Video streams and documentation in the lab: a customized OBS server with space for (almost) everything

1 - Introduction and Requirement Profile 2 - Intel or AMD? 3 - What is the purpose of a RAM disk? 4 - NAS Hard Drive for Storage 5 - Video Ccapturing and Encoding 6 - Summary and Conclusion

That little bit extra: a large RAM disk

Using a sufficiently large RAM disk as a temporary directory in Studio mode can be useful in many respects and effectively helps to protect the system SSD, especially if large amounts of temporary or volatile data are regularly generated. The advantages and conditions of this approach can be precisely categorized. First of all, the RAM disk fulfils the property of volatility, as it is completely erased every time the system is restarted or shut down, provided no persistence mechanisms are provided. This is ideal for typical temporary data such as intermediate render results, cache files from audio or video editing programs, working copies of large media files, temporary transcoding, decoding buffers or analysis protocols. By offloading this write-intensive and short-lived data to a RAM disk, the SSD is relieved of numerous write operations, which can increase the service life of the flash memory in the long term, especially if it is a system SSD with a limited TBW specification.

In studio operation, there are often many short-term write accesses, for example during real-time processing, temporary exports or analysis processes with several gigabytes of data that are no longer required once the work process is complete. If these are stored on the SSD, this not only results in additional write cycles, but also fragmentation, increased wear leveling effort and possibly a drop in performance at high fill rates or under load. A RAM disk completely avoids these problems, as it only uses the existing DRAM and does not wear out any memory cells. In addition, many RAM disk solutions offer very short access times and high IOPS, which brings noticeable advantages, especially with many small files.

Another positive aspect is the improved predictability of data flows. A RAM disk is either initialized empty or filled with predefined data at each system start and acts completely isolated from the rest of the mass storage. This allows temporary data paths to be clearly defined, for example by system-wide environment variables or by manual path definitions in programs. Many professional applications, including DAWs such as Pro Tools, Logic, Ableton or editing solutions such as DaVinci Resolve, offer configuration options for defining temporary working directories that can be easily redirected to a RAM disk.

However, the size of the RAM disk must be chosen appropriately. If it is too small and the target directory overflows, this can lead to crashes, data loss or unexpected application behavior. For video files, cache generation or intermediate exports, the maximum temporary memory requirement should therefore be analyzed in advance. Typically, the recommended size is 4 to 16 GB for audio applications, but can also require 32 GB or more for UHD video workflows. The available RAM capacity of the system must be generously dimensioned so that the main memory requirements of the regular applications do not conflict with the RAM disk volume. In the end, I opted for 24 GB because the clips do not significantly exceed the 1-hour limit anyway and not quite as much data is generated.

It can therefore be said that a RAM disk is an efficient means of protecting the SSD in studio operation, especially with temporarily generated, write-intensive work data. It increases performance, reduces wear on the SSD and supports a clear separation between persistent and volatile data. The prerequisite is an appropriate amount of RAM and a disciplined approach to data backup and export.

Corsair Vengeance DDR5 kit with 48 GB (2×24 GB)

The memory used is a Corsair Vengeance DDR5 kit with 48 GB (2×24 GB), model number CMH48GX5M2X8400C40. The CUDIMM kit is specified for a maximum data rate of DDR5-8400 MT/s and uses timings of 40-52-52-135 at an operating voltage of 1.40 V. A memory expansion of 48 GB instead of 64 GB can be quite sufficient and even useful in real-world use, provided the system requirements and workflows allow this. In my specific case, the focus is on a dedicated OBS server with several parallel video recordings, high buffer depth and late data transfer to a NAS. The storage load is high, but its structure is easy to plan.

The choice of a 2×24 GB DDR5 kit offers a functional advantage here: firstly, this configuration allows dual-channel operation without blocking other slots, and secondly, the total memory is significantly higher than classic 32 GB configurations, which is sufficient for larger RAM disks, cache handling and temporary file buffering. At the same time, the 48 GB limit avoids tying up unnecessary resources or risking more unstable behavior at high clock frequencies with a higher module density (such as 32 GB bars), especially when DDR5-8400 is used as in this case.

In addition, OBS itself and most capture and encoding processes are not memory-intensive in the classic sense, but rather rely on stable bandwidth and fast I/O response. Even with simultaneous recordings, buffers and export processes, the RAM requirement usually remains well below the 24 GB mark as long as no memory-intensive post-production, complex real-time filters or resource-intensive background processes are running in parallel. The rest is used for the RAM disk. In addition, DDR5 systems show that memory controllers and mainboard layouts often react more sensitively to being fully populated. If you want to achieve the highest possible clock rates, low latencies and stable timings in the long term, a well-tuned 2-DIMM kit such as the one with 48 GB is usually better than a fully occupied 64 GB kit, which is implemented using 4×16 GB or 2×32 GB modules that are more difficult to optimize.

Corsair’s modules are equipped with an aluminum heatspreader that bears the characteristic geometric pattern of the current Vengeance series. According to the label, the kit was manufactured in Taiwan and is aimed at users of high-performance Intel platforms such as LGA1851 (e.g. Core Ultra i5-235) who want to effectively utilize very high memory clock rates even with non-classical kit sizes such as 48 GB. The XMP profile version is 5.53.13, which indicates support for current platforms with corresponding BIOS compatibility.