven to be a winner in their respective market segments. But selling for £520 and £750 respectively, lower cost options are needed to appeal to the mass market. Is the £420 Ryzen 7 5800X 8-core the option users have been looking for? Or has AMD increased the price compared to its Zen 2 predecessors a lot?

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The AMD Ryzen 7 5800X It is an octa-core 16-thread processor running at a base frequency of 3.8 GHz and max 4.7 GHz with a 105W TDP. The MSRP is set at $449 but comes in at £420 in the UK. That’s a $50 increase in MSRP over the Zen 2 Ryzen 7 3800X/3800XT it replaces.

What’s even more challenging, however, is the often up-to-date £90 for a 105W TDP 8-core Zen 2, or an additional £120-130 for a Ryzen 7 3700X.

AMD’s chosen processing node is still the TSMC 7nm, but that’s the modified design logic as implemented with the frequency-optimized Ryzen 3000XT chips launched in July 2020. This should help reach and maintain higher boost clocks versus Zen 2 chips. The original Ryzen 3000X.

Not surprisingly, the Ryzen 7 5800X uses the same Zen 3 architecture as the Ryzen 9 5900X and Ryzen 9 5950X. For more details on the architecture and differences between Zen 3 versus Zen 2, check out our main Ryzen 9 5000 series launch reviews here and here.

Simply put, the Ryzen 7 5800X now uses an eight-core Zen 3 CCX for its single core CCD chip. You still get the same 12nm IO die as the other Zen 3 and Zen 2 processors. Using a single, fully packed eight-core chip means the Ryzen 7 part gets 32MB of L3 cache to go along with 4MB of L2 cache across the core count.

This is a 32MB reduction in L3 cache from the dual Ryzen 2 CCD chips which is the same amount as the cheaper Ryzen 5 5600X single CCD.

Simply put, it’s as if AMD has priced the Ryzen 7 5800X on the premise that it ‘steals’ the full-value eight-core chips away from the more expensive Ryzen 9 5950X or Zen 3 EPYC processors. As such, the Ryzen 7 5800X appears to be priced as an oversold for the Ryzen 9 5900X which costs £90 or 21% more in the UK but offers 50% more cores and 100% cache.

Pricing the £420 octa-core Zen 3 chip in the UK also puts Intel’s Comet Lake rivals on hold. AMD will fight against the 16-thread Core i7-10700K for the title of ‘fastest octa-core desktop processor’, but the Ryzen chip will do so with the price disadvantage of £50 against the £370 Core i7.

More important, however, is the competition created by the £440 Intel Core i9-10850K, which is basically just a slower 100MHz Core i9-10900K processor but much cheaper. Comet Lake’s 10-core, 20-thread chip will have an edge frequency against the Ryzen 7 5800X and 25% more cores, but AMD will battle it out with its superior Zen 3 architecture and stronger AM4 platform capabilities.

fighting between Ryzen 7 5800X And a competitor to the roughly priced Core i9 10-core will be especially interesting, so let’s move on to the test.

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