NEW AM4 BIOSes as of March 6 2018

i'm not impressed by this bios, ram stability seems even worse than before. with this update 3200mhz is pretty unstable on my gflaresX.

Hmm. Interesting. I'll have to test that scenario on my system, since I haven't noticed any major issues in PUBG. These are the averages of five AIDA benchmark runs I've done on my current setup:

Memory Read: 46849.6 MB/s
Memory Write: 45354.4 MB/s
Memory Copy: 40837.8 MB/s
Memory Latency: 77.48 ns

L1 Cache Read: 459.156 GB/s
L1 Cache Write: 230.184 GB/s
L1 Cache Copy: 459.12 GB/s
L1 Cache Latency: 1.1 ns

L2 Cache Read: 433.8 GB/s
L2 Cache Write: 225.972 GB/s
L2 Cache Copy: 388.276 GB/s
L2 Cache Latency: 4.7 ns

L3 Cache Read: 306.972 GB/s
L3 Cache Write: 218.552 GB/s
L3 Cache Copy: 292.34 GB/s
L3 Cache Latency: 12.2 ns

Just based on these numbers, I should be experiencing similar or worse performance issues. It may be that I'm just not paying attention to occasional stutters or that I've just never used the map while looking through a scope. I'll take your word for the change in performance and transfer rate numbers, but the whole thing just seems odd and it would be interesting to know what the root cause is.


Edited by PetrolHead - 08 Mar 2018 at 10:52pm

Okay, so one test after each update. Every benchmark (Aida, 3DMark, Geekbench etc.) fluctuates by some amount between runs, so you should run the benchmark at least three times for each BIOS version to get some idea on how much the results differ between each run. You should also probably wait some time before running the benchmark after booting up, since there can be all sorts of stuff going on in the background even after you have access to your desktop.

Also, I didn't say the differences in speeds are marginal, but they may be explained by other things than the BIOS. The latency differences on the other hand look marginal, but you won't know for sure until you do several runs with the same exact setup. For example, back when I was experimenting with RAM timings, the L3 cache results could vary quite a bit (over 20% for transfer rates and even jumps from 12.2ns to 20ns for the latency).

I'm not on my personal computer right now, but I'll see if I can post some of my AIDA results later today, just to show more accurately what I mean. The results of course only apply to my system, but they might illustrate my point better.


Edited by PetrolHead - 08 Mar 2018 at 10:20pm

Handrox, the latency differences are more or less margin of error stuff. The benchmarked speeds can also vary from run to run depending on what the OS may or may not do in the background. Are these only samples from a larger set of test runs or did you just test once with each BIOS version?

I successfully flashed my AB350-ITX to P4.60 from 4.43 (beta).

This has a Ryzen 5 2400G. I found that the CPU is running measurably better with this BIOS, particularly in gaming, which is how this box is being used.