Medieval Nerd Posted June 20, 2015 Share Posted June 20, 2015 Howdy there, When I looked at what my board was set to, it's currently set at 1.55db by default, should I fiddle with it to see if pushing it a bit further could help with cache overclocking? Or is that value already considered 'high'? Thanks, Link to comment Share on other sites More sharing options...
emissary42 Posted June 20, 2015 Share Posted June 20, 2015 What cache & memory ratio are at right now? Usually you don't have to mess with those settings yourself, but they might help vs boot-problems at higher cache ratios (1.55 is ok for 4.2GHz uncore). Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 20, 2015 Author Share Posted June 20, 2015 What cache & memory ratio are at right now? Usually you don't have to mess with those settings yourself, but they might help vs boot-problems at higher cache ratios (1.55 is ok for 4.2GHz uncore). I'd like to achieve parity with my Core clock, so 4.5Ghz each. When I started to raise the Cache clock, after 4.2Ghz it doesn't matter how much voltage I give the cache, it just won't remain stable or boot. A kind soul pointed me towards an overclocking guide, but it's more geared towards LN2 cooling, where they make a big fuss about talking about the 'cold bug'. In the guide, they say the upper limit for Transmitter CLK De-emphasis should be 1.55db, because of cold bugs. (Again assuming this is LN2 cooling related) Link to comment Share on other sites More sharing options...
Marlena13 Posted June 24, 2015 Share Posted June 24, 2015 great topic Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 25, 2015 Author Share Posted June 25, 2015 great topic I was hoping to get a bit more information about what are 'safe' or 'normal' ranges for the Transmitter CLK De-emphasis. No idea what ranges are acceptable. Considering the guide I have is for LN2 cooling, it's obsession with avoiding the 'cold bug' is not really an issue for me, and it was the forewarning with using values above 1.55db (which is what I'm at currently). I guess I'll experiment and let you fine people know whether or not I managed to get parity with my core clock. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 26, 2015 Author Share Posted June 26, 2015 Finally! Parity with Core & Cache clock works! I simply bumped the TCDE value to 1.6db, I was finally able to boot up at 4.5Ghz Cache clock. I do have to fiddle with the voltages to make it 100% stable for stress tests, but being able to boot is definitely a step in the right direction! :) So if you aren't running on LN2 you can use that value to give yourself more headroom for Cache OC. Take note that this value does empede on your Core Clock OC headroom. So if you reach a temperature limit with your core clock, there is a good chance you can increase the TCDE without losing anything. But if your Core clock is limited by your system stability period, then you shouldn't increase TCDE as that will make it even less stable. Hope this helps, I wish I understand more of each of the numerous settings and what impact they have. So much to learn. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 27, 2015 Author Share Posted June 27, 2015 Ok, small update. After doing some tests with TCDE value without pushing my cache clock above 4.2, I saw that at 1.64db I wasn't getting any hangs. So switched to tweaking the cache, put it at 4.5Ghz, with 1.375 voltage And... seems like it's holding! Managed to run Firestrike without any issues, and a few short AIDA64 tests. Tomorrow I'll try out even higher TCDE values and see where the threshold lies for having the core clock at 4.5Ghz. