Dual Xeon Performance issues

Hi there!

I just built a new workstation PC here are my specs:
Dual Xeon e5 2630 v4 (10-cores each, 2.1GHz)
Supermicro board x10dai
128 ECC Ram
980ti videocard
4 512 SSDs
Cubase 8.5 Pro

My problem is the overall performance in cubase. If i try running 10-15 vst effects (waves, izotope, t-racks) the cpu meter spikes and I get audio dropouts. I put audio buffer to 2048 samples but still get the same results. On my old PC with i7 5820k i was able to get away with 40-50 tracks full of vst effects and with stereo out track with 5-6 mastering plugins. I always thought the dual xeon will outpower i7. I do heavy commercial film scoring with 3 slaves and upto 2000 instruments all in on template.
Is there any thing I could do to make the dual xeon worth it tp use in cubase 8.5 pro? Anyone will dual xeon setup please share how you confugered the system.
PS i dont have any antivirus or even internet connected to this pc so nothing else is interfering.
Any insights will be greatly appreciated.

Tim Blast

hi ,Tim . also to i has problem with dual xeon e 5 v4 2620 octacore .motherboard x10dai and 64 gb ram 2400 mhz. 3 ssd enterprise sata 3.
i think that our cubase 8.5 no run correctly with multicore .
is need disable hiper treading and perfomance turbo of core chip.
what a disappointment
you have new , latest for to resolve this issue . cubase in nex feature must do support for dual xeon multicore .is unic solution .
i think .


I would like to recommend to read these articles:
Optimization for Windows: https://www.steinberg.net/nc/en/support/knowledgebase_new/show_details/kb_show/optimizing-windows-for-daws.html
Hyper Threading and ASIO Guard: https://www.steinberg.net/nc/en/support/knowledgebase_new/show_details/kb_show/hyper-threading-and-asio-guard.html

You should see a difference, for example between the i7 5820k quoted by the OP and 2x E5 2620 - however, this might be smaller than you expect. Please, see this chart from Scan Audio: http://www.scanproaudio.info/wp-content/uploads/2015/03/Scan2015DPCchart.jpg. There is indeed better performance, but it is not proportional to the core count as many expect - indeed, it is 6 vs 20 cores, but the i7 clocks much higher than the E5 and 20 cores require more syncronisation, which can also degrade performance.

I’d check the power options and the BIOS, disabling the options listed in the first link I provided, like:
– C-States
– Enhanced Halt
– Turbo Boost
– And only if all else fails, Hyper Threading as well
Please, note that not all options may apply to your CPU and/or mainboard - in general, all options which trim CPU speed. It is also recommended to uninstall all monitoring / update clients from the mainboard’s manufacturer and install the needed drivers only (if it applies to the OS).

Some chipsets are also more sensitive to memory speed - although it’s impossible to get into the details here… a practical example: the E5 2620 supports memory types DDR4 1600/1866/2133 - using 2400MHz modules means that internal multiplication will occur, CPU does not always like this. Most often, higher core count will require careful configuration. Currently, Cubase supports up to 32 cores, in single and dual CPU configurations.