5930k @ 4.343 GHZ Rampage V Extreme With GSkill 64 GB RAM at 2692 MHZ

[email protected] GHZ Rampage V Extreme -G.Skill 64 GB RAM@2805 MHZ BIOS Screenshots

Here is my final stable settings. I'm using an H110i GT cpu cooler so you won't want to try those voltages in air. I get under 70C gaming or any other CPU intensive tasks and under 77C stress testing with RealBench 2.41.

Thanks for sharing!

You have changed quite a bit of things that likely would not be needed. For example,

*Integrated VR efficiency management - Performance mode only really helps with extreme cooling and clocks, not ambient clocking. this just keeps all power on all the time to the VRM.
*BCLK amplitude - your bclk is 101... not needed there at all.
*DRAM switching - not needed at your clocks.
*DRAM power phase control - again, not needed at those clocks.
*VCCIO/VTTDDR/VPPDDR - auto/default is fine.
* There are more...

In a nutshell, for that clockspeed, the only thing you would really need to touch is vcore. Memory is a different story in its voltage and timings, but otherwise, that is it. So I'm glad it works, this will be helpful, but there are a lot of things touched that more likely than not can just be left at auto.

Nice overclock, and thanks again!

There is one thing which you probably missed. Memory is not fully stable - channel B is not working ( RAM is not visible in slot B ) on your screenshot so it works like triple channel even though in system you will see all memory capacity. Run AIDA64 or similar bandwidth benchmark and you will see the difference.

I would set 125 bclk , 3000 memory clock 15-15-15 or 15-16-16 , command rate 1N 1.35V and check if it's working. If yes then tighten main timings to something like 14-15-15/14-15-16 1.35-1.40V.
Next work on cache clock as memory settings won't help much from that point.

LLC can stay at auto - it doesn't help much and it affects Input Voltage , so not the same as in previous Intel series
Set VCCSA to 1.0-1.05V - maybe that's why you have problems with memory ... also instability during boot can be related to memory settings. Can also try Rampage Tweak 1. Mode 2 is causing memory errors on my DDR4.
Other thing is Input Boot Voltage ... why 1.3V when stock is 1.8 ? .. leave it at auto or set 1.8-1.85V.

On Haswell-E are other rules than on 1150 Haswells. There is no need to keep cache ratio within 300-400MHz from cpu ratio. Actually you can set it even higher than CPU clock but in most cases 4.2GHz+ will require high voltage.

I took the advice of you both and now the PC boots properly, only change I did make was I had to keep memory 'Optimized' and not set on 'Standard' or it wouldn't boot. Thanks you to you both. I don't think even with the changes my RAM will run at 3000, can get it to 2800 though with 16-16-16-36 2T but like I said it runs faster at the slower speed with the 14-14-14-34 2T timings. I did leave the BCLK at 101 just for the slight boost to the CPU and memory speeds as I do better in benchmarks then at 4.3 GHZ and 2666 MHz on the memory with the same timings. If I run the memory at 1T I get crashes in Windows and errors in Memtest86 but I haven't tried since changing the settings as you both suggested. Needs further testing but i worked 11 hours today and no energy to do so now. Oh, and the memory not showing in the screenshot was due to the boot instability, it now finds the full 64 GB and all channels.

My final completely stable settings. If i use the 100 strap/101 BCLK one channel of memory wouldn't be detected like you said. Is the CPU cache voltage too high? If I had it on Auto it went over a crazy 1.5v. And how high can I go if I want to overclock the cache more. Have to have it on that to boot. Tried memory at 14-14-14-34 1T and Memtest86+ froze. Also tried 3000 at 16-16-16-36 2T and wouldn't boot. I'm happy though, is pretty good for having 64 GB RAM and the voltages are more reasonable.

If you are using the latest BIOS from ASUS website then you have to set cache voltage manually. BIOS has a bug and is setting it to 1.5V+ instead of 1.15V+.
Cache overclocking depends from CPU. Some need 1.3V to make 4.2GHz , some won't make 4GHz at 1.4V. This you have to check by yourself.

Regarding memory OC, I think you can make 3000+ if it's Hynix based kit but it can be tricky as 64GB kit will need additional adjustments in sub timings and maybe other options. Simply you won't see any performance gain but can waste a lot of time and it still won't guarantee full stability.

Woomack said:

If you are using the latest BIOS from ASUS website then you have to set cache voltage manually. BIOS has a bug and is setting it to 1.5V+ instead of 1.15V+.
Cache overclocking depends from CPU. Some need 1.3V to make 4.2GHz , some won't make 4GHz at 1.4V. This you have to check by yourself.

Regarding memory OC, I think you can make 3000+ if it's Hynix based kit but it can be tricky as 64GB kit will need additional adjustments in sub timings and maybe other options. Simply you won't see any performance gain but can waste a lot of time and it still won't guarantee full stability.

Click to expand...

I just read playing with the System Agent Voltage is the best way to get DDR4 running at 3000 MHZ, some people are hitting it at 1.15v etc according to a memory overclocking guide, worth a try. I'm at work right now but will check it out when I get home. Hoping to get 15-15-15-35 2T at 3000 MHZ. I've had no luck running it at 1T tried again last night and I'm not sure adjusting the System Agent voltage would help that. Another guide I read says 1T is really hard to attain with 64 GB of RAM.

How are you cooling that beast?

DaveB said:

How are you cooling that beast?

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Been using a Corsair H100i but getting a Corsair H110i GT tomorrow in the mail. And no amount of tweaking will get me to 3000 MHZ on the RAM, hoping for higher CPU clocks with the new cooler tomorrow though.

- - - Updated - - -

Woomack said:

If you are using the latest BIOS from ASUS website then you have to set cache voltage manually. BIOS has a bug and is setting it to 1.5V+ instead of 1.15V+.
Cache overclocking depends from CPU. Some need 1.3V to make 4.2GHz , some won't make 4GHz at 1.4V. This you have to check by yourself.

Regarding memory OC, I think you can make 3000+ if it's Hynix based kit but it can be tricky as 64GB kit will need additional adjustments in sub timings and maybe other options. Simply you won't see any performance gain but can waste a lot of time and it still won't guarantee full stability.

Click to expand...

Can you suggest how to adjust the sub-timings? Can't find any info on that.

not sure the trivial upgrade in cooiing will yield more clocks...the difference between them isn't that much...

WolvenShadow said:

Can you suggest how to adjust the sub-timings? Can't find any info on that.

Click to expand...

There are no rules or guides how to do it on every available memory.
Best is to set auto or XMP at 2133 clock , write down timings , set 2666 at auto timings and check which are going up. At 3000 these timings will probably go higher ( higher = slower but usually more stable ).

At 3000+ you can try high tRFC like 380-450. Most other secondary timings can stay at auto. Command Rate 2 will give you stability but on this platform maybe 1 will work too. I had no chance to oc 64GB DDR4 above 3000 so I don't have any special tips for that.
You may need higher VCCSA voltage but no more than 1.1V.