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  Topic Review (Newest First)
03-27-2020 01:27 PM
Falkentyne
Quote: Originally Posted by Apothysis View Post
To anyone currently using the Maximus XI Apex: Increasing the VRM Switching Frequency can have a negative impact on your stability:

I encourage you to test this on your own to eliminate the possibility of my particular board being messed up, my setup was as follows:
50/47 Core/Cache, RAM @ JEDEC, Prime95 Small FFT AVX2 just below minimum stable voltage (at 500 KHz). I did the tests at LLC5 with Power Duty Control and Power Phase Control on Extreme.


You need to start this test with a switching frequency that does NOT crash threads nor generate CPU Cache L0 errors at all, and then go up.
If you're getting a BSOD, you're already past the unstable vcore point even long before that.
I don't know what auto sets, but I assume 300 or 400 khz is lowest? Use the lowest one and find the vcore where no crashes or L0's happen then start increasing the switching frequency.

BTW the same issue happens on the Aorus Master and Xtreme, also.

I also believe that if you keep Vcore LLC (Loadline calibration) at Intel spec (I believe this is level 2 on your board, which should be 1.6 mOhms), possibly in combination with Auto vcore or adaptive /offset (you will NEED to raise AC Loadline to 1.6 mOhms if you use such a weak LLC), higher switching frequencies will not worsen stability. You don't want to use a fixed vcore with Level 2 LLC since vdroop will be massive and AC Loadline won't save you. You would probably need a 1.4v+ bios set voltage to keep load vcore high enough.
03-27-2020 10:26 AM
Apothysis To anyone currently using the Maximus XI Apex: Increasing the VRM Switching Frequency can have a negative impact on your stability:

I encourage you to test this on your own to eliminate the possibility of my particular board being messed up, my setup was as follows:
50/47 Core/Cache, RAM @ JEDEC, Prime95 Small FFT AVX2 just below minimum stable voltage (at 500 KHz). I did the tests at LLC5 with Power Duty Control and Power Phase Control on Extreme.


03-26-2020 03:27 PM
Apothysis
Quote: Originally Posted by chibi View Post
Did you use the Rockitcool direct die bracket? Or another brand? Any before/after comparison?
Using Der8auers frame. I changed out a radiator, my fans and redid my entire loop so it's not a direct comparison, but I'd say the Optimus Foundation-block runs about 2-3c cooler than the EK Velocity Strike - lines up with the TPU-review. Sadly I didn't have a water temp monitor in my loop before to do a better comparison.
03-26-2020 10:33 AM
chibi
Quote: Originally Posted by Apothysis View Post
If you two still need some feedback on direct die on the Apex XI I've now had both an EK Velocity Strike and an Optimus Foundation block on mine, direct die, 0 issues

Did you use the Rockitcool direct die bracket? Or another brand? Any before/after comparison?
03-25-2020 02:39 PM
Apothysis
Quote: Originally Posted by KedarWolf View Post
Edit: what do you use for cooling your CPU with your Apex XI, @Jpmboy the capacitors around the CPU made direct die impossible with my velocity and heatkiller vi pro blocks. can I use the blocks if I don't delid my 9900ks? Or are the capacitors too high still.
Quote: Originally Posted by chibi View Post
Can you post pictures of where the issue is with direct die and water blocks? I have the Apex XI and 9900KS and am thinking about going direct die in the future.

If you two still need some feedback on direct die on the Apex XI I've now had both an EK Velocity Strike and an Optimus Foundation block on mine, direct die, 0 issues
02-25-2020 11:25 AM
Jpmboy
Quote: Originally Posted by jeffk View Post
No one ?
the hysteresis works from bios on the Apex X, Apex VI and R6EO here.
02-25-2020 04:34 AM
Shawnb99
Quote: Originally Posted by KedarWolf View Post
Never mind the Extreme question, on your Apex XI can you turn off the RAM RGB from the BIOS?



Oh, I'm going with the Apex XI, G.Skill 4800, the CL 17 if they are available by the second week of March or CL18 if not, and getting a 9900ks.

May the CPU lottery gods smile upon me, or can someone sacrifice a goat at least?



Edit: what do you use for cooling your CPU with your Apex XI, @Jpmboy the capacitors around the CPU made direct die impossible with my velocity and heatkiller vi pro blocks. can I use the blocks if I don't delid my 9900ks? Or are the capacitors too high still.


You have to use the goofy mount for the Heatkiller IV. If you go with the Optimus block you can mount it the normal way without issues.
Direct die or not the mounting is the same
02-25-2020 03:25 AM
jeffk
Quote: Originally Posted by jeffk View Post
Has anyone noticed that Q-fan Step up / down speed are completly ignored ? So the CPU Fan / Case fan are waving when the CPU temp spike just for second, when browsing for example.

(Q-fan Bios setting without AI suit)

No one ?
02-20-2020 12:29 PM
chibi
Quote: Originally Posted by KedarWolf View Post
Edit: what do you use for cooling your CPU with your Apex XI, @Jpmboy the capacitors around the CPU made direct die impossible with my velocity and heatkiller vi pro blocks. can I use the blocks if I don't delid my 9900ks? Or are the capacitors too high still.

Can you post pictures of where the issue is with direct die and water blocks? I have the Apex XI and 9900KS and am thinking about going direct die in the future.
02-19-2020 07:39 PM
Jpmboy
Quote: Originally Posted by KedarWolf View Post
Never mind the Extreme question, on your Apex XI can you turn off the RAM RGB from the BIOS?

Oh, I'm going with the Apex XI, G.Skill 4800, the CL 17 if they are available by the second week of March or CL18 if not, and getting a 9900ks.
May the CPU lottery gods smile upon me, or can someone sacrifice a goat at least?

Edit: what do you use for cooling your CPU with your Apex XI, @Jpmboy the capacitors around the CPU made direct die impossible with my velocity and heatkiller vi pro blocks. can I use the blocks if I don't delid my 9900ks? Or are the capacitors too high still.
Sorry Bro - My Max XI is playing an away game (with deployed nephew) and I have not had an Apex XI. I only have one 1151 board - the Apex X.
Check the dimensions of the New blocks from Optimus Cooling. realy high quality stuff with really clean machining. I'm running their V2 on the R6EO and it's really a top performer. I have their Foundation block - excellent stuff.
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