[ Ripjaws-X ] F3-14900CL9D-8GBXL voltage and timings

[UnexplodedCow]

Hello all.

This is my first post, and I'm hoping to find some more info about things. Firstly, does anyone have info regarding the RAM in the title? Mainly I have the below questions:

1. What is the maximum safe (IE: 24/7) voltage for these? Is there a warranty voiding voltage limit?

2. This was a gift, and a little more difficult to return because of that, but it is "Intel" memory going in an "AMD" system. Does anyone know of specific timings that might help?

Specific system info:
AMD PhenomII X6 1090T
Gigabyte GA-890FXA-UD5 V2.0 (BIOS F6...newest)
[ Ripjaws-X ] F3-14900CL9D-8GBXL
HD6970 video card

I started going by SPD settings, with all stock (or auto). It is entirely unstable @ DDR1600 or higher. DDR 1066 seems to be unstable in all cases as well, including adjusting basic timings. 1333 will run, but at 8-8-8-24 timings, 1T. Changing to 2T made no difference for the other speeds.

Help is appreciated on this. Many other timings can be set, and I will admit ignorance in knowing what to set. I haven't had much time to play with the RAM yet (about 3 hours), and have considered trying a different motherboard to see if the RAM itself is good, although it's pretty consistent in terms of stability. Yes, I know it's marketed, and spec'd for Intel systems, but I'm trying to make this work anyway.

Thanks!

[NemesisChild]

I actually just bought this set for my backup comp, haven't had time to install them yet.
Manually enter the timings that are displayed on the white sticker: 9-10-9-28
Although these are 1.50v modules, you might have to increase the voltage slightly for stability on an AMD platform.
Try 1.60v and if that doesn't work, try 1.65v.
Also, you might have to increase your CPU/NB voltage to around 1.275-1.30v.
All other memory timings can basically be left set to Auto.

[UnexplodedCow]

Thanks for the reply.

I did try the rated settings over lunch...no change. What kind of voltage can these handle without damaging them? 1.65 sounds a tad high for such a low rated stick.

IMC ran great off 4x2GB kit of Corsair Dominator 1600 (8-8-8-24 1T, 1.65 volt, same CPU settings) using 1.15 volts, but more is required, it seems, to run the Gskill, which doesn't make sense since less DIMMs are filled (2 filled instead of all 4).

[NemesisChild]

In all honesty, if you can't run the modules at the rated speed & voltage, something is wrong.
1600MHz should be no sweat since they are spec'ed at 1866MHz.
I just know from past experience that AMD platforms require more memory voltage with low voltage modules (like these).
You may want to run memtest on each stick individually at your stable 1333MHz@ CL8 settings.
Or try switching them to the other dual channel dimms.
What do you have your CPU/NB and NB voltages set at?

[UnexplodedCow]

I would think the same. The fact that they won't run at 1066 raised an eyebrow. This motherboard has been finicky with RAM...I've seriously considered replacing it because of that. I did try switching DIMMs to 1 and 2, which was less stable than 3 and 4. Gigabyte specifies that 3 and 4 be used for beyond 1600, and I would have to agree, since the computer wouldn't pass POST in slots 1 and 2, and just kept rebooting.

CPU/NB has been set from stock (1.15V) up to 1.25, with no change. Even running at stock NB frequency of 2000 made no change. NB was set at 1.15 originally (as it was with the 4x2GB set) but I went a little higher, to 1.2V. It seems extremely timing sensitive.

I have an Asus M4A89GTD-Pro and a C2 Deneb (X3 740, unlocked, currently at 3.63) to try the RAM in. I imagine that board will be smoother, as it's currently running a 2x4 Gskill set of 1333 at stock settings. All that was required was a modest bump of RAM voltage to 1.55, and has been run that way for 6 months, without issue or error.

If the Gigabyte board proves to be the issue, then I won't hesitate to send it on its way, but I'll need to try some more settings first.

Thanks again, it is appreciated.

[NemesisChild]

Try it with your CPU/NB between 2400-2600MHz with 1.25-1.275v CPU/NB voltage.
8GB+ typically needs a faster (than 2000MHz stock) CPU/NB frequency to run stable.
And bump up the NB voltage to 1.275-1.30v.
If all else fails, increase the memory voltage a notch at a time (up to 1.65v).

[GSKILL TECH]

Are you attempting 240-270 bus frequency? with x6.66 memory multiplier?

Thank you
GSKILL TECH

[UnexplodedCow]

Yes, the bus is at 250 right now, with 6.66x multiplier. 1.5 volts, and timings as stated earlier. The system was rebooted, and CPU speed increased to 3.75 Ghz, still on 1.325 volts. Running LinX and Prime95 again, no crashing, and no issues.

Several hours ago it was not booting with the bus above 200.

EDIT:

I tried the RAM in the Asus board I mentioned, with a C2 Deneb CPU. It was entirely stable, even overclocked and tightened the timings up, all on stock voltage. 1.2 volts for the CPU-NB, 1.2 for the board NB, which is running at 2750. Bus was 250. CPU is 3.63 Ghz on 1.375 volts, with 4 cores running (Tri-core that was unlocked). RAM voltage was 1.5, while running at 1666 with 8-9-8-24 1T timings. Gskill...very good RAM for running that smoothly on lower voltage. I'm bothered that an 890GX board far surpassed an FX board. I know which board to use in the main system now. Thanks for the help and suggestions for this, it gave me enough direction to at least ascertain what was going on.

[GSKILL TECH]

Great, glad to hear you sort that out.

Thank you
GSKILL TECH

[NemesisChild]

Glad to hear that you got the set working properly.
I just ordered a new ASUS AM3 board for my backup comp.
I'm elated that these modules can run at 1666MHz with CL8 timings.
My goal was 1600MHz with CL8 timings, but looks like you can push them a bit further.