5820k cannot alter the CPU ratio or BCLK settings.
5820k cannot alter the CPU ratio or BCLK settings.
I believe it's worth checking if the RAM at 3000MHz with speeds like 14-15-15-34 is affecting your CPU's maximum overclock potential. Many people have mentioned that using 5820k RAM above certain speeds can cause stress on the CPU, which might limit its ability to reach higher OC levels. I haven't seen anyone with their speed and this RAM actually hitting 4.5GHz, which isn't helpful either. On the other hand, there are users who successfully get 4.6GHz with 5820k paired with 2133/2444MHz RAM. For my requirements, a faster RAM like 4375MHz offers a better compromise compared to 2444MHz with a 4.5GHz OC. The high bandwidth of 4K video recording is impressive, and I noticed significant gains from reducing CPU timings by just 1 or 375Mhz, achieving around 10-12 FPS during 4K recording.
Some users often prioritize boosting CPU performance at the expense of RAM speed, yet it's possible to balance both. Focus on minimizing stress on the CPU by adjusting certain secondary timing parameters. I recommend applying the XMP profile for RAM once you've reached your target overclock. After that, we can proceed with optimizing your memory settings.
AIDA64 5820K @4375MHz
Dual DDR4-3000 16GB 14-16-16-34 CR2
Memory Read Speed: 42566 MB/s
Memory Write Speed: 23962 MB/s
Memory Copy Speed: 35463 MB/s
Memory Latency: 62.4ns
CPU Performance: 76916
CPU AES: 29792 MB/s
CPU Hash: 6712 MB/s
CPU ZLIB: 561.8 MB/s
CPU PHOTOWORXX: 18807 MPixel/s
I finally understood a few things.
I was able to reach my CPU Cache at 3500MHz and pass stress tests.
I discovered that my RAM at 3000MHz with a 5820K cannot be changed beyond 125BCLK—it's just a limitation that applies to all RAM and MOBOS models.
That’s the situation.
My system remains stable at:
CPU 4375GHz @1.270v vcore 35x multiplier 125BCLK
CPU Cache 3500MHz voltages remain on auto
LLC set to lv3 but I might be fine with lv5 and lv1
RAM 3000MHz 14-15-15-34 2T @1.35v
I just wish my memory read/write/copy performance was more consistent compared to other overclockers.
AIDA64 shows me READ 44GB/s WRITE 24GB/s COPY 36GB/s LATENCY 61.2ns—this is the best I can get.
I lowered timings to 13-14-14-33 but failed Memtest86+; I don’t mind tweaking a bit more for the extra 2MB/s gain in overall tasks.
Let me know if this looks okay. I checked various 5820K overclock benchmarks online, but they’re hard to find.
I’m planning to run 3DMark today to see how it performs.