New data suggests that AMD Ryzen processors have problems with FMA3 instructions, causing the processor to crash.

AMD Ryzen problems do not end, since according to some users of the HWBot forum, there are very specific processes that end up blocking certain workloads. This blocking is not intermittent, but is continuous and constant under very specific tasks, something that we must add to the list of problems reported under AMD Ryzen, which at this point are already a few, such as incomplete BIOSes, memory latencies L3 cache, Windows 10 issues, and performance issues in some games.

To certify that this problem is not due to a specific motherboard, the test has been carried out on several motherboards and these users have reported problems in each case and with all AMD Ryzen processors on the market. The frequencies of these processors have not been changed, and the power settings have not been changed. Another of the tests carried out has been with overclocking in the processor, and it has been detected that the processors, curiously, are completely stable.

These issues only affect the FMA3 instructions, which are optimized for Bulldozer, Sandy Bridge, Haswell, and Skylake processors, but apparently not for the Zen architecture processors on which AMD Ryzen processors are based and apparently this is where the problem is. problem. AMD has confirmed this problem and that a motherboard firmware update is required to resolve it.

According to the data, the problem is based on the power management of the FPU units of the Zen processors, which would explain that the overclocked processors are not affected by receiving an increase in voltage and therefore consumption, so do not they are affected by using more energy to function. These problems are normal in an architecture that has been developed from scratch and that arrives prematurely. These problems will be solved little by little, with BIOS, firmware and driver updates.

Source: overclock3d