ASRock Forums : 4x16GB breaks XMP on Z390 https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 22:58:11 +0000 Wed, 06 Jan 2021 17:58:10 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=17734 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[4x16GB breaks XMP on Z390 : Hi,Running 2x16GB Corsair Vengeance...]]> https://forum.asrock.com/forum_posts.asp?TID=17734&PID=82863&title=4x16gb-breaks-xmp-on-z390#82863 Author: janp
Subject: 17734
Posted: 06 Jan 2021 at 5:58pm

Hi,

Running 2x16GB Corsair Vengeance LPX with i9 9900K perfectly for one year now in XMP mode.

I added 2 extra memory modules to get 4x32GB.Also Corsair Vengeance LPX.

Now the PC won't start. After several attempts it allows me in the bios.
When I change XMP (profile 1) to auto the PC boots and works perfect.
The system sees the 64Gb, but the performance is terrible.

Benchmarks are suddenly terrible.

I've added the memory info from CPU-Z

Thanks for helping out.

Memory SPD
-------------------------------------------------------------------------

DIMM #                    1
     SMBus address          0x50
     Memory type          DDR4
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E00000000000000000000)
     SDRAM Manufacturer (ID)     Micron Technology (2C000000000000000000000000)
     Size               16384 MBytes
     Max bandwidth          DDR4-2132 (1066 MHz)
     Part number          CMK32GX4M2E3200C16
     Nominal Voltage          1.20 Volts
     EPP               no
     XMP               yes
     XMP revision          2.0
     AMP               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          7.0-7-7-18-25 @ 518 MHz
     JEDEC #2          8.0-8-8-20-28 @ 592 MHz
     JEDEC #3          9.0-9-9-22-31 @ 666 MHz
     JEDEC #4          10.0-10-10-25-35 @ 740 MHz
     JEDEC #5          11.0-11-11-27-38 @ 814 MHz
     JEDEC #6          12.0-12-12-30-42 @ 888 MHz
     JEDEC #7          13.0-13-13-32-45 @ 962 MHz
     JEDEC #8          14.0-14-14-35-49 @ 1037 MHz
     JEDEC #9          15.0-15-15-36-50 @ 1066 MHz
     JEDEC #10          16.0-15-15-36-50 @ 1066 MHz
     JEDEC #11          17.0-15-15-36-50 @ 1066 MHz
     JEDEC #12          18.0-15-15-36-50 @ 1066 MHz
     JEDEC #13          19.0-15-15-36-50 @ 1066 MHz
     JEDEC #14          20.0-15-15-36-50 @ 1066 MHz
     JEDEC #15          21.0-15-15-36-50 @ 1066 MHz
     JEDEC #16          22.0-15-15-36-50 @ 1066 MHz
     JEDEC #17          23.0-15-15-36-50 @ 1066 MHz
     JEDEC #18          24.0-15-15-36-50 @ 1066 MHz
XMP profile               XMP-3200
     Specification          DDR4-3200
     Voltage level          1.350 Volts
     Min Cycle time          0.625 ns (1600 MHz)
     Max CL               16.0
     Min tRP               12.49 ns
     Min tRCD          12.49 ns
     Min tRAS          23.61 ns
     Min tRC               35.62 ns
     Min tRRD          3.75 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               7.0-9-9-17-25-n.a @ 700 MHz (1.350 Volts)
     XMP #2               8.0-11-11-19-29-n.a @ 800 MHz (1.350 Volts)
     XMP #3               9.0-12-12-22-33-n.a @ 900 MHz (1.350 Volts)
     XMP #4               10.0-13-13-24-36-n.a @ 1001 MHz (1.350 Volts)
     XMP #5               11.0-14-14-27-40-n.a @ 1101 MHz (1.350 Volts)
     XMP #6               12.0-16-16-29-43-n.a @ 1201 MHz (1.350 Volts)
     XMP #7               13.0-17-17-31-47-n.a @ 1301 MHz (1.350 Volts)
     XMP #8               14.0-18-18-34-50-n.a @ 1401 MHz (1.350 Volts)
     XMP #9               15.0-19-19-36-54-n.a @ 1501 MHz (1.350 Volts)
     XMP #10               16.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #11               17.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #12               18.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #13               19.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #14               20.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #15               21.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #16               22.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #17               23.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #18               24.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)

