F3-12800CL6D-4GBXH with Asus P8P67 Pro

[Wolverine7]

I've got 4 sticks of F3-12800CL6D-4GBXH memory (total of 8GB). According to the specs, this memory should run at 6-8-6-24-2T timing with 1.5V. However, those settings seem to give my 2600K processor w/ Asus P8P67 Pro m/b fits.

If I leave things on Auto or use the XMP profile, then the board keeps "bouncing" (restarting, blinking the red LED lights by the memory and CPU), sometimes endlessly. I've tried forcing the settings to DDR3-1600, 6-8-6-24-2T, 1.5V and had instability (crash Prime95, not blue screen). Increasing to DDR3-1600, 6-8-6-24-2T, 1.6V still has some instability, but not as bad. Increasing to DDR3-1600, 8-8-8-24-2T, 1.6V is stable enough to benchmark. I paid for CAS6 memory that runs at 1.5, but it seems I have CAS8 that needs 1.6V. What do you recommend?

[GSKILL TECH]

Test each kit at a time to see if they can pass rated specs. You can use the XMP Profile to test. If one kit can not pass, send them in for RMA.

Thank you
GSKILL TECH

[Gian92]

Same specs, same problems

I've got 4 sticks of F3-12800CL6D-4GBXH memory (total of 8GB). According to the specs, this memory should run at 6-8-6-24-2T timing with 1.5V. However, those settings seem to give my 2600K processor w/ Asus P8P67 Pro m/b fits.

If I leave things on Auto or use the XMP profile, then the board keeps "bouncing" (restarting, blinking the red LED lights by the memory and CPU), sometimes endlessly. I've tried forcing the settings to DDR3-1600, 6-8-6-24-2T, 1.5V and had instability (crash Prime95, not blue screen). Increasing to DDR3-1600, 6-8-6-24-2T, 1.6V still has some instability, but not as bad. Increasing to DDR3-1600, 8-8-8-24-2T, 1.6V is stable enough to benchmark. I paid for CAS6 memory that runs at 1.5, but it seems I have CAS8 that needs 1.6V. What do you recommend?

Hello, I have the same identical specs exept for the fact that I've got a B3 motherboard and, same issue.
Throughout my testing, if each kit is installed individually it can take the XMP flawlessly.
For each kit tested I've swapped the modules between the two pairs of memory slots to avoid doubts about the interface.
Oddly enough, the only way to have the four modules working is arising voltage/latencies, otherwise the system will be in zombie status with the Mem/CPU check LEDs blinking all the way.

Results of tests:

_Both kits under XMP = zombie PC
_Just one kit under XMP = OK
_Both kits with crummy voltage/latencies settings = OK

So it seems a motherboard or hybrid problem.

A guy in another forum told me there could be two reasons:

_The IMC sets the latencies delay correctly for one kit but incorrectly for two.
_ICs/density of each kit modules not being identical to the ones of the others of the second kit.

I put a third "theory":

Since I've seen the same problem to a guy with just one kit, but with 2x4 GB modules (he could set the right settings with just one module, not with both) I assume it could exist a sort of correct functioning size limit below 8 GB of capacity.

Thanks in advance

[Tradesman]

Do you have the latest BIOS, 1502? Can be found here:

http://www.asus.com/Motherboards/Int..._PRO/#download

Also could have two sets that just don't want to play together

[Gian92]

Bios is already the 1502 version. Yeah maybe I'm just unlucky, I'll try contacting Asus as well prior to sending one kit to the vendor. Thanks

[Onslaught2k3]

the BIOSes on the ASUS website are normally outdated. when only 1408 was available for the M4E, there were overclocking communities that had access to 1485 (much newer, in fact newest BIOS). Some food for thought in case there actually ARE newer BIOSes elsewhere besides the ASUS website.