I want to replace my aging Core i9-9900K, mainly for 1440p gaming, and I have roughly £620 available. My current system uses a Gigabyte Z390 Aorus Master, 32GB of Corsair Vengeance LPX DDR4, and a Radeon RX 9070 XT.
One option is moving to AM5 with a Ryzen 5 9600X, a new motherboard, and 32GB of DDR5. The parts I'm considering come to about £620 total: roughly £165 for the CPU, £125 for the motherboard, and £330 for the memory.
The cheaper alternative is a Ryzen 7 5800X3D for around £309, keeping my existing DDR4 and buying a compatible motherboard. That would cost about £400, but I'm unsure whether it offers enough performance and whether choosing the older AM4 platform is a mistake for future upgrades.
I'm looking for the best performance per pound. If the gaming difference between these options is small, I'd prefer the cheaper build. I'm also open to other CPU, motherboard, or platform suggestions.
5 Answers
The 5800X3D is the simplest value upgrade if you want to reuse your 32GB of DDR4. It remains a very capable gaming CPU and should pair well with the 9070 XT at 1440p, where you’ll often be GPU-limited. You would be moving to AM4 rather than staying on your current motherboard, but the lower total cost makes it attractive.
Consider a Ryzen 5 7500F or 7600 instead of the 9600X. They’re usually much cheaper while still offering strong gaming performance, and the money saved can go toward a sensible B650 motherboard and 32GB of DDR5. That may give you most of the practical benefit of AM5 without spending the full £620.
For a genuinely longer upgrade path, AM5 is the better choice. The 9600X gives you a newer platform, DDR5 support, and access to future CPU upgrades. However, the cost premium may not translate into a huge difference in 1440p gaming right now, especially in GPU-heavy titles.
At 1440p, I wouldn’t overspend purely for future-proofing. If you mainly play GPU-bound games and want the best value today, the 5800X3D is likely enough. If you play high-refresh competitive games or CPU-heavy simulation titles, AM5 becomes more worthwhile.
Another route is a Core i5-14400F with a DDR4 motherboard, allowing you to keep your current memory. It can be a reasonable middle ground for mixed gaming and general use, although AM5 has the stronger upgrade path. I’d choose based on whether you value lower immediate cost or keeping the platform for several future CPU generations.
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