PC3-14900 running @ 667mhz, tried XMP, not sure which timings to use.

[Erngherngh]

I have 24 gb of G. Skill 14-900. One 16gb kit, one 8gb kit, obviously.

f3-14900CL90-8gbXL - TIMING - CL9-10-9-28 1.5V (These are written on the DIMM's themselves)
f3-14900CL10D-16gbXL - TIMING - CL10-11-10-30 1.5V

When I change the multiplier to 9.33 (1866mhz) the system won't boot.

Gigabyte UD3-990fx revision 4 mobo
FX-9370 running stock

Here's the CPU-Z mem portion text.

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

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD0000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number F3-14900CL10-8GBXL
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-17-23 @ 457 MHz
JEDEC #3 7.0-7-7-20-27 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 666 MHz
JEDEC #6 10.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 10.0
Min tRP 10.16 ns
Min tRCD 11.34 ns
Min tWR 14.88 ns
Min tRAS 31.75 ns
Min tRC 42.28 ns
Min tRFC 260.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 10.0-11-10-30-40-2T @ 933 MHz (1.500 Volts)
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 10.0
Min tRP 10.39 ns
Min tRCD 11.46 ns
Min tWR 15.00 ns
Min tRAS 31.82 ns
Min tRC 42.54 ns
Min tRFC 260.25 ns
Min tRTP 7.50 ns
Min tRRD 4.93 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 10.0-11-10-30-40-1T @ 933 MHz (1.500 Volts)

DIMM # 2
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD0000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number F3-14900CL10-8GBXL
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-17-23 @ 457 MHz
JEDEC #3 7.0-7-7-20-27 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 666 MHz
JEDEC #6 10.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 10.0
Min tRP 10.16 ns
Min tRCD 11.34 ns
Min tWR 14.88 ns
Min tRAS 31.75 ns
Min tRC 42.28 ns
Min tRFC 260.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 10.0-11-10-30-40-2T @ 933 MHz (1.500 Volts)
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 10.0
Min tRP 10.39 ns
Min tRCD 11.46 ns
Min tWR 15.00 ns
Min tRAS 31.82 ns
Min tRC 42.54 ns
Min tRFC 260.25 ns
Min tRTP 7.50 ns
Min tRRD 4.93 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 10.0-11-10-30-40-1T @ 933 MHz (1.500 Volts)

DIMM # 3
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD0000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number F3-14900CL9-4GBXL
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 457 MHz
JEDEC #2 7.0-7-7-19-26 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-24-33 @ 685 MHz
JEDEC #5 10.0-10-10-27-37 @ 761 MHz
JEDEC #6 11.0-11-11-28-39 @ 800 MHz
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 9.0
Min tRP 9.24 ns
Min tRCD 10.16 ns
Min tWR 14.88 ns
Min tRAS 29.50 ns
Min tRC 39.25 ns
Min tRFC 160.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-10-9-28-37-2T @ 933 MHz (1.500 Volts)
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 9.0
Min tRP 9.32 ns
Min tRCD 10.39 ns
Min tWR 15.00 ns
Min tRAS 29.68 ns
Min tRC 39.32 ns
Min tRFC 160.18 ns
Min tRTP 7.50 ns
Min tRRD 4.93 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-10-9-28-37-1T @ 933 MHz (1.500 Volts)

DIMM # 4
SMBus address 0x53
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD0000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number F3-14900CL9-4GBXL
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.3
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 457 MHz
JEDEC #2 7.0-7-7-19-26 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-24-33 @ 685 MHz
JEDEC #5 10.0-10-10-27-37 @ 761 MHz
JEDEC #6 11.0-11-11-28-39 @ 800 MHz
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 9.0
Min tRP 9.24 ns
Min tRCD 10.16 ns
Min tWR 14.88 ns
Min tRAS 29.50 ns
Min tRC 39.25 ns
Min tRFC 160.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-10-9-28-37-2T @ 933 MHz (1.500 Volts)
XMP profile XMP-1866
Specification PC3-14900
Voltage level 1.500 Volts
Min Cycle time 1.071 ns (933 MHz)
Max CL 9.0
Min tRP 9.32 ns
Min tRCD 10.39 ns
Min tWR 15.00 ns
Min tRAS 29.68 ns
Min tRC 39.32 ns
Min tRFC 160.18 ns
Min tRTP 7.50 ns
Min tRRD 4.93 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 9.0-10-9-28-37-1T @ 933 MHz (1.500 Volts)

DIMM # 1
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 11 0B 02 04 21 00 09 03 11 01 08 0C 00 7E 00
10 69 78 69 30 69 11 20 89 20 08 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 21 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 A9 E1
80 46 33 2D 31 34 39 30 30 43 4C 31 30 2D 38 47 42
90 58 4C 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 3F 13 01 08 03 1C 11 2A 09 52 40 00 3B 52
C0 5B 77 10 FE 53 3F 00 20 08 3C 28 00 C8 3C 00 00
D0 10 00 24 CA AB AB E1 A6 00 00 00 00 2A 0A 61 40
E0 00 46 61 6B 8C 11 29 8D 49 00 7D 09 46 2E 00 E9
F0 46 00 00 10 00 24 00 00 00 00 00 00 00 00 00 00

