This guide is designed to help you choose the optimum NETINT Video Processing Unit (VPU) for your encoding workflow.
As an overview, note that all NETINT hardware products (VPUs and transcoders) run the same basic software controlled via FFmpeg and GStreamer patches or an SDK. This includes load balancing of all encoding resources in a server. In addition, both generations are similar in terms of latency and HDR support.
Question 1. Which ASIC Architecture: Codensity G4 (Logan) or Codensity G5 (Quadra)?
Tables 1 and 2 show the similarities and differences between Codensity G4 ASIC-powered products (T408 and T432) and Codensity G5-based products (Quadra T1U, T1A, T2A). Both architectures are available in either the U.2 or AIC form factor, the latter all half-height half-length (HHHL) configurations.
From a codec perspective, the main difference is that G5-based products support AV1 encoding and VP9 decoding. In terms of throughput, G5-based products offer four times the throughput but cost roughly three times more than G4, making the cost per output stream similar but with greater stream densities per host server. G5 power consumption is roughly 3x higher per ASIC than G4, but the throughput is 4x, making power consumption per stream lower.
Table 1. Codec support, throughput, and power consumption.
Table 2 covers other hardware features. From an encoding perspective, G5-based products enable tuning of quality and throughput to match your applications, while quality and throughput are fixed for G4-based products. The G5’s quality ceiling is higher than the G4, at the cost of throughput, and the quality floor is lower, with an option for higher throughput.
G5-based products are much more capable hardware-wise, performing scaling, overlay, and audio compression and offer AI processing of 15 TOPS for T1U and 18 TOPS for T1A (36 TOPS T2A). In contrast, G4-based products scale, overlay, and encode audio via the host CPU and offer no AI processing. You can read about Quadra’s AI capability here.
Peer-to-peer DMA is a feature that allows G5-based products to communicate directly with some specific GPUs, which is particularly useful in cloud gaming. This is only available on G5-based products. Learn about peer-to-peer DMA here.
Table 2. Advanced hardware functionality.
- Codensity G4 and G5-based VPUs offer similar cost-per-stream, with Quadra slightly more efficient on a watts-per-stream basis. Both products transcode to H.264 and HEVC formats (G5 encodes to AV1 and decodes VP9).
- Choose G4-based products for:
- The absolute lowest overall cost
- Compatibility with existing G4-based encoding stacks
- Interactive same resolution-in/out productions (minimum scaling and overlay)
- Choose G5-based products for:
- AV1 output
- AI integration
- Applications that need quality and throughput tuning
- Applications that involve scaling and overlay
- Maximum throughput from a single server
- Cloud gaming
Question 2: Which G4-based Product?
This section discusses your G4-based options shown in Figure 1, with the U.2-based T408 in the background and AIC-form factor T432 in the foreground. These products are designated as Transcoders since this is their primary hardware-based function.
Figure 1. The NETINT T408 in the back, T432 in the front.
Table 3 identifies the key differences between NETINT’s two G4-based VPUs, the T408, which includes a single G4 ASIC in a U.2 form factor, and the T432, which includes four G4 ASICS in an AIC half-height half-length configuration.
Table 3. NETINT’s two G4-based products.
- The U.2-based T408 offers the best available density for installing units into a 1RU server.
- The AIC-based T432 is the best option for computers without U.2 connections and for maximum server chassis density.
Question 3: Which G5-based Product?
Figure 2 identifies the three Quadra G5-based products, with the U.2-based T1U in the back, the AIC-based T1A in the middle, and the AIC-based T2A in the front. These products are designated Video Processing Units, or VPUs, because their hardware functionality extends far beyond simple transcoding.
Figure 2. The Quadra T1U in the back, T1A in the middle, and T2A in front.
Table 3 identifies the key differences between NETINT’s three G5-based VPUs:
- The T1U includes a single G5 ASIC in a U.2 form factor.
- The T1A includes a single G5 ASIC in an AIC half-height half-length configuration.
- The T2A includes two G5 ASICs in an AIC half-height half-length configuration.
Table 4. NETINT’s two G4-based products.
- The U.2-based Quadra T1U offers the best density for installing in a 1RU server.
- The Quadra T2A offers the best density for AIC-based installation and is ideal for cloud gaming servers that need peer-to-peer DMA communication with GPUs.
- The AIC-based Quadra T1A is the most affordable AIC option for installs that don’t need maximum density.
Question 4: VPU or Server?
NETINT offers two video servers that use the same Supermicro 1114S-WN10RT server chassis; the Logan Video Server contains ten T408 U.2 VPUs, while the Quadra Video Server contains ten Quadra T1U VPUs. Servers offer a turnkey option for fast and simple deployment.
An advantage of buying a NETINT Video Server is all components, including CPU, RAM, hard drive, OS, and software versions, have been extensively tested for compatibility, stability, and performance, making them the easiest and fastest way to transition from software to hardware encoding.
As for the choice between servers, your answer to question 1 should guide your selection.
If you have any questions about any products, please contact us here.