• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

AMD Ryzen 7 9800X3D

keyser van someone said:
The power and temps don't add up on TechPowerup.
Gaming power and gaming temps:
7800X3D 46W 69.2C
9800X3D 65W 60.8C

"Temperature testing on this page uses air-cooling, for consistency and to show comparable results. All performance testing on the other pages is done using an Arctic Cooling Liquid Freezer III liquid cooling solution that keeps temperatures well below all limits, to ensure there is no thermal throttling."

edit: ok LTT review explains, more power draw but better temps. I have some reading/watching to do :)

Click to expand...


Different architecture
 
Last edited:
keyser van someone said:
The power and temps don't add up on TechPowerup.
Gaming power and gaming temps:
7800X3D 46W 69.2C
9800X3D 65W 60.8C

"Temperature testing on this page uses air-cooling, for consistency and to show comparable results. All performance testing on the other pages is done using an Arctic Cooling Liquid Freezer III liquid cooling solution that keeps temperatures well below all limits, to ensure there is no thermal throttling."
Click to expand...

- the layout is flipped upside down for 9800x3d compared to 7800x3d
- the position of the many temp sensors were also moved
- wattage / temperature is not equal when so many things changed

Just as speculation, the chips being right next to the cpu cooler instead of being buried under the cache can mean heat is being sucked away faster despite using more power, thus a lower temperature.
 
Last edited:
JollyJamma said:
“They flipped it around so x3d cache gets more heat instead of the cores”

So I’m confused by those two statements then
Click to expand...

The x3d cache isn't as sensitive to the heat as the cores

This inversion of the 3D V-Cache stack has the obvious advantage of the CCD's thermals behaving like they do on the regular Ryzen 9000 series processors without 3D V-Cache. There should be a marked improvement in heat transfer from the CPU cores to the STIM and IHS, which is how AMD was able to increase the base frequency significantly. Then there's also how Zen 5 X3D is said to now have the same overclocking capabilities as the regular 9000-series processors.
 
Last edited:
uscool said:
The x3d cache isn't as sensitive to the heat as the cores
Click to expand...
It's more that the 3D cache was insulating the cores. Most of the heat generation comes from the CCD.

Technically it was easier to put the cache on top of the CCD for 1st gen but it meant TDP was limited and clocks had to be locked.

This is a good video on it:

 
Last edited:
If AMD used a 120w TDP on the 7800x3d it would have toasted the CPU cores that sat the bottom - probably 100c easy

Now that the CPU core is at the top it's much easier to deal with, pump 120w and still only 65c and you can go higher without issue, temps remain reasonable up to 180w if you want to push it
 
Last edited:
Also "screw it just move the temp sensors" genius :) It's a good chip! and expensive. It will be good to have the new Nvidia GPUs in a few months and really see what they can do. I've got life costs getting in the way (boo) but maybe at some point next year I might upgrade, or wait for a game to come out that needs a reason to upgrade.
 
Absolutely FILTHY 1% lows, look at that! Crossing that magical 120 fps threshold finally. I wish someone would test Troy Total War and max out the grass, that was an absolutely murderous setting on CPUs. Sad no reviewers kept up with it.

45foNw4.jpg
 
You must log in or register to reply here.
Back
Top Bottom