DIMM #                    2
     SMBus address          0x51
     Memory type          DDR4
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E00000000000000000000)
     SDRAM Manufacturer (ID)     Samsung (CE000000000000000000000000)
     Size               16384 MBytes
     Max bandwidth          DDR4-2132 (1066 MHz)
     Part number          CMK32GX4M2B3200C16
     Nominal Voltage          1.20 Volts
     EPP               no
     XMP               yes
     XMP revision          2.0
     AMP               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          9.0-9-9-22-31 @ 666 MHz
     JEDEC #2          10.0-10-10-25-35 @ 740 MHz
     JEDEC #3          11.0-11-11-27-38 @ 814 MHz
     JEDEC #4          12.0-12-12-30-42 @ 888 MHz
     JEDEC #5          13.0-13-13-32-45 @ 962 MHz
     JEDEC #6          14.0-14-14-35-49 @ 1037 MHz
     JEDEC #7          15.0-15-15-36-50 @ 1066 MHz
     JEDEC #8          16.0-15-15-36-50 @ 1066 MHz
XMP profile               XMP-3200
     Specification          DDR4-3200
     Voltage level          1.350 Volts
     Min Cycle time          0.625 ns (1600 MHz)
     Max CL               16.0
     Min tRP               11.24 ns
     Min tRCD          11.24 ns
     Min tRAS          22.36 ns
     Min tRC               33.74 ns
     Min tRRD          3.74 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               9.0-11-11-21-31-n.a @ 900 MHz (1.350 Volts)
     XMP #2               10.0-12-12-23-34-n.a @ 1001 MHz (1.350 Volts)
     XMP #3               11.0-13-13-25-38-n.a @ 1101 MHz (1.350 Volts)
     XMP #4               12.0-14-14-27-41-n.a @ 1201 MHz (1.350 Volts)
     XMP #5               13.0-15-15-30-44-n.a @ 1301 MHz (1.350 Volts)
     XMP #6               14.0-16-16-32-48-n.a @ 1401 MHz (1.350 Volts)
     XMP #7               15.0-17-17-34-51-n.a @ 1501 MHz (1.350 Volts)
     XMP #8               16.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #9               17.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #10               18.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #11               19.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #12               20.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)

DIMM #                    3
     SMBus address          0x52
     Memory type          DDR4
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E00000000000000000000)
     SDRAM Manufacturer (ID)     Micron Technology (2C000000000000000000000000)
     Size               16384 MBytes
     Max bandwidth          DDR4-2132 (1066 MHz)
     Part number          CMK32GX4M2E3200C16
     Nominal Voltage          1.20 Volts
     EPP               no
     XMP               yes
     XMP revision          2.0
     AMP               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          7.0-7-7-18-25 @ 518 MHz
     JEDEC #2          8.0-8-8-20-28 @ 592 MHz
     JEDEC #3          9.0-9-9-22-31 @ 666 MHz
     JEDEC #4          10.0-10-10-25-35 @ 740 MHz
     JEDEC #5          11.0-11-11-27-38 @ 814 MHz
     JEDEC #6          12.0-12-12-30-42 @ 888 MHz
     JEDEC #7          13.0-13-13-32-45 @ 962 MHz
     JEDEC #8          14.0-14-14-35-49 @ 1037 MHz
     JEDEC #9          15.0-15-15-36-50 @ 1066 MHz
     JEDEC #10          16.0-15-15-36-50 @ 1066 MHz
     JEDEC #11          17.0-15-15-36-50 @ 1066 MHz
     JEDEC #12          18.0-15-15-36-50 @ 1066 MHz
     JEDEC #13          19.0-15-15-36-50 @ 1066 MHz
     JEDEC #14          20.0-15-15-36-50 @ 1066 MHz
     JEDEC #15          21.0-15-15-36-50 @ 1066 MHz
     JEDEC #16          22.0-15-15-36-50 @ 1066 MHz
     JEDEC #17          23.0-15-15-36-50 @ 1066 MHz
     JEDEC #18          24.0-15-15-36-50 @ 1066 MHz
XMP profile               XMP-3200
     Specification          DDR4-3200
     Voltage level          1.350 Volts
     Min Cycle time          0.625 ns (1600 MHz)
     Max CL               16.0
     Min tRP               12.49 ns
     Min tRCD          12.49 ns
     Min tRAS          23.61 ns
     Min tRC               35.62 ns
     Min tRRD          3.75 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               7.0-9-9-17-25-n.a @ 700 MHz (1.350 Volts)
     XMP #2               8.0-11-11-19-29-n.a @ 800 MHz (1.350 Volts)
     XMP #3               9.0-12-12-22-33-n.a @ 900 MHz (1.350 Volts)
     XMP #4               10.0-13-13-24-36-n.a @ 1001 MHz (1.350 Volts)
     XMP #5               11.0-14-14-27-40-n.a @ 1101 MHz (1.350 Volts)
     XMP #6               12.0-16-16-29-43-n.a @ 1201 MHz (1.350 Volts)
     XMP #7               13.0-17-17-31-47-n.a @ 1301 MHz (1.350 Volts)
     XMP #8               14.0-18-18-34-50-n.a @ 1401 MHz (1.350 Volts)
     XMP #9               15.0-19-19-36-54-n.a @ 1501 MHz (1.350 Volts)
     XMP #10               16.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #11               17.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #12               18.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #13               19.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #14               20.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #15               21.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #16               22.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #17               23.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)
     XMP #18               24.0-20-20-38-57-n.a @ 1600 MHz (1.350 Volts)

