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Asrock Fatal1ty B450 Gaming K4 - XMP issue |
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Dr@gonXP 
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Joined: 09 Sep 2018 Location: Germany Status: Offline Points: 10 |
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 Topic: Asrock Fatal1ty B450 Gaming K4 - XMP issuePosted: 09 Sep 2018 at 10:59pm |
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Hi All,
I am using an Asrock Fatal1ty B450 Gaming K4 and basically everything is fine, except a small issue. I have Corsair Vengeance LPX DIMM Kit 8GB, DDR4-3000, CL15-17-17-35 (CMK8GX4M2B3000C15), the XMP Profile is shown correcty, but set wrong. Read out: 15-17-17-35 Set to: 16-17-17-35 Could it be a Bios Bug? Following additional hardware is used: Raven Ridge APU 2200G Intel SSD 600p 256GB be quiet! Pure Power 10-CM 400W Thanks in advance!
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datonyb
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Joined: 11 Apr 2017 Location: London U.K. Status: Offline Points: 3139 |
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Posted: 10 Sep 2018 at 12:02am |
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its because you have geardown mode enabled this when switched on stops all ram from using the odd numbered timing on primary number eg cl15 shows as cl15 until windows boots then is forced to be cl16 cl13 would be forced to be cl14 etc etc its an amd bios thing
Edited by datonyb - 10 Sep 2018 at 12:03am |
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 [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
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Dr@gonXP
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Posted: 10 Sep 2018 at 12:49am |
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Thanks, understand.
Tried to disable Gear Down Mode, but then the system just boot in fail save mode (DDR4 2133), so I leave it enabled and work with CL16 (very stable and no issues). EDIT: Just tried to set manually to CL14, system booted, checked setting with CPU-Z and system was set to CL14... Then tried to set it to CL15 and it ended in CL16 again... strange...
Edited by Dr@gonXP - 10 Sep 2018 at 12:56am |
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datonyb
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Posted: 10 Sep 2018 at 1:15am |
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no its not its exactly as i said geardown enabled wont allow cl15 or cl17 or cl13 etc it will allow even numbers like 12/14/16/18 if you can tweak things to get cl14 stable then great it'll help a little in all pc tasks and games just disabling geardown dosnt usually work anyway you tend to have to set up bank group swap etc to suit your ram and maybe bump the volts etc there is a lot of logic to just leaving it stable at xmp ,rather than chase tighter or faster timings that may take ages to find stable
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[url=https://valid.x86.fr/jpg250]
[/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
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Dr@gonXP
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Posted: 10 Sep 2018 at 2:09am |
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Agreed, will leaf it at XMP @CL16, runs very smooth
 I tell you, 15 years ago, overclocking / tweaking was much easier
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datonyb
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Posted: 10 Sep 2018 at 3:00am |
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haha yes we either booted the athlonx2 at a faster speed or it didnt ............... we didnt have as many bios options either by quite an amount less.........
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[url=https://valid.x86.fr/jpg250]
[/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
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Dr@gonXP
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Posted: 10 Sep 2018 at 3:46am |
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That's right Mate
 Thanks for your help!
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