02-09-2015
04:57 AM
- last edited on
03-06-2024
03:37 AM
by
ROGBot
02-09-2015 07:25 AM
BenTed wrote:
So I have a 5960x on a Rampage V ex.
With G Skill 2666mhz ram. When i enable XMP it puts the BLCK to 125.
So i have some questions if anyone would be really nice to help me please.
So BLCK 125x34=4.250Ghz
I can't get my system to over clock much higher without going above 1.3v.
Am I correct in thinking at 1.3v on good water cooling with 4 rads is about right?
Or could i go 1.35v for 24/7 use safely?
BenTed wrote:
Also does BLCK 125 push the system much?
it seems that allot of people are reporting instability with a BLCK of 125?
BenTed wrote:
Another thing is... If I use BLCK 125 does that totally disable the usage of adaptive v core?
When I tried adaptive with BLCK 125 the system would not even post but at BLCK 100 it's fine.
Is only offset available at BLCK 125?
02-09-2015 08:33 AM
02-09-2015 12:21 PM
MeanMachine wrote:
Hi BenTed and its BCLK which stands for Baseclock. A slight typo, not BLCK, and the 5960X has a base clock of 3.0GHz
MeanMachine wrote:
The OC procedure for multiplier based overclocking is as follows:
BCLK or base clock influences the CPU clock but also the memory, usb ports, sata ports etc..
Leave base clock (bus) for what it is right now for better initial stability however, (if you enable memory XMP at 2400 MHz or higher, your base clock will jump to 125 MHz ).
MeanMachine wrote:
Set your multiplier to your liking: 100MHz x 44 = 4400 MHz or 125MHz x 37 = 4625 MHz (if you have XMP enabled - you will be defaulted to a 125 MHz bus)
The integrated memory controller (IMC) inside of the CPU is going to get overclocked as you increase BCLK, and it will likely be what limits your OC.
MeanMachine wrote:
Therefore, as you try to overclock BCLK, the VTT voltage(aka IMC) is what you'll need to increase.
MeanMachine wrote:
Increase CPU voltage and (though setting AUTO might work fine), apply 1.3V on the processor to reach 4100 MHz and you may need up to 1.4 Volts to reach ~ 4.5GHz. I don't recommend going over 1.3V if you want longevity.
You will need to make sure your processor is properly liquid cooled when exceeding 1.3V. and constantly monitor temperature during stress testing as sustained high temps (above 85c) can degrade your CPU.
MeanMachine wrote:
200 is usually pretty easy to do for BCLK and most systems can usually overclock BCLK to around 205-210, and if you're lucky, maybe in the 210-220 range as the IMC on some CPUs are better than others. The Intel Lottery.
It is best to establish a stable OC at say 4.5GHz , (stress tested using Realbench 1hr and no arbitrary Bios settings) before tweaking further.
Save profiles as you go and don't go for the top OC in one hit, creep up on your target slowly in small increments.
MeanMachine wrote:
Adaptive Voltage, dynamically changes the voltage according to load, while Manual mode is static and best left to normal for everyday usage.
MeanMachine wrote:
Hope that answers some of what you need and Happy OCing.
02-09-2015 07:23 PM
BenTed wrote:
So is 2666Mhz on RAM possible at BCLK 100? Yes but not easily, and with stability.
How will this effect the system at that ram frequency and is BCLK 125 just a must for such ram frequencies?
The Bios will change the base clock frequency.
If so, what is the top ram speed before for DDR4 before the BCLK would need to be moved from 100 to 125?
I cant answer that.
You can use CPUz to obtain the XMP profile for your DIMMs, this can then be entered statically or chosen from the drop menu in Bios. (not 100% sure as I don't have your Bios)
I know based on BLCK 100 for 4.3Ghz OC it would be 100x43. But how do you get there with BLCK 125 for a 4.3Ghz OC?
Simple mathematics: 4300 divide 125 = 34.4
Is there a BIOS code for this indicating so? Also what is the best way to increase this? Also how far can you push this voltage for VTT?
Would VTT be "CPU SystemAgent Voltage?
VTT (aka IMC, QPI/VTT, QPI/DRAM)
VTT goes by many names depending on which motherboard you have, but it is the voltage for the Integrated Memory Controller (IMC) inside of the CPU. This controller speaks directly with the RAM, and as you increase the system's base clock rate ( BCLK), the IMC frequency also increases, so you'll have to up this voltage as you up BCLK.
For a full explanation of system voltages, go here: http://www.overclock.net/t/583211/voltage-guide-for-core-i7
Yer I have allot of cooling... 4 radiators. Things are kept pretty cool indeed.
But is there not an intel recommended max voltage for 24/7 usage as the OC I end up at will be my daily usage OC.
I believe the absolute maximum (as specified by Intel) is 1.4 V.
But playing with BLCK would not help lower volts needed to reach a higher OC on CPU right? The volts needed to hit a OC won't change... am I correct there?
Lets put it this way, The more you increase frequency with RAM or CPU, the more voltage will be required to obtain stability and the more heat will be generated. Just a small increase in voltage will substantially increase the raise in temperature, hence the need for stress testing and constant monitoring, using CoreTemp or HWMonitor.
Would I use the stress test in real bench or the benchmark or 1hr?
Use Realbench to stress test the CPU for 1hr, if OK then run the benchmark to compare with others on the leader board.
I usually try to use adaptive to preserve the OC for longer. Rather than pumping a consistent higher than spec voltage into the chip all the time. Have it ramp up and down as I'm not always using the processor to 100 usage.
When you say "normal" do you mean statically set?
Processor usage can be set in windows by adjusting your power plan.
MM
02-09-2015 04:21 PM