Going to OC my CPU and undervolt GPU

Minibiker

Minibiker

Minibiker

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Bristolian living in Swindon
Hi all

As the title says, I'm going to OC my CPU and Undervolt my GPU, what is the best way to test stability and benchmark the system, I was using Heaven benchmark but wondered if there's a better one to use?

How long do you test everything once it's all stable?

Cheers
 
play games and see what happens. you could use furmark and superposition but they can pass that and still crash in games.

use the auto undervolt feature and see how that goes first.
 
Agree with what @Ross Thomson is saying, load up your pc with games or processing intensive stuff until it's pretty much 100% GPU or 100% CPU usage, don't do both at the same time until later on, will give you and good indicator of stability.

If they pass both 100% usage (In this case I would suggest that you check that the entire GPU Memory is loaded up as well, or nearly loaded up; don't just check for stability at certain GPU speeds, the last thing you want to find out later on is there's a memory issue on your GPU) for extended periods of time, then your final testing should be to run your system to 100% (or near that) for the CPU AND the GPU (maximise the memory usage) at the same time. This will also stress the entire system and the PSU. If there's any weak spots, each stage will tell you where you will need to do something about.

CPU test will be for your CPU and RAM. Adjust voltages and speeds as necessary.
GPU test will be for your GPU stability and whether there's any issue on delivery of power to the GPU and whether there's any memory errors (which sometimes can be missed as the memory isn't all used normally). Adjust voltages and speeds as necessary.
CPU + GPU test will find whether your cooling is adequate, and whether your PSU is not up for the job (if the blue/black screens or freezes). Adjust cooling as necessary. Obtain new PSU when you have budget/availability of suitable PSU if the PSU is having issues. (I found myself with this last issue lately)

It's a slow process, but it should net you a stable overclocked and cool system after its all done.
 
Undervolted the GPU down little notches at a time all seemed stable at 940mv, went through benches and few games of fifa no issues at all, fired up PUBG today and it crashed (black screen) so I upped the voltage to 950 and same again, after about 15 mins of PUBG (black screens)

Any thoughts on this guys?
 
Minibiker said:
I've took it up a few.. Its just because wherever I read most people get it stable at 930mv but I'm guessing all cards are different
Click to expand...

I'm afraid that's true of all equipment. I have a 4930k that loves low volts, but as it is fully loaded (all 8 banks of RAM, which most people don't have with their system), the commonly provided advice goes out the window. Now to use 4.3Ghz, I need more volts to the CPU, 1.28v instead of 1.13v at 4.2Ghz, and needing 1.38v for 4.5Ghz. Whilst most say 1.3v for 4.5Ghz. Overclocking nowadays is finding what your equipment can handle, any suggestions should be taken as that only; a suggestion. A place to start. But not necessarily something that can be replicated on your setup.

Anyway, it sounds like you're on your way to getting it stable, it'll take a bit more time, but once you do, cool, quiet and fully powered. :)
 
Meddling-Monk said:
I'm afraid that's true of all equipment. I have a 4930k that loves low volts, but as it is fully loaded (all 8 banks of RAM, which most people don't have with their system), the commonly provided advice goes out the window. Now to use 4.3Ghz, I need more volts to the CPU, 1.28v instead of 1.13v at 4.2Ghz, and needing 1.38v for 4.5Ghz. Whilst most say 1.3v for 4.5Ghz. Overclocking nowadays is finding what your equipment can handle, any suggestions should be taken as that only; a suggestion. A place to start. But not necessarily something that can be replicated on your setup.

Anyway, it sounds like you're on your way to getting it stable, it'll take a bit more time, but once you do, cool, quiet and fully powered. :)
Click to expand...

I guess it's just a case of keep knocking it up until it's stable in games and benchmarks.. Can I only go up 10mv at a time or can you go smaller
 
Minibiker said:
I guess it's just a case of keep knocking it up until it's stable in games and benchmarks.. Can I only go up 10mv at a time or can you go smaller
Click to expand...

Typically, I do an "averaging" setup process; So if you're at 930mv, I up a bit more (in chunks of x2 or x4 of the lowest amount, so 10mv or 20mv if the lowest step is 5mv, or two steps forward, one step back), and then see if stable or not. And if tested OK, then reduce by half (the step back) and test again. And keep going as required. Since going by smaller amounts will take a LOT longer to narrow down the stable point. You want steps to be able to easily and quickly narrow down too. Who knows? You might have an actual Golden Sample (or a really bad sample) of something and the volts needed are silly low (or silly high), and if you took it by the smallest steps all the time, you'd have a LONG(ER) time getting there before you even get to test it for stability.

But no, nothing stopping you from taking smaller steps towards your target if you should so desire. :)
 
Meddling-Monk said:
Typically, I do an "averaging" setup process; So if you're at 930mv, I up a bit more (in chunks of x2 or x4 of the lowest amount, so 10mv or 20mv if the lowest step is 5mv, or two steps forward, one step back), and then see if stable or not. And if tested OK, then reduce by half (the step back) and test again. And keep going as required. Since going by smaller amounts will take a LOT longer to narrow down the stable point. You want steps to be able to easily and quickly narrow down too. Who knows? You might have an actual Golden Sample (or a really bad sample) of something and the volts needed are silly low (or silly high), and if you took it by the smallest steps all the time, you'd have a LONG(ER) time getting there before you even get to test it for stability.

But no, nothing stopping you from taking smaller steps towards your target if you should so desire. :)
Click to expand...

I understand Cheers bud... I'll try upping another 10 see if that helps it, if not just keep climbing, stock voltage was 1024mv
 
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