XMP Woes

[Ocmersh]

I cannot get my system stable with the default XMP profile that my "G.SKILL Ripjaws 4 Series 64GB (8 x 8GB) 288-Pin DDR4 SDRAM DDR4 2800" came with. I am running this in a Rampage V Extreme with a 5960X Processor. Any attempts lead to system instability that requires a cold boot CMOS reset to get out of(Whether or not I am in the OS). Am I missing something here? Any ideas? It runs fine when left on auto, but I would like to have the memory running what it is rated at, or find the issue that is causing this. The system is not overclocked, (besides what I am attempting to do with the XMP profile of course). I ran the extended test with windows memory diagnostics tools and it found no errors aswell.

[Nena Trinity]

Memtest86 it?

[Ocmersh]

Ill do it. This will be fun going through 64 gb..

[FruitBasketSilex]

Ill do it. This will be fun going through 64 gb..

Check if the XMP sets BCLCK to 125. Some does, and that overclock your processor and various other system busses and leads to general instability.

[Ocmersh]

Check if the XMP sets BCLCK to 125. Some does, and that overclock your processor and various other system busses and leads to general instability.

Its sets my BClCK to 133 actually.

[FruitBasketSilex]

Its sets my BClCK to 133 actually.

Back that off to 100. That would be the cause of your instability. Try 125, actually, and if that works, keep it. If it doesn't, use 100, which is stock.

[Ocmersh]

Back that off to 100. That would be the cause of your instability. Try 125, actually, and if that works, keep it. If it doesn't, use 100, which is stock.

If i do set it to 125 or 100 but keep the other setting should i increase the dram volts? Or perhaps system agent voltage? Ive heard that can help with stability but i havent nailed it down yet

[FruitBasketSilex]

If i do set it to 125 or 100 but keep the other setting should i increase the dram volts? Or perhaps system agent voltage? Ive heard that can help with stability but i havent nailed it down yet

I'd push DRAM voltage to 1.25v, and set BCLCK to 125, see if it's stable, and work voltages/BCLCK down until stable.

[FruitBasketSilex]

You shouldn't need to push voltages up when dropping bclck though

[Ocmersh]

You shouldn't need to push voltages up when dropping bclck though

Alright i'll play with it. As far as voltages go however, does it make a difference if I am trying to push 64GB at that speed or 8GB? id est.. Does the capacity matter? I've heard when using high capacity ram it may be necessary to increase voltages due to overloading of the memory controller on this specific CPU.

[FruitBasketSilex]

Alright i'll play with it. As far as voltages go however, does it make a difference if I am trying to push 64GB at that speed or 8GB? id est.. Does the capacity matter? I've heard when using high capacity ram it may be necessary to increase voltages due to overloading of the memory controller on this specific CPU.

I don't think it should matter. If you encounter any stability issues running stock DDR4 speeds, then that theory holds true, but capacity shouldn't matter for voltage.

[Ocmersh]

I don't think it should matter. If you encounter any stability issues running stock DDR4 speeds, then that theory holds true, but capacity shouldn't matter for voltage.

 

Ok Thank you for your help. I don't have any issues just leaving everything on stock. It should be said that I have attempted to leave it at 100 for the base clock for the cpu and upping just the RAM speed and I have the same issues. I am going to try and play with the voltages and let the timings handle themselves.

[FruitBasketSilex]

Ok Thank you for your help. I don't have any issues just leaving everything on stock. It should be said that I have attempted to leave it at 100 for the base clock for the cpu and upping just the RAM speed and I have the same issues. I am going to try and play with the voltages and let the timings handle themselves.

Alright. Sounds good man, glad I could help.

[Curufinwe_wins]

2800 is a notoriously unstable ddr4 speed. Like so notoriously unstable I'm shocked g-skill still sells 2800 ddr4.

Try 2666 with the same timings (12x133/100) or 3000 (12x133) with slightly looser timings (16-18-18-36.)

Also overclocking 8 sticks of ram to any high speed is really really tough on the memory controller and probably won't work at rated speeds (again I'd load xmp, drop bclk back to 100, and speed to 2666).

For memory overclocking, it really is never recommended to use more than one dimm per channel.

Finally and this is especially true for Samsung memory modules, you should try putting your dimm voltage up to 1.35 V during all of this testing. Micron memory doesn't scale worth a damn with voltage (it actually shows instabilities past 1.4V even at low speeds) but hynix and Samsung scale fairly well and honestly ram temps are never dangerous with ddr4.

[Ocmersh]

2800 is a notoriously unstable ddr4 speed. Like so notoriously unstable I'm shocked g-skill still sells 2800 ddr4.

Try 2666 with the same timings (12x133/100) or 3000 (12x133) with slightly looser timings (16-18-18-36.)

Also overclocking 8 sticks of ram to any high speed is really really tough on the memory controller and probably won't work at rated speeds (again I'd load xmp, drop bclk back to 100, and speed to 2666).

For memory overclocking, it really is never recommended to use more than one dimm per channel.

Finally and this is especially true for Samsung memory modules, you should try putting your dimm voltage up to 1.35 V during all of this testing. Micron memory doesn't scale worth a damn with voltage (it actually shows instabilities past 1.4V even at low speeds) but hynix and Samsung scale fairly well and honestly ram temps are never dangerous with ddr4.

 

 

That is solid advise I will give it a shot thank you. Ill post my findings for any future people with similair issues, Thanks!