DIMM # 2
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 11 0B 02 04 21 00 09 03 11 01 08 0C 00 7E 00
10 69 78 69 30 69 11 20 89 20 08 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 21 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 A9 E1
80 46 33 2D 31 34 39 30 30 43 4C 31 30 2D 38 47 42
90 58 4C 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 3F 13 01 08 03 1C 11 2A 09 52 40 00 3B 52
C0 5B 77 10 FE 53 3F 00 20 08 3C 28 00 C8 3C 00 00
D0 10 00 24 CA AB AB E1 A6 00 00 00 00 2A 0A 61 40
E0 00 46 61 6B 8C 11 29 8D 49 00 7D 09 46 2E 00 E9
F0 46 00 00 10 00 24 00 00 00 00 00 00 00 00 00 00

DIMM # 3
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 11 0B 02 03 19 00 09 03 11 01 08 0A 00 FC 00
10 69 78 69 30 69 11 18 81 00 05 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 01 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 4F 6C
80 46 33 2D 31 34 39 30 30 43 4C 39 2D 34 47 42 58
90 4C 00 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 3F 13 01 08 03 1C 11 2A 09 4A 20 00 3B 4A
C0 52 77 10 EC 3A 3F 00 00 05 3C 28 00 C8 3C 00 00
D0 10 00 00 CA F2 F2 AB FE 00 00 00 00 2A 0A 57 20
E0 00 46 57 61 8C 11 15 6F 49 00 D7 05 46 2E 00 E9
F0 46 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00

DIMM # 4
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 11 0B 02 03 19 00 09 03 11 01 08 0A 00 FC 00
10 69 78 69 30 69 11 18 81 00 05 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 01 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 4F 6C
80 46 33 2D 31 34 39 30 30 43 4C 39 2D 34 47 42 58
90 4C 00 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 3F 13 01 08 03 1C 11 2A 09 4A 20 00 3B 4A
C0 52 77 10 EC 3A 3F 00 00 05 3C 28 00 C8 3C 00 00
D0 10 00 00 CA F2 F2 AB FE 00 00 00 00 2A 0A 57 20
E0 00 46 57 61 8C 11 15 6F 49 00 D7 05 46 2E 00 E9
F0 46 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00

I have no idea what to set my timings, or if that's what is causing the issue. Any help is appreciated! Thanks!

 

[kanewolf]

Some AMD motherboards limit to 1333 (667 clock) when running 4 DIMMs for stability.

 

[Erngherngh]

Hmmm.... I wonder if mine does?

 

[VincentP]

DDR3-1866 has a maximum frequency of 933 MHz, not 1866 MHz. There are two transfers per clock cycle to achieve a maximum data rate of 1866 MT/s.
Max bandwidth on dimm 1 and 2 is shown as 667 MHz, so perhaps this is the limitation (DDR3-1333 speed).
Have you tried setting the XMP profile?

It would also be worth trying to get it working with just the 16 GB kit first.
If you can successfully run at a higher speed with just this kit installed, you may want to leave it that way. There aren't too many situations where you benefit from more than 16 GB of RAM in a home PC.

 

[Erngherngh]

When I enable XMP, even with it set to auto, it won't POST.... just takes me back into BIOS.

I haven't tried with just the 16gb, but that'll be my next adventure.

 

[VincentP]

When I enable XMP, even with it set to auto, it won't POST.... just takes me back into BIOS.

I haven't tried with just the 16gb, but that'll be my next adventure.

I'm not sure how well XMP profiles work with mixed memory, and you'll always have more trouble getting mixed memory to work at higher speeds.
Try the 16 GB kit with the XMP profile and see how you go from there.

 

[Tradesman1]

Try setting to XMP, 1866 profile, then raise DRAM voltage + 0.10 and set the CPU/NB voltage to 1.25, if no joy let us know the mobo

 

[Erngherngh]

I tried raising the DRAM voltage, but I haven't tried the CPU/NB voltage.

The MOBO is a Gigabyte 990FX UD3 Revision 4, Bios F3.

 

[Erngherngh]

OK! So, I pulled the 8gb of RAM out, and set the DRAM to 1.6V, and the NB Voltage to 1.25V and voila! 937mhz in CPU-Z....

Thanks all! I'm going to grab another 16gb of the same RAm this time, hopefully I don't run into anymore problems!

 

[Tradesman1]

If you do, let me know, mixing sets isn't a good idea, no way to tell if they will play nice - even another set of the same exact model. If problems give a shout and we can make further adjustments an see 😉