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Hyperthreading for P3D. Yes or no?

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No problem at all, we are all here to learn and share. :happy:

- PC Hardware: AMD Ryzen 9 9950X3D //  Asus ROG Crosshair X870E HERO //  2x32Gb Corsair Dominator Titanium DDR5 6000MT/s CL30 //  ASUS ROG Strix GeForce RTX 4090 OC Edition // 4Tb Corsair NVMe M.2 MP600  //  Corsair 1600W PSU
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Re the original post..."What is the general consensus regarding HT usage for P3D?"... My own experience has been that, after many tests, with no AM value in the cfg, returns the smoothest and best performance, which incidentally, is what LM recommend 😉

Howard
MSI Mag B650 Tomahawk MB, Ryzen7-7800X3D CPU@5ghz, Arctic AIO II 360 cooler, Nvidia RTX4090 GPU, 32gb DDR5@6000Mhz, SSD/2Tb+SSD/500Gb+OS, Corsair 1000W PSU, LG Ultragear 48"4K, MFG Crosswinds, TQ6 Throttle, Fulcrum One Yoke
My FlightSim YouTube Channel: https://www.youtube.com/@skyhigh776

Recently completed a 9900k/2800ti build and simultaneously switched from FSX to P3D. Originally OC’d to 5.0 with -2 AVX offset with HT enabled, I was a litttle disappointed with microstutters compared to my ancient rig and FSX. Turned off HT (and boosted the OC to 5.1 while I was at it) - microstutters all but gone, very smooth.

As an aside, I have a Noctua DH-15, and it’s quite sufficient for my needs, and my chip was very easy to OC with Asus’ auto-tuning utility and little else. It’s stable running Prime 95 with voltage at about 1.28 at temps at 80 or less according to coretemp (that’s at 4.9 with the offset). I’m not saying Prime is the have all end all be all of stress testing, or that coretemp is 100% accurate (in almost every forum of any type I usually see any discussion of stress-testing or measurements devolve into “that’s not the best/most accurate way to...”), just that it’s at least a fair estimation and close enough for me to say I’m done tweaking and just want to fly. 5.1 at or around 1.3 is ok with me - don’t want to bother with trying to get a little less voltage or a little more clock.

Brian Johnson


i9-9900K (OC 5.0), ASUS ROG Maximus XI Hero Z390, Nvidia 2080Ti, 32 GB Corsair Vengeance 3000MHz, OS on Samsung 860 EVO 1TB M.2, P3D on SanDisk Ultra 3D NAND 2TB SSD
 

You had a 7700K?

Thanks
bs

AMD RYZEN 9 5900X 12 CORE CPU - ZOTAC RTX 3060Ti GPU - NZXT H510i ELITE CASE - EVO M.2 970 500GB DRIVE - 32GB XTREEM 4000 MEM - XPG GOLD 80+ 650 WATT PS - NZXT 280 HYBRID COOLER

Just dropped my core temps by 12C by disabling HT. on a 7700K.  At the same time the core multiplier went from 45 to 51.  P3D 4.4 is smooth as glass.

Cheers
bs 

Edited by bean_sprout

AMD RYZEN 9 5900X 12 CORE CPU - ZOTAC RTX 3060Ti GPU - NZXT H510i ELITE CASE - EVO M.2 970 500GB DRIVE - 32GB XTREEM 4000 MEM - XPG GOLD 80+ 650 WATT PS - NZXT 280 HYBRID COOLER

17 hours ago, WarpD said:

My core temp never gets above 50* C... with HT on.  Pretty sure that's a good temp.  

Mine on the 7700K were hitting 100C under load.  Without HT the temps are 85C but with a high clock - 5.1 ghz.

 

Cheers

AMD RYZEN 9 5900X 12 CORE CPU - ZOTAC RTX 3060Ti GPU - NZXT H510i ELITE CASE - EVO M.2 970 500GB DRIVE - 32GB XTREEM 4000 MEM - XPG GOLD 80+ 650 WATT PS - NZXT 280 HYBRID COOLER

17 hours ago, WarpD said:

My core temp never gets above 50* C... with HT on.  Pretty sure that's a good temp.  

Yes it is a good temp.

My 8700K runs a bit hotter than your's @ about 52C with HT on, but still well within the reasonable range.

IMHO running your CPU at temps north of 80C for extended periods of time is simply not good for the long term health of your processor. 

Scott

I swap out my hardware every 2 years.

Cheers
bs

AMD RYZEN 9 5900X 12 CORE CPU - ZOTAC RTX 3060Ti GPU - NZXT H510i ELITE CASE - EVO M.2 970 500GB DRIVE - 32GB XTREEM 4000 MEM - XPG GOLD 80+ 650 WATT PS - NZXT 280 HYBRID COOLER

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