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AGESA Update (Microcode Update

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May 20, 2002
AMD AM4 microcode has been released.

According to overclock3d.net it:
  • AGESA update promises to fix several bugs with Ryzen, with the following being AMD's promised changes.
    1. We have reduced DRAM latency by approximately 6ns. This can result in higher performance for latency-sensitive applications.
    2. We resolved a condition where an unusual FMA3 code sequence could cause a system hang.
    3. We resolved the “overclock sleep bug” where an incorrect CPU frequency could be reported after resuming from S3 sleep.
    4. AMD Ryzen Master no longer requires the High-Precision Event Timer (HPET).

It was tested with an ASUS X370-Pro motherboard, using ASUS' Day-1 BIOS and their latest 0604 BIOS, which contains AMD's AGESA microcode update.

According to the article:

"Testing this motherboard with a wider range of memory kits, we found that we were able to boot our system with a larger variety of kits than we did at launch, though at this time it is hard to know whether ASUS' BIOS updates or AMD's AGESA code updates are responsible for this change. Perhaps it is a combination of both that have caused this improvement.

We would still advise Ryzen buyers to check your motherboard's QVL list for compatible memory, which should be updated frequently to showcase support for the newest memory kits.

Moving onto more general memory bandwidth testing we can see that this update has not been able to get any additional performance out of our 2666MHz memory, though the 6nm decrease in latency is a big decrease in itself. This is a 6% decrease in memory latency, which is a huge change for a simple BIOS update.

While a 6ns decrease in memory latency may not seem like a big deal to some, it is certainly an improvement that will make AMD's Ryzen architecture more competitive and a clear sign that AMD is not finished optimising Ryzen, with plans to issue more performance improving AGESA updates in the future.

In May AMD plans to issue a new update that will focus on memory overclocking, which is something that will certainly interest a lot of Ryzen users.

Closing thoughts

With Ryzen, AMD has not simply launched and forgotten about their product, with the company planning frequent updates to both hardware and software to improve their CPU performance across a wide range of applications.

AMD has already told us that they have shipped over 300 developer systems since launch and plan to deliver over 1000 by the end of 2017, clearly planning to get developers to optimise their products for Ryzen and create stronger ties to the software development industry.

It is clear that AMD wants to make Ryzen into an even better product, taking all criticisms seriously and fixing any problems as they are brought to light. Let's hope that AMD continues down this path, as it will certainly benefit both consumers and the company as a whole.

Please check your motherboard manufacturer's website to see if they have a new BIOS with AGESA update"

Article can be found HERE