DIMM #                    4
     SMBus address          0x53
     Memory type          DDR4
     Module format          UDIMM
     Module Manufacturer(ID)     Corsair (7F7F9E00000000000000000000)
     SDRAM Manufacturer (ID)     Samsung (CE000000000000000000000000)
     Size               16384 MBytes
     Max bandwidth          DDR4-2132 (1066 MHz)
     Part number          CMK32GX4M2B3200C16
     Nominal Voltage          1.20 Volts
     EPP               no
     XMP               yes
     XMP revision          2.0
     AMP               no
JEDEC timings table          CL-tRCD-tRP-tRAS-tRC @ frequency
     JEDEC #1          9.0-9-9-22-31 @ 666 MHz
     JEDEC #2          10.0-10-10-25-35 @ 740 MHz
     JEDEC #3          11.0-11-11-27-38 @ 814 MHz
     JEDEC #4          12.0-12-12-30-42 @ 888 MHz
     JEDEC #5          13.0-13-13-32-45 @ 962 MHz
     JEDEC #6          14.0-14-14-35-49 @ 1037 MHz
     JEDEC #7          15.0-15-15-36-50 @ 1066 MHz
     JEDEC #8          16.0-15-15-36-50 @ 1066 MHz
XMP profile               XMP-3200
     Specification          DDR4-3200
     Voltage level          1.350 Volts
     Min Cycle time          0.625 ns (1600 MHz)
     Max CL               16.0
     Min tRP               11.24 ns
     Min tRCD          11.24 ns
     Min tRAS          22.36 ns
     Min tRC               33.74 ns
     Min tRRD          3.74 ns
XMP timings table          CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
     XMP #1               9.0-11-11-21-31-n.a @ 900 MHz (1.350 Volts)
     XMP #2               10.0-12-12-23-34-n.a @ 1001 MHz (1.350 Volts)
     XMP #3               11.0-13-13-25-38-n.a @ 1101 MHz (1.350 Volts)
     XMP #4               12.0-14-14-27-41-n.a @ 1201 MHz (1.350 Volts)
     XMP #5               13.0-15-15-30-44-n.a @ 1301 MHz (1.350 Volts)
     XMP #6               14.0-16-16-32-48-n.a @ 1401 MHz (1.350 Volts)
     XMP #7               15.0-17-17-34-51-n.a @ 1501 MHz (1.350 Volts)
     XMP #8               16.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #9               17.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #10               18.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #11               19.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)
     XMP #12               20.0-18-18-36-54-n.a @ 1600 MHz (1.350 Volts)]]> Wed, 06 Jan 2021 17:58:10 +0000 https://forum.asrock.com/forum_posts.asp?TID=17734&PID=82863&title=4x16gb-breaks-xmp-on-z390#82863