![]() ![]() Meta Tip: Do you see something familiar? We are reusing the masthead image from our 4GHz CPU Battle from April 2018 when we tested 2nd-Gen Ryzen against Intel's 8th-gen Core CPUs. For real-world performance please refer to our Ryzen 9 3900X, 3700X and R5 3600 reviews. The Coffee Lake CPUs certainly have a clock speed advantage out of the box, but that doesn't necessarily make them the best choice. All configurations used the same G.Skill FlareX DDR4-3200 memory using the xtreme memory profile and the same MSI GTX 2080 Ti graphics card.Ī small disclaimer we like to add for this kind of article: we're testing purely for the science of it and this is not buying advice. The 3rd-gen Ryzen CPUs have been tested on the Gigabyte X570 Aorus Xtreme using the AGESA 1.0.0.3AB BIOS revision, 1st and 2nd-gen Ryzen have been tested on the Asus ROG Crosshair 7 Hero, and the Coffee Lake CPUs on the Gigabyte Z390 Aorus Ultra. All CPUs tested will have 8 cores active, but where the 3700X has them all in a single die, the 3900X spreads the cores across two dies (two 4-core chiplets). Then for the Ryzen 9 3900X we've disabled two cores in each chiplet, taking it from an 12-core part down to an 8-core part. Any type of boost technology has been disabled, meaning the cores cannot go past 4 GHz and all cores are clocked at 4 GHz. The first and most obvious step is to remove core frequency from the equation and to do this we've locked all CPU cores at 4 GHz. To see how much headway AMD's made here, we're going to neutralize as many variables as we can, while also keeping things as realistic as possible. Although AMD is still trailing when it comes to frequency, they appear to have closed in and possibly exceeded Intel's IPC performance with the third generation Ryzen update. Traditionally Intel Coffee Lake CPUs have offered high IPC coupled with a high operating frequency and that's the best combination for maximum performance. Basically you are paying a slight premium for the 3800X as it is a better binned 3700X.IPC stands for "instructions per cycle" and it can be a good indicator of a processor's architecture efficiency. Really they are both very good processors and you can't go wrong with either one. I personally won't push past 1.4V, so have never tried either with more voltage than that. The 3700X at max overclock 1.4V can usually come close to 4.4Ghz, however the 3800X can come close to 4.5ghz with the same voltage. Most 3800X can do 4.4Ghz at the same voltage due to better binning. Most of the 3700X I have dealt with can't overclock much past 4.3Ghz all core 1.3 - 1.34V (ie reasonable voltage for a 24/7 overclock). However if you are going to manually overclock your processor then there are gains to be made. If your going to just run stock with XFR doing the boosting for you and possibly use the auto overclock and / or PBO then there really isn't going to be much gained by going to the 3800X. I've dealt with several 3700X and 3800X builds, and honestly if your not going to be manually overclocking there really isn't a huge difference between the two. I know some RAM this isn't the case, I had a kit of Hynix A die that higher frequency and looser timings produced better results than lower frequency and tighter timings. Depending on your RAM you may actually get better performance by lowering frequency to 3600Mhz and running with tighter timings / sub-timings. I am running 3733Mhz CL14 tight sub-timings. I use a voltage offset so I'm not at a sustained high voltage when not under load.Īnother important thing is RAM. I do almost all my overclocking in bios so I just load profile 1 for my everyday overclock (4.4Ghz 1.3V) profile 2 for SMT enabled 4.475Ghz all core (can push 4 cores and 8 threads to 4.5Ghz with ryzen master) 1.406V and profile 3 SMT disabled 4.525Ghz all core 1.406V. At 4.5Ghz+ in single core execution these processors can rival the 9700K, 9900K and even the 9900KS (of course those processors when overclocked past 5Ghz will still hold the edge). It was my first single core optimizations I was trying and am still tinkering with it to see if I can manage a little better single core as programs like Adobe and most games aren't going to make much use out of more than 8 threads and do better with higher frequency. The biggest difference in scores is I am running 4.475Ghz all core for my multi core score and single thread score I disabled SMT and was running 4.525Ghz all core. Deciding between the 3700X and 3800X I took the risk that the better binning would make a difference, and with this processor it was worth the gamble. I had to make the move as I needed my computer up and running and had already promised my 2700X to someone else who needed it and just couldn't put it off any longer. I had a hard time getting a Ryzen 3000 processor because I really wanted the 3900X, but couldn't connect with one.
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