F3-12800CL7D-4GBRH problems on MSI 790FX-GD70

[MadDias]

Hi,

i already posted this on 3 different forums, but noone is able to help me.
i bought the ddr3 1600 cl7 ripjaw 4gb kit and can?t get it to run on the 1:4 mem divider with cl7 timings. when i set cl7 and exit&save the bios i receive a "cmos checksum bad" error on the next power on self test.
it runs fine at cl9, but that?s not what i bought it for.
the only way to get 800mhz and cl7 is to use the 1:3.33 divider and a htt of 240mhz.
do i miss any special timings setting to get this ram to run?
i already tried bumping various voltages up (cpu-nb, nb, ht, vdimm) with no luck.

[GSKILL TECH]

Please post up BIOS pictures and we will see what you may be missing.

Thank you
GSKILL SUPPORT

[MadDias]

are u familiar with the 790fx-gd70 bios?
right now i have the ram running at 1333 7-7-7-24 everything else is on auto.
i don?t have a cam here at the moment, but u can see shots of the bios here in this thread about the mainoard on xs
http://www.xtremesystems.org/forums/...13&postcount=3
there?s alot of stuff to adjust for the memory...

[Tradesman]

What CPU are you running?

[Tradesman]

If the numbers shown match yours, you might want to kick up the tRFC to 127 or so

[MadDias]

Cpu is a phenomII 965be
Trfc is shown in nanoseconds from 110ns up to 350ns.
What is 127 translated to nanoseconds?
Do all three trfc have the same value?

[Tradesman]

try 127.5ns in the primary tRFC and 110ns in the following

[MadDias]

127.5ns isn?t available, so i tried 160-110-110-110
still doesn?t work..

[GSKILL TECH]

What type of issues are you having? Same "cmos checksum bad" every time?

Try 160-160-160-160 Enter all the timings in manually. What are all of your voltages set at?

Thank you
GSKILL SUPPORT

[MadDias]

What type of issues are you having? Same "cmos checksum bad" every time?

Try 160-160-160-160 Enter all the timings in manually. What are all of your voltages set at?

Thank you
GSKILL SUPPORT

I'm at work at the moment, but I'll try 160-160-160-160 when I get home.
The issue is always the same "cmos checksum bad" when i set cl7.
I found out that the same thing happens when i try setting cl6 on the 1:3.33 divider.

[GSKILL TECH]

If you still have issues afterwards, go ahead and send them in for new replacements and see if they will be better.

Thank you
GSKILL SUPPORT

[MadDias]

i?m still having this issue...
i doubt that sending them in for a replacement of the exact same model will solve the issue.
i had another set of f3-12800cl7d-4gbrh here that was another revision. my sticks have a sticker on them that says 7-7-7-21@1.65v and the other set had a sticker on them that said 7-7-7-24@1.65v. so i guess they were a different revision, but i had the exact same issue with them too.
this is, as far as i know, the only cl7 ddr3 1600 4gb dual channel kit from g.skill. i know that these modules are designed for i5 and p55 chipset, but i would send them in if i get modules back that have been tested on am3 too.

[dw33b]

Same Issue Here, Too

I am experiencing the exact same behavior as MadDias: I can get 1600 at CL9, or 1333 at CL7, but not 1600 at CL7. I have two identical systems except for CPU. CPU1=Phenom II X4 955, CPU2=Phenom II X4 945. Otherwise:
Mobo: MSI 790FX-GD70, latest BIOS ver 1.4
RAM: G.Skill F3-12800CL7D-4GBRH (Note: 1 stick (2GB) in each machine)
HD: Western Digital Black WD6401AALS, 640GB SATA II
PSU: Corsair CMPSU-650TX 650W
Video: Saphire 100279-1GL Radeon HD4870 1GB 256-bit GDDR5
Memory set to UNGANGED

The following setups will boot and run XP just fine.
FSB/DRAM Ratio: 1:3.33, 1333
Advanced DRAM Config:
DRAM voltage 1.6V
CAS = 7
tRCD = 7
tRP = 7
tRAS = 24
1T/2T = 1T
Rest at Auto/Default
OR
FSB/DRAM Ratio: 1:4, 1600
DRAM voltage 1.6V
1T/2T=1T
Rest at Auto/Default

However, the following setup yields a "cmos checksum bad" error:
FSB/DRAM Ratio: 1:4
AND
Advanced DRAM Config:
CAS = 7
tRCD = 7
tRP = 7
tRAS = 24
1T/2T = 2T
tRFC0, 1, 2 &3 = 350
Rest at Auto/Default
DRAM voltage tried at both 1.6V and 1.65V

Please advise. Thanks,
dw33b

[GSKILL TECH]

If you could post up some BIOS pictures, I can take a look at what you may have set incorrectly especially as far as advanced timings.

Thank you
GSKILL SUPPORT

[dw33b]

http://i1015.photobucket.com/albums/...ttachment0.jpg
http://i1015.photobucket.com/albums/...ttachment1.jpg
http://i1015.photobucket.com/albums/...ttachment2.jpg
http://i1015.photobucket.com/albums/...ttachment3.jpg
http://i1015.photobucket.com/albums/...ttachment4.jpg
http://i1015.photobucket.com/albums/...ry_current.jpg
http://i1015.photobucket.com/albums/...mory_table.jpg

Note: When I try the settings listed in the second image, I will get the cmos checksum error mentioned previously. The CPU-Z pics are when I leave the CAS settings on AUTO.