Open case panel and let a fan blow air in. That's how I fix heating issues 😁

My cat batted my RAM stick. Should have known they are attracted to laser lights 😞

6 hours ago, Greazer said:

Open case panel and let a fan blow air in. That's how I fix heating issues 😁

That's what I've been doing up to now, but I think it needs a little extra help.

7 hours ago, Greazer said:

Open case panel and let a fan blow air in. That's how I fix heating issues 😁

My watercooling solution isn't as effective as I'd like...

 

JayzTwoCents found a better cheap cooling method: https://youtu.be/M5rkxxqzKRk?feature=shared&t=1020 😆

 

Seriously though, there's some great advice in this thread.

Edited September 9, 20232 yr by F737MAX

9 hours ago, Fielder said:

If you're going to optimize in bios, then Steve 86 message has a good video to follow.

EDIT: that video was for a different cpu. this is probably more to the point. Just a simple voltage reduction. Very conservative.

 

For a few years, I always run "core temp" which boots up when the computer is turned on. It is tiny and uses almost no resources. A little window shows the cpu temp. It hides in the taskbar.

Thanks again Fielder.  I have used coretemp to monitor my cpu temp in the task bar for many years.  I use afterburner to show my gpu temp in the taskbar as well so I am always very aware of my temperatures.

One minor thing people need to keep in mind; you can't compare X3D temps to 'normal' CPUs 1:1, due to the design. An X3D CPU will happily hit its throttle max and it's not a problem and it's actually meant to do it under heavy loads.

Normally you have the CPU die right under the IHS (Integrated heat spreader, i.e the little lid on the CPU), which means the heat goes straight into the IHS and then into the cooler to be dissipated, thus there's less travel and surface between the die and the cooler.

However, the X3D CPUs have the entire cache layer sitting on top of the die, so that's a big space and buffer where heat is harder to dissipate in the same manner. So the 7800X3D for example, will easily hit 83c* its throttle max and sit there under max loads but the second you stop, the heat also plummets much, much faster. The X3D CPUs ARE efficient, low TDP chips but can still output some big temperature numbers because the die is further away from the IHS.

So heat numbers aren't really 1:1 comparable to Intel chips or even non-X3D AMD chips.

That said, hitting throttle max of even an X3D CPU when in a game, means something is wrong for sure.

Ryzen 7 5800X3D

So, I decided to quit undervolting cpu with debug-cli pbo tuner. And instead to undervolt in BIOS. So I clicked the Reset button in pbo tuner to go back to stock voltage. And rebooted to Bios (Asus motherboard bios)

--

Main screen: D.O.C.P. off => on (tunes the PC system Ram).

Advanced screen: Resize Bar off=>on (harness full gpu memory). Thanks to cianpars!

AI twweaker:

   VDDR CPU VOLTAGE: AUTO => OFFSET MODE (enables changing cpu core voltage)

   VDDR CPU OFFSET SIGN: => - (new values will be subtracted from the voltage)

   VDDR OFFSET VOLTAGE: 0.195 (decrease cpu core voltage 0.195 volts)

EZ MODE

SAVE & EXIT

(changes shown as -.2000 instead of .1950)

Note reducing voltage .195 was done in 4 steps of .05. and then booting windows after each of  the 4. I ran OCCT Stability Test after each reduction.

Before these changes, occt app showed voltage about 1.26 and temps about 71.5 during the 30 minute test.

after reducing in four steps to end up with -.200 volts offset from normal in BIOS, it showed this at 29:32 into the 30 minute test:

58.9 C temp instead of 71.5.... reduced about 12 C

1.00 volt  instead of 1.26 volt

Test screen showing 100% usage all 8 real cores and about 110% all 8  hyperthread cores. A heavy 30 minute test!

I have had no problems with stability in MSFS and may have been lucky in silicon lottery. Because I  can reduce volts a full .20 without problems.

Edited September 9, 20232 yr by Fielder

14 hours ago, Sethos said:

One minor thing people need to keep in mind; you can't compare X3D temps to 'normal' CPUs 1:1, due to the design. An X3D CPU will happily hit its throttle max and it's not a problem and it's actually meant to do it under heavy loads.

