tommiboi wrote:
are you saying you use the IGPU ? and not an external GPU ?
samuel9521 wrote:
The fact is that the motherboard actually supports ram at 3866, and for now I haven't the gpu. The igpu shares system memory so I can see the difference in games between 3200MHz and 3600MHz.
On the mobo support page, it says that it accepts the 2x4GB non-RGB version of G.Skill Trident Z ram @3866. Maybe 16GB are too many for this moterboard, I don't think the RGB leds can make a difference.
He's using processor iGPU (which shares main memory), not PCIe GPU (with onboard VRAM). So faster memory = faster graphics.
F4-3866C18D-16GTZR is single-sided single-rank Samsung (20nm) 8Gb B-die
K4A8G085WB-BCPB. Nice kit.
STRIX Z270F specifications do list "support" for up to DDR4-3866(O.C.)
I couldn't find a DDR4 QVL for this mobo, F4-3866C18D-16GTZR may or may not technically qualify as "compatible" memory.
Of course anything faster than the JEDEC-2400 natively supported in a KBL CPU is an overclock and has *absolutely no guarantee* of working at (faster) non-JEDEC speeds. But it's not too hard to run it faster (even a lot faster) on a decent mobo like this one, especially with some extra voltage.
Yet DDR4-3866 is the top extreme ASUS advertises on the STRIX Z270F (it probably failed with the DDR4-4000, -4133, and even -4266 memories they tested successfully on MAXIMUS IX mobos). I suspect ASUS might have used low-density (2x2GB or 2x4GB) DIMMs or even a single DIMM when performing these tests - and it's obvious they used an "above average" CPU with strong iMCs - they may have even used exotic cooling. But I don't know the specifics. ASUS might volunteer more accurate information.
The main hardware factor limiting your DDR4 XMP/overclock is usually your particular CPU part, not your particular motherboard part.
iGPU uses power and produces heat, so using it will limit the budgets flowing through the rest of the silicon die. I think you'll be able to run your RAM faster (though perhaps still not at full DDR4-3866) when using PCIe GPU instead of iGPU.
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