p750tm1-g w/ 8700k is way underperforming a p750dm-g w/6700k?

I'm kind of at a loss.

P750dm-g with a 6700k and 16gb of RAM died.

Bought a new p750tm1-g with 8700k and 32gb of RAM. Transferred SSDs and reinstalled the exact same OS and software. I optimized the OS for audio/DAW work per a few online guides. The only thing I am not able to do per those guides is change C-states/Turboboost because those options are not in the BIOS (my mistake, if I had known I would have purchased from HIDevolution instead of RJtech). But even still, I should not be having these kind of problems.

I use these as a DAW and the same files that were hitting the cpu ceiling on the 6700k are totally choking the 8700k. I can't play any of those files without disabling dozens of plugins.

Neither were/are overclocked. Anyone have an idea what the problem might be?

 

Hi there,

Please provide more information. You have not provided any average clock speeds, temperatures, performance comparisons etc.

Once you have provided this we could maybe guess at what is going on.

 

Thanks for the reply! I did a search for cpu benchmarks and used the first one I saw. See the pdf attached. Hardly anything is performing ok

 

Have you spoken to your reseller to guide you through the basics like checking power settings?

 

Yes. The CPU is being limited to the bus speed. Trying to figure out why

 

The difference in Audio Performance should be minimal... although in a lot of scenarios the 6700K should out perform the 8700K... Depends if your DAW uses Multi-Threading in the "best way possible" and also which type of work you do.

BUT if you can actually notice the difference something is not right with your system, install some kind of app that lets you monitor each core frequency, check if the cores are actually being pushed to max speed or not.

Check which power mode is selected on both CONTROL CENTER and Windows power management.
You can probably fine tune your CPU with a app like ThrottleStop.

 

Bus speed? The base clock is 100Mhz and the multiplier should work off that with only small variation on that 100Mhz.

 

Yes, CPU clock speed is limited to 800 mhz.

Throttlestop didn't alleviate the problem.

Reseller convinced me enabling uefi would fix it but now I can't get the OS installed because UEFI isn't seeing the hard drives, even though the bios is. I think the motherboard is defective. Grrrrrrrrrrr

 

No, you installed legacy/CSM on your OS. You cannot "switch" to UEFI and still boot. You need to reinstall the OS in UEFI mode, so windows boot manager handles the booting.

 

I was able to get the OS installed and reseller was correct, enabling uefi fixed the clocking problem. All is normal now!

 

It was probably more the re-install that did it, the CPU should still behave normally in CSM mode.

 

Actually the root cause is a BIOS bug. Disabling UEFI automatically enables CPU VR Custom Setting and limits current to 5 amps, causing massive CPU throttling. Going back into the OC menu and increasing the current limit, or disabling custom VR, restores CPU performance in CSM mode.

 

wow i had no idea. this is some crazy stuff right there

Sent from my Xiaomi Mi Max 2 (Oxygen) using Tapatalk

 

Wow, very interesting.

 

Yeah thank god, and @unclewebb for ThrottleStop. When I first got the laptop, I was stumped for several minutes trying to figure out why the CPU was stuck at 1GHZ under load and felt so sluggish. When I opened Limit Reasons in ThrottleStop and saw the EDP flags light up like a Christmas tree, that's when I knew to check the BIOS settings again.

 

so what are you hitting for overclocks on you 8600k?

 

4.6 all cores set in BIOS with no further tuning was fine, no throttling or thermal issues, but I haven't done more testing as I just had surgery.