ddr4 corsair vengeance vs g.skill tridentz

[Ryunosei]

Hello, this is my build:

CPU: Intel i5-8400 (stock cooler) (says it supports up to 2666mhz ddr4)
MoBo: Asus Tuf z370 Pro Gaming (supports up to 4000mhz ddr4)
GPU: GTX 1060 Aorus 6gb Xtreme Edition rev2
PSU: Xfx XTR 650w
HD: WD Blue 1tb
SSD: Intel 545s M.2

These are the options for RAM right now (all 2x8gb):
Corsair Vengeance LPX Black 3000Mhz
Corsair Vengeance RGB 3000Mhz
T-Force DELTA RGB White 2666Mhz
T-Force Night Hawk RGB Red 3000Mhz
G.Skill TridentZ RGB 3000Mhz
G.Skill TridentZ RGB 3200Mhz
RipjawsV GSkill 2800 Mhz

I want to know what do you think, what pair of 8gb memories should i buy.

Here comes the second question: I want to run those ram sticks at their best speed. Can i oc the mother to run them on (for example) 3000 or 3200?
is it safe?
will my cpu support that?
what about the motherboard?
Do i have to change a lot of configuration in bios? (like voltage, etc)

Please do not consider prices, i can buy any of those memories, i want to buy the best.

Thank you.

 

[Deleted member 217926]

Either Corsair or the GSkill 3200. Based on timings those are the best kits there. Get the one you think looks best.

Yes it will work at the rated speed since you have a Z series motherboard. Just enable XMP in BIOS.

 

[Zerk2012]

I agree with the above on the memory except it might and might not be stable with just enableing XMP you might need to loosen the timings or add a bit more voltage.

 

[Ryunosei]

I agree with the above on the memory except it might and might not be stable with just enableing XMP you might need to loosen the timings or add a bit more voltage.

Is there an easy way to do this? i mean something like "calculate x+y+gfd" or it's random values until i find the best spot?

If it's the second case, how do i know when is it correct and when is not.

 

[Deleted member 217926]

You won't have to do anything but enable XMP. There's no way a Coffee Lake product needs anything extra for DDR4 3000. Moving to DDR4 4000+ might require some tweaking.

 

[Zerk2012]

Were talking the 3200 MHZ with the slower 8400 CPU and yes it might not be that simple.