F3-2400C11D-8GXM - CL / Voltage / ect ... help :(

thuannt05 · Oct 21, 2014

F3-2400C11D-8GXM
I want to downclock this kit to bus 1600, but I have to clue how and what to adjust (CL / Voltage / Everything)
I hope that someone can help me with this. Thank you
Btw, I use mobo Gigabyte B85M-D3H and Core I5 4460

DIMM # 1
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD0000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number F3-2400C11-4GXM
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-2400
Specification PC3-19200
Voltage level 1.650 Volts
Min Cycle time 0.833 ns (1200 MHz)
Max CL 11.0
Min tRP 10.30 ns
Min tRCD 10.30 ns
Min tWR 13.25 ns
Min tRAS 25.38 ns
Min tRC 36.22 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 11.0-13-13-31-44-2T @ 1200 MHz (1.650 Volts)

DIMM # 2
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 F3-2400C11-4GXM
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-2400
Specification PC3-19200
Voltage level 1.650 Volts
Min Cycle time 0.833 ns (1200 MHz)
Max CL 11.0
Min tRP 10.30 ns
Min tRCD 10.30 ns
Min tWR 13.25 ns
Min tRAS 25.38 ns
Min tRC 36.22 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 11.0-13-13-31-44-2T @ 1200 MHz (1.650 Volts)

bgunner · Oct 21, 2014

JEDEC #6 11.0-11-11-28-39 @ 800 MHz
Nominal Voltage 1.50 Volts

set the timmings to 11-11-11-28-39 and the voltage to 1.5 volts. Set teh ram speed 800 MHz OR 1600 MHz depending on how your bios displays the speed. since DDR stands for double data rate you multiply the speed by 2. SO 800 * 2 = 1600.

once you are able to boot I suggest you run memtest86+ for a minimum of 6 passes 11 is preferred to say you are stable. If you want more speed you can try lowering the cas down to 10 and retest to see if you are still stable and so on.

thuannt05 · Oct 21, 2014

its been on auto that way, why do I have to set it manually? I really dont understand

and what will the (X-X-X-XX) number should be like if I want to set CL @ 800 MHz to 9 or 10

Oh and btw, I found this thread, even though its not English but I guess the pictures say it all
Hope you can tell me what to do

[Mini-User-Review] G.SKILL RipjawsX F3-2400C11D-8GXM - Ein P/L Tip? (Teil 2)

bgunner · Oct 21, 2014

I will get you that info and PM you.

JonnyDough · Apr 2, 2015

Old thread but not sure if you ever got your answer and if anyone else goes searching for a solution similar, well - I like people to be informed. I'm a fan of a program called SPECCY to see system info, including RAM timings. I used to use CPU-Z but in my opinion this program is superior.

https://www.piriform.com/speccy

Once you install it, you can click the word RAM and then click "Slot #" to see the timings table.

Your bios may allow you to set the XMP Profile. Some will not, due to the manufacture forsaking updating the motherboard.

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F3-2400C11D-8GXM - CL / Voltage / ect ... help :(

thuannt05

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bgunner

bgunner

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thuannt05

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bgunner

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JonnyDough

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