Compatibility between Optane SSD and CPU / CPU and RAM frequency questions.

[Pasteur290]

Hi folk,

I got two problems just don't understand why.

1. The very important point of Optane SSD is the lowest latence ever in SSD. So the optimal set up should connect it with CPU PCIE controller directly. However display card is already took 16 PCIE lanes in nost of the PC (lastest i7 only have 16 PCIE lanes total). In this case the 905P has to connect chipset PCIE lane and that make higher latence compare with direct connection. Is there any solution for this? Or we can only wait until intel increase PCIE lanes on Gen.9 CPU?

2. Some RAM have very high frequency such as 4266MHz or 4666MHz, but the highest frequency supported by 8700k is just 2666MHz, what is the point of it?

Thank you for those answers.

 

[Campy]

1: Most motherboards with two PCIe x16 slots(physical size) will let you run them in x8/x8 mode electrically, splitting the bandwidth between them. Alternatively you can go with a HEDT platform which has more than 16 CPU lanes(X299 for Intel and X399 for AMD). One last option is AMD Ryzen with X370 or X470, because on this platform one of the M.2 slots goes directly to the CPU. For the last option you will need to get one of the small M.2 Optane drives, or one of the U.2 drives, which usually include an M.2 adapter cable.

2: Anything above 2666MHz is considered an overclock, but it can still work. However you should be very careful when considering memory with such high frequencies(especially 4000 and above), it is very difficult and in many cases impossible to get it running at it's rated speed. Something like 3200Mhz CL14 or 3600MHz CL16 is what I would recommend.