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chezmemo View Drop Down
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    Posted: 30 Oct 2016 at 10:03pm
Hello I have a motherboard asrock FM2A88X-ITX +
AMD A10 7890K processor
Ddr3 Corsair Dominator Platinum 2 ? 8GB 2400MHz cl10 ref: CMD16GX3M2A2400C10. My problem is that the motherboard does not use the 2,400 MHz of Ddr3. How should I do? Should he change BIOS? Thank you for your help.
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wardog View Drop Down
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When you say it "does not use the 2,400 MHz of DDR3" are you saying it doesn't boot at all with it, or that it won't run stably with it at 2400?
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chezmemo View Drop Down
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the computer is running but the DDR operates at 1333 MHz with timing 10 12 12 32.
is it possible that my DDR is counterfeit?
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wardog View Drop Down
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Originally posted by chezmemo chezmemo wrote:

the computer is running but the DDR operates at 1333 MHz with timing 10 12 12 32.
is it possible that my DDR is counterfeit?


No, it's most likely not counterfeit.

When you install new or very different sticks they will default to JEDEC "safety' timings of usually 1333 so that they will ba at a low speed, ensuring they will boot to the BIOS for the users to set XMP or the timings manually.

Find the XMP Settings in the BIOS and set it to XMP Profile 1, Save, and reboot.



Post back what happened when you do this please.
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chezmemo View Drop Down
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Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E00000000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)?
Part number CMD16GX3M2A2400C10
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 6.0-6-6-17-22 @ 457 MHz
JEDEC #2 7.0-7-7-20-26 @ 533 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-2400
Specification PC3-19200
Voltage level 1.650 Volts
Min Cycle time 0.833 ns (1200 MHz)
Max CL 10.0
Min tRP 9.96 ns
Min tRCD 9.96 ns
Min tWR 13.25 ns
Min tRAS 25.75 ns
Min tRC 35.75 ns
Min tRFC 260.63 ns
Min tRTP 8.25 ns
Min tRRD 5.75 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-8-19-27-1T @ 728 MHz (1.650 Volts)
XMP #2 10.0-12-12-31-43-1T @ 1200 MHz (1.650 Volts)


It's OK ? or bad ? i'm don't inderstand 
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wardog View Drop Down
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BIOS > OC Tweaker > DRAM Timing Configuration > DRAM Frequency - change from Auto and IIRC you'll the see the XMP setting. Select XMP Profile 1, click the Exit tab, Save and Reboot.

That should set the sticks to 2400.

If it doesn't boot after doing the above, post back and I'll direct you to pushing a smidge more voltage into the memory controller
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chezmemo View Drop Down
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Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E00000000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number CMD16GX3M2A2400C10
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 6.0-6-6-17-22 @ 457 MHz
JEDEC #2 7.0-7-7-20-26 @ 533 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-2400
Specification PC3-19200
Voltage level 1.650 Volts
Min Cycle time 0.833 ns (1200 MHz)
Max CL 10.0
Min tRP 9.96 ns
Min tRCD 9.96 ns
Min tWR 13.25 ns
Min tRAS 25.75 ns
Min tRC 35.75 ns
Min tRFC 260.63 ns
Min tRTP 8.25 ns
Min tRRD 5.75 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-8-19-27-1T @ 728 MHz (1.650 Volts)
XMP #2 10.0-12-12-31-43-1T @ 1200 MHz (1.650 Volts)
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chezmemo View Drop Down
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There is no change...
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wardog View Drop Down
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Grab CPU-z and post screenies of both the Memory and SPD tabs.
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chezmemo View Drop Down
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DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E00000000000000)
Size 8192 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number CMD16GX3M2A2400C10
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 6.0-6-6-17-22 @ 457 MHz
JEDEC #2 7.0-7-7-20-26 @ 533 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-2400
Specification PC3-19200
Voltage level 1.650 Volts
Min Cycle time 0.833 ns (1200 MHz)
Max CL 10.0
Min tRP 9.96 ns
Min tRCD 9.96 ns
Min tWR 13.25 ns
Min tRAS 25.75 ns
Min tRC 35.75 ns
Min tRFC 260.63 ns
Min tRTP 8.25 ns
Min tRRD 5.75 ns
Command Rate 1T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-8-19-27-1T @ 728 MHz (1.650 Volts)
XMP #2 10.0-12-12-31-43-1T @ 1200 MHz (1.650 Volts)
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