F3-17000CL9D-4GBXL with AMD - Can't go over 1866mhz

[FathomX]

Just bought the Ripjaws X DDR3-2133mhz kit (F3-17000CL9D-4GBXL).

Although I have an AMD based System, I am hitting an absolute limit of 1866mhz @ cas 9.9.9.24.2T. Any frequency above this will result in BSOD, or no POST. I have tried using the XMP profile of 2000mhz which my board supports, however it will not POST at this frequency. I have reset bios, enabled XMP of 2000mhz, with stock timings and 1.6v with no luck. Also have the latest BIOS.

I'm not unhappy with the resulting performance, just wondering if you have any suggestions to pull it even higher? Or have I hit the absolute limit with my processor?

Thanks G.Skill, any help would be appreciated!

PhenomII X4 925 (2.8ghz) OC to 3.5ghz
M4A89GTD Pro/USB3

[GSKILL TECH]

Did you raise CPU-NB Voltage? Is your NB Frequency 3X memory bus speed?

That processor is quite limited.

Thank you
GSKILL TECH

[FathomX]

Yes, I have increased the voltage a bit.
My cpu/nb is currently at 1.25v, 2240 mhz. Ht at 1940 mhz. I have tried pulling it up
To 1.3 v without luck.

as it turns out 1866 isnt stable either at this point. Just wondering if my cpu is limiting factor here
Based on its IMC..?

[GSKILL TECH]

NB Frequency should at least be 2400MHz for DDR3-1600. 2800MHz for DDR3-1866.

Make this change first, then tune CPU/NB Voltage.

Your CPU (FSB) Host Frequency should be 240 for DDR3-1600, 280 for DDR3-1866. 200 is default.

You have not input the correct settings, so we don't know what your CPU limits are.

Thank you
GSKILL TECH

[FathomX]

Thanks for the help by the way, here are my current specs as of right now (stable)

FSB is at 271 x13
CPU frequency @ 3523mhz
NB 2438mhz
DRAM @ 1806mhz

If I attempt to use anything over 2600mhz NB frequency, the computer will not post.

[NemesisChild]

You are going to be very limited with that C2 Denab 925 CPU.
The C2 was the initial release in the Denab lineup, it has a weak IMC (Internal Memory Controller).
The C3 Denab's have an improved IMC and can handle most high frequency sets fairly well.
However, even the C3 Denab is limited, 1600MHz is OK in most setups, any higher is a gimmie.

Be happy you can get 1866MHz, even the C3 Denab's struggle at this level.

If you want 2133MHz, you will need a 990 chipset/board and will have to wait for Bulldozer.

[FathomX]

Alright, that's pretty much what I figured..

What kind of timings can I expect to get from these kits at 1800mhz, I would like to tighten up the timings a bit if possible. I have 8GB (4x2), Running at 9.9.9.24.1T.


P.S.
Can't wait for the bulldozer! ...

[NemesisChild]

Only way to know if tighter timings will work is to try it and test for stability.

My new Crosshair V Formula is waiting patiently for Bulldozer as well.

[GSKILL TECH]

Raising CPU-NB Voltage should help stabilize and improve results.

Thank you
GSKILL TECH

Thanks for the help by the way, here are my current specs as of right now (stable)

FSB is at 271 x13
CPU frequency @ 3523mhz
NB 2438mhz
DRAM @ 1806mhz

If I attempt to use anything over 2600mhz NB frequency, the computer will not post.