Normally you have the CPU die right under the IHS (Integrated heat spreader, i.e the little lid on the CPU), which means the heat goes straight into the IHS and then into the cooler to be dissipated, thus there's less travel and surface between the die and the cooler.

However, the X3D CPUs have the entire cache layer sitting on top of the die, so that's a big space and buffer where heat is harder to dissipate in the same manner... can still output some big temperature numbers because the die is further away from the IHS.

So heat numbers aren't really 1:1 comparable to Intel chips or even non-X3D AMD chips.

 

Thanks. I didn't know that 3 or 4 days ago when installing my new X3D CPU. I thought the increased temps (about 9 degrees) was perhaps because of the new seal with silicon heat paste was not as perfect. But I guess it's the reason you wrote instead! By watts, I was not expecting this temperature rise.

I tuned the temps back down more or less because I thought it necessary. It does not reduce performance to undervolt tune (so I'm told), only reduces  temps.

Thanks for all the info and advice guys, a fantastic response and lots of ideas to experiment with.

I particularly like your simple 4 step bios approach Fielder though I'm not sure I can take the credit for enabling the resizable bar 😀

15 minutes ago, cianpars said:

 

 

Edited September 10, 20232 yr by cianpars
Meant to be an edit, not a new post

16 minutes ago, cianpars said:

Thanks for all the info and advice guys, a fantastic response and lots of ideas to experiment with.

I particularly like your simple 4 step bios approach Fielder though I'm not sure I can take the credit for enabling the resizable bar 😀

Does Rebar do anything currently? The last time I tested it (by forcing it with nVidia profile inspector more than a year ago) the performance was slightly worse than with Rebar off...

10 hours ago, Fielder said:

Ryzen 7 5800X3D

  58.9 C temp instead of 71.5.... reduced about 12 C

1.00 volt  instead of 1.26 volt

Test screen showing 100% usage all 8 real cores and about 110% all 8  hyperthread cores. A heavy 30 minute test!

I have had no problems with stability in MSFS and may have been lucky in silicon lottery. Because I  can reduce volts a full .20 without problems.

Excellent result for a 5800X3D! 1.00 V is impressive, it runs at the same voltage as my 7800X3D.

With my CPU I can run -20 offset all-core and do that 30 min stability test at steady 4.7 GHz / 70 W / 60 °C! But I have a 360 mm AIO and the 7800X3D PP is 5 nm. In game it boosts at 5050 MHz all the time.

I don't actually know if Rebar does anything. I only turned it on 2 days ago.

I'm running single H60 Corsair 120mm cooler with a Noctua fan replacing the Corsair fan which I never installed. Because I wanted a high speed exhaust fan. BIOS says the Noctua radiator fan runs at 4200 rpm at 100%. It's loud (but I don't mind).

 

8 minutes ago, MrFuzzy said:

Does Rebar do anything currently? The last time I tested it (by forcing it with nVidia profile inspector more than a year ago) the performance was slightly worse than with Rebar off...

Excellent result for a 5800X3D! 1.00 V is impressive, it runs at the same voltage as my 7800X3D.

With my CPU I can run -20 offset all-core and do that 30 min stability test at steady 4.7 GHz / 70 W / 60 °C! But I have a 360 mm AIO and the 7800X3D PP is 5 nm. In game it boosts at 5050 MHz all the time.

very interesting info for me this , i have a 5800x3d on a strix at the moment and planning in the next month or so to go 7800x3d on a carbon wifi , i have 280 artic freezer II  in the roof as iam not keen on front mounted radiators and cant fit a 360 in the roof , if i can get similar results to you i will be more than happy. Not that iam happy now if you know what i mean lol 5800x3d/4090. people will say iam pretty stupid to upgrade but that's what i like doing 

1 hour ago, sonny147 said:

if i can get similar results to you i will be more than happy.

The 5050 MHz frequency in game is granted even if you get the worst 7800X3D on the market, silicon wise 🙂

The upgrade makes sense, don't worry, especially having a 4090. 

 

 

 

Does undervolting help performance at all?  My temps run a little high even with water cooling (usually high 60s in heavy areas but less otherwise) but nowhere near what would be considered bad.  If i can squeeze some performance out of it I may try but otherwise not sure I want to mess with it.

Edited September 10, 20232 yr by sfgiants13