In my new X99 build, I opted for Kingston HyperX Predator DDR4-2800, CL14 RAM.
The problem is, once I choose the 2800Mhz XMP-Profile, it sets the Baseclock to 127Mhz, which is in my opinion completely impossible to run with an Intel-CPU and the CPU clock jumps to 5.something Ghz which is entirely ridiculous.
The system wont even boot in that profile. I'm running XMP 2 right now, which is 2666Mhz CL 14.
Can anybody explain to me how this is supposed to work?
What motherboard do you have?
Sounds like my X99S MPOWER with the same RAM. Yeah I don't know why the clock rates get so skewed with HyperX DDR4-2800, but I would suggest just running at 2666 unless you need that extra speed for a RAM-Disk. I've noticed no difference, and all system-wide benchmarks give right around the same scores as if you had DDR4-2800.
You can try forcing the RAM speed without XMP. Set RAM base to 1.00x and then choose a 2800Mhz profile if you have it available in the BIOS. It's not a perfect solution, but it seems the only one.
Yeah, the impact is probably negligible, but it still bugs me.
The mobo is indeed an MSI, it's the X99S SLI Krait edition. I'm actually not a huge fan of the MSI bios. To my liking the ASUS or Gigabyte UEFI-Bios is much easier to handle.
Yeah the MSI BIOS isn't perfect, but it still offers the same settings thankfully. I haven't bothered messing with the memory settings much since it has been pretty reluctant to get to 2800MHz. I can really only advise you to run it at 2666MHz.
Running as a RAM-Cache, that only drops effective read/write by 1 - 3 GB/s out of 12GB/s. So it's not like it isn't noticeable in apps that will recognize the extra speed, but in practical workloads it won't change your performance.
Don't worry, I'm not even looking at RamCache. I'm pretty happy with my performance.
But I'd still like to figure out how this is supposed to work. I mean they sell it as DDR4-2800 so it should be possible to run it like that without LN2 cooling ;-)
I'm still kinda new to Intel overclocking since I just recently switched from AMD, which was a lot simpler imho.
I really have to work my way into how all of that works.
Completely normal.
Thats how the high speed kits are spec'd and it'll be written in the fine print. Increasing the base clock etc.
There are plenty of 2011-E cpu's - especially the 5930k's that cant run ram past 2400.
Check out this old review - no way the sped'd 3000mhz kit would run
http://www.overclock3d.net/reviews/cpu_mainboard/intel_core_i7_5820k_review/2
AMD was way simpler. I'm in the same boat, switched from an FX-8350 to the 5820K in November. Way more things to be careful about in Intel systems.
Overclocking the RAM itself should actually be easier now, since DDR4 has such a huge amount of headroom. I mean JEDEC has specification for DDR4 to hit 4266MHz or more by 2018. 2800MHz shouldn't be a big deal.
I say get into that BIOS and start tweaking. Since DDR4 has all that headroom you might be surprised what kind of punishment it can take. I'm not far behind on that either, I've been looking into pushing the speed to 3000MHz without having to screw with BCLK. Just have to balance out clocks with timing and you're good.
Just like it says in that overclock3d review, my 5930K doens't like any altering of the BCLK.
I'm sitting at 4.5 Ghz right now, with only 1.25V, so there should be a little more headroom in that CPU, but so far I havn't yet managed to get anything above that stable.
The RAM frequency isn't that much of a concern anyways, I chose that kit also for it's low timings.
And low timings they are. I actually did get 13-14-14 on mine at 2666MHz. Wasn't too much to it either, it just worked. I consider it a good trade-off since 2800MHz wasn't viable.
4.5GHz on a 5930K is already beating the average, so you're on the good side of that chip already. I found on my 5820K that I needed nearly 1.32v to get 4.6GHz to even boot, so I stuck with 4.5GHz. You may have better luck (and much better cooling) so you could see 4.6+ on your chip. I know it isn't impossible, but it does beat the average by a large margin.
Well, the Kraken X61 is taking care of the cooling, and it does it quite well. I used the beQuiet silent base 800 case that Logan recently reviewed and it is indeed very silent but the airflow doesn't seem to be perfect. We'll see.
I guess I'll stick with the 2666 and try to get the Timings down a little more, too.
Thanks for the help anyways.