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 28, 2015 Author Share Posted June 28, 2015 So it seems that around 1.64db I'm getting weird 'power off' events. Where my PSU just simply shuts down. After hours of tests I'm settling for 1.60db with 4.3Ghz cache core @ 1.380v. I'll do more tests later today or tomorrow. Cheers, Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 29, 2015 Author Share Posted June 29, 2015 So more benchmarks, more tests. So out of the blue, I went to have a look at the BIOS for my motherboard. And well, well, I'm like 3-4 versions behind with 2 of them focusing on system stability. Let's just say I didn't hesitate long to flash my board. So after spending time trying to put my settings back to what they were before the flash. I noticed that the core is seemingly less voltage hungry now. Manged to lower it to 1.280 still stable. But I started this thread about the darn Cache Clock. Right now I'm at 4.5Ghz @ 1.360V, with the TCDE @ 1.64db. I think I finally nailed it down, now it's time for multiple stress tests and some gaming sessions to see if it holds. Hope this will help fellow LGA2011V3 users who are trying to bump up their cache clock. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 30, 2015 Author Share Posted June 30, 2015 And more tests. TCDE 1.63750 Vcore 1.330 Vcache 1.80 CPU X 45 CACHE X 45 So the above managed to survive a 1 hour AIDA64 system stability test. But the next day I was randomly gaming while watching a video and boom. Hang... I think trying to shave off the TCDE wasn't a good idea but I'll keep it like this while raising the voltages if I hang again. If i reach something like 1.395 cache, i'll put it back to 1.64db. One thing for sure with the cache clock at 4.5ghz it seems impossible to get 4.6ghz Core Clock stable on my chip. :( Here's a summary of various settings I tried up to date: 4.5Ghz Test #1 TCDE 1.64062 Vcore 1.280 Vcache 1.350 CPU X45 CCH X45 4.5Ghz Test #2 TCDE 1.64062 Vcore 1.285 Vcache 1.365 CPU X45 CCH X45 4.5Ghz Test #3 TCDE 1.64062 Vcore 1.290 Vcache 1.370 CPU X45 CCH X45 4.5Ghz Test #4 TCDE 1.64062 Vcore 1.300 Vcache 1.375 CPU X45 CCH X45 4.5Ghz Test #5 TCDE 1.64062 Vcore 1.315 Vcache 1.375 CPU X45 CCH X45 4.5Ghz Test #6 TCDE 1.65000 Vcore 1.315 Vcache 1.375 CPU X45 CCH X45 4.5Ghz Test #7 (1 Hour A64 Run) TCDE 1.63750 TDDE 1.3 TODE 1.0 Vcore 1.330 Vcache 1.380 CPU X45 CCH X45 4.5Ghz Test #8 TCDE 1.63750 TDDE 1.3 TODE 1.0 Vcore 1.335 Vcache 1.385 CPU X45 CCH X45 If I can get 4.5 on both I'll call it a day. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted June 30, 2015 Author Share Posted June 30, 2015 Oh the rage, the unbounded rage of pushing OC to it's limits. Seems that tugging too much on the TCDE is causing weird instability issues, so I'd probably have to understand all those countless Transmitter/Receiver settings in order to not only tweak that one and pray that the 'auto' settings adapt accordingly. (noticed that on each boot it's not always the same (the auto values for certain settings). So I give up for now... If anybody knows more extensively or has some interesting links about these more complex settings please share I'd love to read up more on this. So that I'm not working the dark so much balancing values that might be off blancing others. Vcore 1.325 Vcache 1.350 CPU X45 CCH X42 <--- :( Link to comment Share on other sites More sharing options...
Medieval Nerd Posted July 2, 2015 Author Share Posted July 2, 2015 So, I've come with the hard conclusion that my chip is quite uncooperative with anything above 4.5Ghz. So I've started experimenting how the new X99-A BIOS 1801 stability patches had on voltage requirements. And I'm a bit surprised at what I'm starting to notice. Right now I'm factoring out the Cache clock just to see voltages requirements for the Core Clock. Right now I'm running at 4.5Ghz at 1.280v. Benchmarks and gaming stress tests are holding. Considering how my chip is able to run at such low voltage at 4.5Ghz, it's a dead giveaway that it's pretty much it's limit. Luck of the bin I guess. Even at 1.395 or 1.420 core voltage couldn't manage to keep it stable at 4.6Ghz. Link to comment Share on other sites More sharing options...
Medieval Nerd Posted July 14, 2015 Author Share Posted July 14, 2015 The darn pump in my H240X died again... Rest in Peace Red Kraken. A new beast will emerge from your ashes... T_T Link to comment Share on other sites More sharing options...
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