Ryzen 3900X thread

KungFuSpaghetti · 10 Jun 2020 at 15:05

For everyone saying they are seeing 4.6ghz+ can you tell me if this is in actual games and apps? What does hwinfo64 show for max effective clocks, because my setup now I get lower cinebench scores as it jumps around cores for the single core test, but my max effective clock is just under 4.5ghz on 2 cores on my primary ccx.

Tee Hee Johnson · 11 Jun 2020 at 00:11

Any ideas all? BIOS has optimum settings loaded, results are consistent and the only thing changing between the runs are going from default RAM profile to the XMP profile (which enables 3600, 16, 16, 16, 36 and dram voltage to 1.35 (from 1.2)).

I get worse results with the better RAM profile, you can even see that the IF, Mem Controller and RAM speeds are in sync at 1800. I'm confused.

stock and stock

stock and 3600 RAM

Thanks all!

nutsnut · 11 Jun 2020 at 00:20

Those scores are within margin of error, and both are very good scores, I wouldn't worry about it.

Cinebench doesn't need fast ram.

Shac · 11 Jun 2020 at 02:16

Cinebench is all about the Cpu Speed changing to faster ram for Cinebench will get you negligible increase.

Tee Hee Johnson · 11 Jun 2020 at 11:05

Shac said:
Cinebench is all about the Cpu Speed changing to faster ram for Cinebench will get you negligible increase.

nutsnut said:
Those scores are within margin of error, and both are very good scores, I wouldn't worry about it.

Cinebench doesn't need fast ram.

I know, but what changing the ram does is that it brings down the CPU speed.

With ram at stock, the CPU manages to hit 4155mhz, but with the ram set to 3600 the CPU can only hit 4118mhz.

KungFuSpaghetti · 11 Jun 2020 at 12:18

Tee Hee Johnson said:
I know, but what changing the ram does is that it brings down the CPU speed.

With ram at stock, the CPU manages to hit 4155mhz, but with the ram set to 3600 the CPU can only hit 4118mhz.

Are you running stock voltage?

What is the CPU package power, as it could well be that 3600mhz ram is needing more voltage and throttling the CPU back a little. I had an issue with my AIO running really high temps, but then my CPU was pulling over 140w on a 105w chip. I set a manual voltage as advised on here and it's boosted performance and dropped temps dramatically.

Tee Hee Johnson · 11 Jun 2020 at 12:22

KungFuSpaghetti said:
Are you running stock voltage?

What is the CPU package power, as it could well be that 3600mhz ram is needing more voltage and throttling the CPU back a little. I had an issue with my AIO running really high temps, but then my CPU was pulling over 140w on a 105w chip. I set a manual voltage as advised on here and it's boosted performance and dropped temps dramatically.

I'm not too sure, this is simply with everything on auto. Literally the only change between the runs was enabling xmp 3600 on the ram.

KungFuSpaghetti · 11 Jun 2020 at 13:19

Check the max draw on the CPU then, it may be pulling massively excessive amounts of power like mine.

glnn_23 · 13 Jun 2020 at 04:27

Here's some settings I used when running RealBench.

https://i.imgur.com/04R5W2d.jpg

robj20 · 14 Jun 2020 at 12:20

Any recommendations for a board for one of these, not going to be overclocking, just want one that runs cool if possible I know some run hot on the VRMs.
Don't need WiFi.
Only need one M.2.

Ideally I'd wait for B550 bit i don't think it's going to offer me anything, unless the CPU will likely run better at stock on one over either an b450 or x570.

Memory wrist got my eyes on this stuff,
TEAM GROUP 8PACK RIPPED EDITION 16GB (2X8GB) DDR4 PC4-28800C14

IvanDobskey · 14 Jun 2020 at 13:03

robj20 said:
Any recommendations for a board for one of these, not going to be overclocking, just want one that runs cool if possible I know some run hot on the VRMs.
Don't need WiFi.
Only need one M.2.

Ideally I'd wait for B550 bit i don't think it's going to offer me anything, unless the CPU will likely run better at stock on one over either an b450 or x570.

Memory wrist got my eyes on this stuff,
TEAM GROUP 8PACK RIPPED EDITION 16GB (2X8GB) DDR4 PC4-28800C14

Very pleased with my Asus X570 TUF, great board. Well featured and rock solid.

robj20 · 14 Jun 2020 at 13:35

IvanDobskey said:
Very pleased with my Asus X570 TUF, great board. Well featured and rock solid.

Thanks and only £194 so keeps it at the now affordable end.

Rich43 · 14 Jun 2020 at 15:11

Can someone please try this video on 3900x, turned up to 8k 60fps and see if it plays smoothly on Ryzen?

https://www.youtube.com/watch?v=N1-Jmq7BLFE

Steedie · 14 Jun 2020 at 15:52

Rich43 said:
Can someone please try this video on 3900x, turned up to 8k 60fps and see if it plays smoothly on Ryzen?

https://www.youtube.com/watch?v=N1-Jmq7BLFE

Absolutely fine for me, mate

roddypoddy · 14 Jun 2020 at 17:20

Spot on

IvanDobskey · 14 Jun 2020 at 17:28

robj20 said:
Thanks and only £194 so keeps it at the now affordable end.

Paid £189 for mine, but I understand it has been as cheap as £160. For that price it's a bit of a bargain.

Shac · 14 Jun 2020 at 17:29

Confirmed playback as Smooth.
No hitches stutters etc.

Edit to add using 3900X

oldbanana · 14 Jun 2020 at 17:55

This video destroys my 2700x

breathe3asy · 14 Jun 2020 at 18:01

Smooth 60 for me, spectacular video

xtraLONG · 14 Jun 2020 at 18:23

Rich43 said:
Can someone please try this video on 3900x, turned up to 8k 60fps and see if it plays smoothly on Ryzen?

https://www.youtube.com/watch?v=N1-Jmq7BLFE

i'm getting a lot of frame skipping @8k.