Latency under Windows and OSX

RME HDSPe AIO Pro Latency

RME HDSPe AIO Pro – Latency under Windows and OSX

Which operating system offers the lowest latency for your DAW when using an RME Card?

We tested the RME HDSPe AIO Pro under OSX and Windows 10. The PCI-E card was installed in a Sonnet Tech TB3 Echo Express SE I chassis. We haven’t tested RTL with the card installed directly in the PC’s PCI-E slot but since Thunderbolt has direct access to the PCI-E bus there shouldn’t be a performance hit. RME has confirmed this as well.

OSX (10.15.7)
32: 159 sample/3.605 ms
64: 223 samples/5.057 ms
128: 351 samples/7.959 ms
256: 607 samples/13.764 ms
512: 1119 samples/25.374 ms

Win 10 (20H2)
32: 111 samples/2.517 ms
64: 175 samples/3.968 ms
128:303 samples/6.871 ms
256:559 samples/12.676 ms
512:1071 samples/24.286 ms

Based on our tests Windows 10 seems to have a 1ms advantage over OSX. 1ms of latency isn’t really enough to give one platform a significant edge over the other. The bigger advantage Windows has over OSX for Cubase Pro  users is Direct ASIO hardware monitoring from directly in the DAW. This eliminates latency when tracking at higher buffer settings and allows you to forget about the Totalmix application when tracking. That said, we’ve been able to track in Cubase and Pro Tools at a 64 sample buffer without any perceived latency under OSX.

** Oblique Audio’s RTL Utility was used in our testing at 44.1khz. 

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