I build PCs so am fairly well acquainted with computer hardware, and my mate has asked me to put together a new PC for him. Usually I would recommend an i3-8350K or an i5. Obviously sim racing is CPU intensive, and an i7 is preferable, but expensive. Having long been an Intel fanboy, with the rise of Ryzen I am thinking it is time to at least test the waters with AMD and a Ryzen 7 1800X/2700X? The alternative for the budget is an i7-5930K used. Any users currently on Ryzen that could give me some feedback of their experience?
Ryzen 2 are great CPUs but they are lacking single thread performance. Sadly all current Sims run at 1-3 threads maximum so it's all about single thread performance!
However more real cores do help the single thread performance a little so the ryzen and the i3 would probably be the same fps but the ryzen is a lot better for anything else than pure sim racing.
I5 with a k would probably be the best bang for the buck!
I don't really know how high that used i7 would clock but MHz = single thread boost so a 5 GHz i3 is better for sim racing than a 4 GHz i9! More cores do help but while the i3 will have decent fps at 80% overall load before it gets stuck in the single thread limit, an i9 will get stuck at only 20% overall load.
Currently the performance is:
1. I7 9700k due to 8 real cores and very high clock speeds!
2. I9 9900k with not so high clock speeds due to heat
3. I5 9600k and i7 8700k, hyper threading equals the better per-clock-performance
4. I5 8600k
5. I3 and ryzen 2700x. The ryzen has lots of cores + "hyperthreading" which makes it quite fast whereas the i3 has a really good single thread performance but the moment it needs to multi task it will become very slow in comparison.
My recommendation would be the 9600k or 8600k or wait for ryzen 3. If it's for simracing! Would be good for quite a few years! The cheaper CPUs or not so highly clocked CPUs or ryzen 1/2 would be only good for now but not future proof...
My 2 cents