Cannot get RAM frequency above DDR3-800

[defever3]

I have a set of G.Skill Ripjaws RAM, rated for DDR3-1600 9-9-9-24 1.5V. However, my mobo defaults the ram to DDR3-800 6-6-6-15.

I am aware that DDR3 is double rate. My BIOS reads it as DDR3-800 and CPU-Z reads it at 400mhz. When I go in to manually set the timings and frequency, Prime95 fails on every setting within minutes. Tried increasing DRAM voltage, tried increasing NB frequency, not sure where to go from here. I have a rock solid OC on the processor, but I don't think that should impact a jump from DDR3-800 to even DDR3-1066? (Rock solid like 24 hrs Prime95 no errors)

ASRock 990FX Xtreme3
AMD Phenom II 1090t (OC'd at 19x multiplier x 211 MHz, 4.00 GHz)
4x4gb Ripjaw G.Skill
Lepa 850w PSU
EVGA GTX 770 4gb
120 SSD Mushkin

Any advice or recommendations are welcome. My current theory is a bad RAM slot and/or bad stick, however I haven't had the time to test them all individually, and if this was the case I would think that even the default settings would fail yeah? If I am missing something very obvious please let me know. Thanks!

 

[getochkn]

Did you try 1 stick at a time in different slots to narrow it down to either a bad slot or bad stick? Process of elimination.

 

[cuecuemore]

Are you able to take it to 1600 10-10-10-28? Have you tried raising the voltage above 1.5? It may not be a "bad stick", it may be that one of them just needs a little more voltage. Usually when it's a bad stick it won't boot at all.

 

[defever3]

Are you able to take it to 1600 10-10-10-28? Have you tried raising the voltage above 1.5? It may not be a "bad stick", it may be that one of them just needs a little more voltage. Usually when it's a bad stick it won't boot at all.

I have tried raising voltage up to 1.65 with no luck (even with frequency of 1066), and also tried to loosen the timings and no go. Any other thoughts?

 

[defever3]

Did you try 1 stick at a time in different slots to narrow it down to either a bad slot or bad stick? Process of elimination.

I have tried to take out 2 of the sticks, but haven't had time to try a full trial-and-error process (each stick in each slot, etc.) Will try this when I get more time, although I have a sneaking suspicion I will probably encounter the same issue with each stick/slot based on previous testing

 

[Akashdeep]

Did you try 1 stick at a time in different slots to narrow it down to either a bad slot or bad stick? Process of elimination.

I have tried to take out 2 of the sticks, but haven't had time to try a full trial-and-error process (each stick in each slot, etc.) Will try this when I get more time, although I have a sneaking suspicion I will probably encounter the same issue with each stick/slot based on previous testing

Go to BIOS, enable XMP and select Profile 1. Save and Exit.

Restart.

Then let us know.

 

[cuecuemore]

No XMP on his motherboard.

 

[Akashdeep]

He has to check XFAST RAM enable or not in BIOS.

 

[defever3]

Did you try 1 stick at a time in different slots to narrow it down to either a bad slot or bad stick? Process of elimination.

I have tried to take out 2 of the sticks, but haven't had time to try a full trial-and-error process (each stick in each slot, etc.) Will try this when I get more time, although I have a sneaking suspicion I will probably encounter the same issue with each stick/slot based on previous testing

Go to BIOS, enable XMP and select Profile 1. Save and Exit.

Restart.

Then let us know.

I already had XMP Profile 1 active. I have managed to get something relatively stable at 1333mhz by going back to stock clocks, setting the RAM timings and speed manually, and then stepping the CPU multiplier up slowly to get the OC back (now have it at 19.5x, 200mhz, 3.9GHz total). Can't get the RAM to 1600 though, even with the CPU clocks back at stock, voltage increase on the RAM, and loosening the timings.

Am I missing some sort of setting to balance out the RAM? (NB Voltage, HT speed, etc.)

 

[Akashdeep]

Try increasing RAM volt by 0.05V only, not 1.65V.

 

[gskill support]

Here is a guide:

http://www.gskill.us/forum/showthread.php?t=7688

XMP is known as DOCP or EOCP in AMD motherboards.

Thank you
GSKILL SUPPORT

 

[Tradesman1]

Try them initially at 1333 9-9-9-24, 2N 1.5 and see if that works, your CPU may be having a problem trying to run 1600

 

[defever3]

Did you try 1 stick at a time in different slots to narrow it down to either a bad slot or bad stick? Process of elimination.

Sorry for long delay on this one, it did end up being 2 bad slots on the mobo. Process of elimination worked to isolate the issue. Good call thanks man!