3200mhz Ram doesn't boot on first channel.

[Coffinjoe]

Really wierd issue thats bothering me, i recently purchased a Vengeance pro rgb 3200mhz 2x8 kit. When i install the kit on the first channel A1 - B1. The pc fails to boot with XMP. When i put the kit on Channel A2-B2 the pc boots fine with XMP on, everything fine, can pass prime95 ram stress with no sweat. Why can't i boot on the first channel with this kit? is there something wrong with MB? My old kit with 2x8 3000mhz from corsair boots fine on the first channel.

Specs: 8700K @4.8 on a Asrock Z370 Gaming K6, latest bios. tried cmos and issue still persists, if i lower the frequency to 3000mhz the pc boots fine on first channel. Is there any downside to using the second channel?

[rEkmAInc1csBnlM6C85H]

A2 & B2 is following the manufacturers spec. It is doubtful anything is wrong, there is probably better BIOS support for your old RAM kit.

 

[Kisai]

21 minutes ago, Coffinjoe said:

Really wierd issue thats bothering me, i recently purchased a Vengeance pro rgb 3200mhz 2x8 kit. When i install the kit on the first channel A1 - B1. The pc fails to boot with XMP. When i put the kit on Channel A2-B2 the pc boots fine with XMP on, everything fine, can pass prime95 ram stress with no sweat. Why can't i boot on the first channel with this kit? is there something wrong with MB? My old kit with 2x8 3000mhz from corsair boots fine on the first channel.

Specs: 8700K @4.8 on a Asrock Z370 Gaming K6, latest bios. tried cmos and issue still persists, if i lower the frequency to 3000mhz the pc boots fine on first channel. Is there any downside to using the second channel?

 

I think you're supposed to use A2-B2 as the above poster said. If it was booting before with a slightly slower kit, the memory might be less stable. I assume you might have intended to want to to run all 4 modules (at 3000) and that might be pushing it, as unmatched modules will only run at the slowest settings and turning XMP on might try to run one set of modules at the other's speed. If you reset the factory defaults on the motherboard and then put the new memory in, or all of it, it might work under those conditions.

 

But generally I think this "works" in the A2-B2 because if you previously used A1-B1 with XMP on, and the new module uses different XMP settings, it probably tried to use the XMP settings from before because the size is the same.

[ZephCloud]

there's nothing wrong...the traces on the motherboard goes there first...