AMD Ryzen 3000 CPU Overclock :- It has already been well founded that the Ryzen CPUs of AMD enjoy high frequency, low latency RAM modules. This is because the velocity of the system memory being used directly impacts the velocity of Infinity Fabric (IF), AMD’s high-speed interconnection between CPU core clusters, chiplets, GPU core (in the case of APUs) and memory.

According to AMD, optimum efficiency is achieved when the frequency of IF and DRAM is 1:1. For example, if you run 3200MHz DDR4 RAM, the DRAM frequency will be around 1600MHz (since DDR= Double Data Rate) and in turn, the IF frequency(FCLK) will also have to be 1600MHz. However, some consumers have noticed that most motherboard BIOSes fail to auto-alter the velocity of IF corresponding to the fixed frequency of DRAM and in turn decrease the efficiency gains. So if you want to obtain that extra performance juice, this little tweak in BIOS settings should be very useful.

Popular YouTuber JayzTwoCents lately observed the same problem in his 3900x video and achieved important output across all CPU-dependent workloads after implementing the modifications.

Memory Frequency is double of DRAM frequency, as explained earlier. So for the 1:1 ratio, FCLK has been set to half of the Memory frequency.
DOCP =ASUS’ AMD equivalent of Intel XMP.
DOCP Only = only Mem OC; DOCP + IF OC = Mem OC + FCLK OC

In the next few pictures, we look at efficiency improvements across a few apps between DOCP only and DOCP + IF OC only.

+0.7% vs +1.3%, ie, approx 2x additional gain.
+0.1% vs +1.3%, ie, 13x additional gain.
+7.8% vs +10%, ie, approx 28% additional gain.
Avg FPS 124 vs 135, ie, approx 9% additional gain.
Min FPS 98 vs 109, ie, approx 11.5% additional gain.

So, you got it there. Quite amazing considering that you get around 10 percent additional efficiency without even overclocking your CPU core.

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