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ROG Crosshair VI overclocking thread - Page 1347

post #13461 of 16852
Mmm ok. smile.gif that looked weird to me.
post #13462 of 16852
Its a CPU-Z bug I have done it myself. His voltage is a good chunk higher. When my bugs it says 1.155v most of the time.
post #13463 of 16852
Got it. Yes CPUz is bonkers now.
post #13464 of 16852
Quote:
Originally Posted by Karagra View Post

Its a CPU-Z bug I have done it myself. His voltage is a good chunk higher. When my bugs it says 1.155v most of the time.

CPUz for me shows the same as hwinfo64 but im using the older version of cpuz, both under load show anywhere between 1.194-1.200v load, at idle its 1.250v.
    
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post #13465 of 16852
I'm definitely a Noob with BCLK and P-states, and the conflicting information on what is a safe 24/7 overclock, as well as the ambiguity on what can be trusted on the actual readings you see in measurements makes it hard to know what is acceptable. I have SenseMI disabled (Ryzen 1700) which I think is the correct setting. My current candidate for a 24/7 overclock is:

CPU at 3.9675 GHz on a 115 base clock.
Memory 3372.6 MHz with 14-14-14-14-34 timings.
I have CPU LLC at Level 5.

This is using Zenstates:



At idle my voltages and temperatures look like this:



Under stress testing my voltages and temperatures look like this:



I had understood at one point that the CPU (Tctl/Tdie) and the CPU Core Voltage (SVI2 TFN) were the most accurate.

Elmor in the 1st post, however, says "Most reliable sensor is the CPU sensor reading from SIO (listed under Crosshair VI Hero in HWInfo64)." I would think he is about as good a source as it gets.

So which numbers do you take as accurate?

Would you run my settings as your everyday configuration or are the volts and temps too much in your opinion?
post #13466 of 16852
Quote:
Originally Posted by CeltPC View Post

I'm definitely a Noob with BCLK and P-states, and the conflicting information on what is a safe 24/7 overclock, as well as the ambiguity on what can be trusted on the actual readings you see in measurements makes it hard to know what is acceptable. I have SenseMI disabled (Ryzen 1700) which I think is the correct setting. My current candidate for a 24/7 overclock is:

CPU at 3.9675 GHz on a 115 base clock.
Memory 3372.6 MHz with 14-14-14-14-34 timings.
I have CPU LLC at Level 5.

This is using Zenstates:



At idle my voltages and temperatures look like this:



Under stress testing my voltages and temperatures look like this:



I had understood at one point that the CPU (Tctl/Tdie) and the CPU Core Voltage (SVI2 TFN) were the most accurate.

Elmor in the 1st post, however, says "Most reliable sensor is the CPU sensor reading from SIO (listed under Crosshair VI Hero in HWInfo64)." I would think he is about as good a source as it gets.

So which numbers do you take as accurate?

Would you run my settings as your everyday configuration or are the volts and temps too much in your opinion?

With the vcore you're running now, LLC 5 isnt necessary; you should be able to run around 1.415 and LLC 2 or 3 to get the same 1.375 under load. This avoids potential overshoots but I dont necessarily believe these cause any issues at these voltages anyways. Lighter loads could be providing more voltage than necessary though. Right answer, I havent really seen a difference at this point. The SVI2 and SIO temps are related to one another (5° offset); I cant remember the exact rule but you use the lower of the two temps IIRC.
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post #13467 of 16852
I did some tests with 2x8GB and 4x8GB memory to see where it can do 3200-16 (with two) or 3200-18 (with four DIMMs).
2x8 need 48-68 Ohm ProcODT and 4x8 need less termiation resistance at 36-48 Ohm.

Memory is TridentZ F4-3200C16D-16GTZB 16-18-18-38. These are Hynix 25-nm M-die and your memory may need different resistance. Samsung is 20nm and may need higher termination resistance.
Two suggestions:
1. If you are stuck below 3200, vary both DDR voltage and ProcODT resistance to map out your sweet spot.
2. If you have Hynix memory start with 60 Ohm for two sticks or 43 Ohm for four sticks.
post #13468 of 16852
Quote:
Originally Posted by 1TM1 View Post

I did some tests with 2x8GB and 4x8GB memory to see where it can do 3200-16 (with two) or 3200-18 (with four DIMMs).
2x8 need 48-68 Ohm ProcODT and 4x8 need less termiation resistance at 36-48 Ohm.

Memory is TridentZ F4-3200C16D-16GTZB 16-18-18-38. These are Hynix 25-nm M-die and your memory may need different resistance. Samsung is 20nm and may need higher termination resistance.
Two suggestions:
1. If you are stuck below 3200, vary both DDR voltage and ProcODT resistance to map out your sweet spot.
2. If you have Hynix memory start with 60 Ohm for two sticks or 43 Ohm for four sticks.



i have F4-3000C16Q-32GTZR 4x8GB can i run this more than 2666 ? mine is also hynix i think
    
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post #13469 of 16852
Quote:
Originally Posted by bluej511 View Post

Quote:
Originally Posted by madweazl View Post

Except Mr. Hallock was very wrong in that regard, along with a couple other recommendation (e.g. not going over 80ohm ProcODT unless you had liquid cooling). 1.9v is much more realistic in regard to RAM upper limits.

Because anything with more ohms and voltage going thru it will get hotter then something with lower ohms. Think of it as resistance and voltage has to push thru it, if it flows freely wont get as hot as something that has to push thru. It's hard to understand but its why a cable with high resistance can get hotter then one with less.

Pretty sure though that 1.5v is the max for DRAM voltage from what ive seen online but thats online who knows how true it is. I think from what ive read is that 1.65 is the absolute MAX voltage for DDR4, DDR3 is even more.

I fear I have to comment here in two respects. First, where it applies (and that isn't the topic of procODT), power lost as heat goes as V^2/R, so more R means less heat.

Second, procODT resistance is used to better match the CPU to (or from) RAM transmission line impedance as loaded by the memory. Little power is being lost in this resistance. What is hoped for is a better looking waveform "eye" that allows the threshold circuit to discriminate between ones and zeros.
     
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post #13470 of 16852
@elmor

With 1107 finally being being released on the drivers page is there an estimation when the next BIOS will be posted here? Has AMD released the AGESA 1005 update yet, and if not do you know if they they be releasing it soon? I have not updated to 1107, but if it does not help me get my RAM running faster i am hoping that the 1005 AGESA will.
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