AMD News Archives
AMD Firmware Update To Bring Boost Performance Optimizations

There has been a lot of talk recently of AMD Ryzen 3000 series processors reportedly not hitting their boost clock frequencies, whether stock coolers are adequate for hitting the boost frequencies, and other concerns around the boost behavior on these new Zen 2 processors. AMD issued a statement today they are rolling out a new BIOS/firmware update to help with boost clock frequency optimizations.

3 September 2019 - Hitting Boost Frequencies - 28 Comments
AMD Ryzen 9 3900X Power Usage Is Running Measurably Higher On Linux Than Windows

Frequently brought up following our various Ryzen 3000 "Zen 2" benchmarks like the Ryzen 9 3900X vs. Core i9 9900K gaming benchmarks is how the Ryzen 9 3900X is pulling considerably more power than the similarly equipped Intel Core i9 system and those numbers are higher than what is often cited by Windows reviewers as the difference. I've begun investigating that power difference and indeed quite quickly could see Linux power usage being higher than Windows 10.

30 August 2019 - Ryzen 9 3900X - 36 Comments
AMD Renoir Graphics Power Management Gets Wired Up

While AMD's next-gen Renoir APUs are Vega-based and not Navi, beyond the initial Linux driver enablement seen over the past few weeks coming out a few days ago were a set of patches just getting the power management in order.

26 August 2019 - Renoir APU - Add A Comment
Linux 5.3 Kernel Yielding The Best Performance Yet For AMD EPYC "Rome" CPU Performance

Among many different Linux/open-source benchmarks being worked on for the AMD EPYC "Rome" processors now that our initial launch benchmarks are out of the way are Linux distribution comparisons, checking out the BSD compatibility, and more. Some tests I wrapped up this weekend were seeing how recent Linux kernel releases perform on the AMD EPYC 7742 64-core / 128-thread processors.

17 August 2019 - AMD EPYC 7742 2P - 13 Comments
AMD Bulldozer/Jaguar CPUs Will No Longer Advertise RdRand Support Under Linux

Not directly related to the recent AMD Zen 2 BIOS update needed to fix an RdRand problem (though somewhat related in that the original systemd bug report for faulty AMD RdRand stems from these earlier CPUs), but AMD has now decided to no longer advertise RdRand support for Family 15h (Bulldozer) and Family 16h (Jaguar) processors under Linux.

15 August 2019 - AMD RdRand Issue With BIOS - 24 Comments
AMD Ryzen 3000 Series Playing Nicely With Latest Linux Distros Following BIOS Updates

One month ago we were told that AMD released a BIOS fix to their motherboard partners for addressing the systemd boot issue with Ryzen 3000 series processors that stems from an RdRand instruction issue. Finally over the past week we've seen motherboard vendors pushing out BIOS updates for the prominent motherboards and indeed this takes care of the issue.

12 August 2019 - Systemd RdRand Issue Fixed - 23 Comments
AMD Sends Out Initial Linux Driver Support For "Renoir" APUs

AMD is striking well over the past month with their Linux hardware bring-up. In the past month we've seen the Navi 10/12/14 support get in order for Linux as well as support for the future Vega-based Arcturus GPU and now we see the initial enablement patches for their next-generation APUs, Renoir.

9 August 2019 - AMD Renoir - 38 Comments
Summing Up The AMD EPYC 7742 2P Performance In One Graphic

If you didn't have a chance since last night to check out our benchmarks of the AMD EPYC 7742 and EPYC 7502 Linux performance, I certainly encourage you to do so. Even if you aren't a server enthusiast, it's incredible to see the engineering achievement of AMD with Zen 2 and how the race is certainly back on in the CPU space. If you are short on time, here's the quick summary of our initial AMD EPYC 7002 benchmark results.

8 August 2019 - 7742 vs. 7601 vs. Xeon Platinum 8280 - 23 Comments
How Can AMD EPYC "Rome" 7002 Series Be Even Better? Open-Source BIOS / Coreboot

By now you've likely seen the fantastic performance out of AMD's new "Rome" 7002 series processors. The performance is phenomenal and generally blowing well past Intel's Xeon Cascade Lake processors. So that's all good and it can get even better outside of performance: I asked AMD about the prospects of Coreboot / open-source BIOS support and got a surprising response.

8 August 2019 - Open-Sourcing Rome? - 28 Comments
AMD Optimizing C/C++ Compiler 2.0 Released With Zen 2 Support

Coinciding with yesterday's glorious AMD EPYC "Rome" 7002 series CPU launch, AMD's software folks released AOCC 2.0 as their LLVM/Clang-based compiler optimized for Zen processors. AOCC 2.0 brings optimized compiler support now for Zen 2 processors not just only the EPYC 7002 line-up but also the Ryzen 3000 series consumer processors.

8 August 2019 - AMD AOCC 2.0 - 4 Comments
AMD Ryzen 9 3900X SMT Linux Performance Benchmarks

For those wondering what the SMT performance impact is for new Zen 2 processors, here are some tests done using a Ryzen 9 3900X with Ubuntu Linux when testing at the default 12-core / 24-threads and then again when disabling SMT to look at just the twelve physical cores.

1 August 2019 - Ryzen 9 3900X Benchmarks - 20 Comments
Linux 5.2/5.3 Kernel Performance On The AMD Ryzen 9 3900X

With yesterday's Windows 10 vs. Ubuntu 18.04 LTS Linux benchmarks for the AMD Ryzen 9 3900X, some suggested that the Linux performance could have been better if using a Linux 5.x kernel. Well, here are some benchmarks comparing the performance of Ubuntu 18.04.2 LTS with its Linux 4.18 kernel compared to Linux 5.2 stable as well as the brand new Linux 5.3 development kernel.

27 July 2019 - Ryzen 9 3900X Linux Kernel Benchmarks - 12 Comments
GCC 10 Compiler Picks Up New Scheduler Model & Cost Tables For AMD Zen 2 Processors

While AMD developers published their "Znver2" compiler patches for Zen 2 originally back in November, months ahead of the recent Ryzen 3000 series launch, this compiler support was incomplete as it re-used the existing scheduler model and costs table of Znver1. Now though one of SUSE's compiler experts who often works in cooperation with AMD has published the new Znver2 scheduler model and costs table for Zen 2.

23 July 2019 - GCC 10: Better Zen 2 - 3 Comments
ASUS ROG CROSSHAIR VIII HERO Testing On Ubuntu 18.04 Linux

For those in the market for an AMD X570 high-end motherboard for use with the new Zen 2 processors, the ASUS ROG CROSSHAIR VIII HERO was one of the boards sent out as part of the reviewer's kit and it's been working out quite well.

15 July 2019 - ASUS ROG CROSSHAIR VIII HERO - 25 Comments
AMD Picasso Support For Coreboot Appears Finally Ready

Back in April I wrote about Coreboot seeing AMD Picasso APU enablement work as the first Zen/Ryzen processor target being handled by this open-source BIOS alternative. It now looks like that Picasso support is all squared away and ready for use by future AMD-powered Google Chromebooks.

13 July 2019 - AMD Picasso + Coreboot - 7 Comments
AMD Posts New CPUFreq Driver For CPPC Support With Zen 2 CPUs

AMD Zen 2 CPUs support ACPI's Collaborative Processor Performance Control (CPPC) for tuning the system to energy and/or performance requirements. AMD has now published a new CPUfreq driver for handling their CPPC implementation and the new controls found with their new processors.

10 July 2019 - Collaborative Processor Performance - 15 Comments

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