AB350 Gaming 3 booting with wrong timings

[Meidal11]

so i saw that AMD got a new bios and chipset out. updated both. now on the motherboard ram support list my ram is there, being able to run at 3000mhz
cmk16gx4m2b3000c15r - ram model
https://www.gigabyte.com/us/Motherboard/GA-AB350-Gaming-3-rev-1x#support-doc

i booted on 3000mhz with the XMP profile, and it worked (used to crash the pc, could run xmp only on 2666 with correct timings and no trouble at all.)
played a game and it felt like my pc is reacting slower. went to CPU-Z and realised my ram speed changed from 15-17-17-35 (which i had on 2666 xmp profile) to 16-17-17-35 (after booting on 3000,2933mhz). It is noticeable. i tried booting with different voltage, different speeds, without the xmp, with the xmp... anything above 2666mhz boost on 16-17-17-35, don't know why, even tho the motherboard suppose to support 3000mhz on 15-17-17-35, as you can see in the link above...
any ideas ? is it a known issue or there's something wrong with my motherboard ?
tried to boot on 1.38v (ram) and no help.
Specs:
r7 1700 (stock, not oc'd.)
gtx 1080
650w antec PSU
Gigabyte AB-350 Gaming 3

thanks ! (if need any more information please tell me)

 

[Dunlop0078]

If your PC is noticeably slower with CL16 than CL15 then something else is at play, no way a small timing change like that would cause noticeably worse performance in really anything besides a RAM specific benchmark.

"anything above 2666mhz boost on 16-17-17-35" What does that mean? The XMP profile should apply 15-17-17-35 timings at 3000mhz. If it does apply that then boots and suddenly it's at CL16 then it might of failed POST and auto applied CL16 so it could boot. I am having trouble understanding your post. Did you try to manually apply 15-17-17-35 3000mhz? If not try it.

 

[Meidal11]

If your PC is noticeably slower with CL16 than CL15 then something else is at play, no way a small timing change like that would cause noticeably worse performance in really anything besides a RAM specific benchmark.

"anything above 2666mhz boost on 16-17-17-35" What does that mean? The XMP profile should apply 15-17-17-35 timings at 3000mhz. If it does apply that then boots and suddenly it's at CL16 then it might of failed POST and auto applied CL16 so it could boot. I am having trouble understanding your post. Did you try to manually apply 15-17-17-35 3000mhz? If not try it.

Tried. I meant i just updated the bios and tried to run at 15-17-17-35, both manually and with the xmp profile. it runs on 16-17-17-35 when the pc boots up. also i tried to switch back to 2666mhz and put the xmp profile, like it was before. it used to boot on 15-17-17-35. it's booting on 16-17-17-35.

 

[zyh1987]

xmp is an Intel thing and memory maker has a very good system in certifying these timing to work with Intel memory controller.
Ryzen has a totally different memory controller, and it's quite new, some of these timings work while others don't. so motherboard maker have to tweak their bios, often with a cross reference technique, to adjust the timing basic on timing and makes of the memory chip to make it work.
Ff course, you can manually input the values, and boot up the voltage, and YMMV.

 

[Meidal11]

xmp is an Intel thing and memory maker has a very good system in certifying these timing to work with Intel memory controller.
Ryzen has a totally different memory controller, and it's quite new, some of these timings work while others don't. so motherboard maker have to tweak their bios, often with a cross reference technique, to adjust the timing basic on timing and makes of the memory chip to make it work.
Ff course, you can manually input the values, and boot up the voltage, and YMMV.

well if i could do that i wouldn't be here. i am manually inputin the values, but it still boots on 16-17-17-35 instead of 15-17-17-35.

 

[zyh1987]

hmm. that's strange,

try clear cmos (pull out the battery) and enter these values, without turning on xmp.

 

[Meidal11]

hmm. that's strange,

try clear cmos (pull out the battery) and enter these values, without turning on xmp.

tried.

 

[Meidal11]

If your PC is noticeably slower with CL16 than CL15 then something else is at play, no way a small timing change like that would cause noticeably worse performance in really anything besides a RAM specific benchmark.

"anything above 2666mhz boost on 16-17-17-35" What does that mean? The XMP profile should apply 15-17-17-35 timings at 3000mhz. If it does apply that then boots and suddenly it's at CL16 then it might of failed POST and auto applied CL16 so it could boot. I am having trouble understanding your post. Did you try to manually apply 15-17-17-35 3000mhz? If not try it.

http://prntscr.com/j19ngn
http://prntscr.com/j19nxl
when not using xmp getting higher numbers (16-18-18-4x) and when using xmp on same ram speed when trying to boot 15-17-17-35 with manual timings on bios it's booting on 16-17-17-35 as i already mentioned, and after benchmarking these are the results... any idea ? higher timings (automatic by bios) giving me same/even better benchmark than lower timings ? what's going on ?
thanks...

 

[Neur0nauT]

I have this mobo, and 8gb 3200 LPX. I don't use the XMP profile at all. I just set the voltage to 1.35v and input manual timings for this RAM and it works like a charm. FYI I'm running the F20 bios since it has been the most stable for me to date. I've tried every version up to F22 then rolled back until it was stable with my 3.8Ghz OC.

 

[rgd1101]

MERGED QUESTION
Question from Meidal11 : "mobo won't boot with correct manual timings"

gigabyte ab-350 gaming 3
gtx 1080
2x8 corsair vengeance 3000mhz

same as topic. goin into manual timings, putting 15-17-17-35 (as it should be) and pc is booting on 16-17-17-35.
lastest bios and chipset.
the ram got supported in the last bios (i think)
https://www.gigabyte.com/us/Motherboard/GA-AB350-Gaming-3-rev-1x#support-doc

any idea ? bad mobo ? i'm on dual channel tho.
for any required information tell me please.
http://prntscr.com/j19jb4
http://prntscr.com/j19jie
same goes for booting on 3000mhz (which is the ram speed and the supported speed on gigabyte's website.)

p.s:
http://prntscr.com/j19ngn
http://prntscr.com/j19nxl

the 16-18-18-44 is without xmp
16-17-17-35 is when i booted with xmp and manual timings on 15-17-17-35
looking on the timings and latency - does it maker any sense ? am i missing anything ? something i should know about ?

Memory part number or link to it?

 

[Meidal11]

I have this mobo, and 8gb 3200 LPX. I don't use the XMP profile at all. I just set the voltage to 1.35v and input manual timings for this RAM and it works like a charm. FYI I'm running the F20 bios since it has been the most stable for me to date. I've tried every version up to F22 then rolled back until it was stable with my 3.8Ghz OC.

well, not for me...

 

[Meidal11]

anyone ?

 

[Meidal11]

up

 

[Meidal11]

up...

 

[Meidal11]

.