Ok Mat I just found out that the April version of 3.0 works but the version " E-Cycles_3.0_2021.1_alpha_20210607_win(CUDA)" is creating the crashing once I load the viewport in cycles mode.
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For E-Cycles_3.0_2021.1_alpha_20210607_win_lite_rtx , in the viewport if i select openimage denoise color+albedo it works it appears stableā¦ The moment i switch to just color for the denoise, it crashes to desktopā¦ dont know if thats of any help but it appears that instability is probably to do with viewport denoising.
ive been having a number of cuda errors on renders and thigns like entire tiles not renderingā¦ it seems pretty buggy.
Bestto wait for the final cycles X stable release I think.
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These are the settings are what is causing the crashing
is there a setting you recommend I change on a GTX?
Dont use Optix denoise it cant hold a candle to OIDN 1.4
I would try disable the viewport denoise all together and see how stable it is.
Nope still crashing, I turned off all the denoisers and it just crashes when I hit the viewport render.
Here is a video showing what is happening, keep in mind, this is after a driver update and a restart of the machine, no addons added or enabled, and loaded factory settings. The April version works great but this version is just not working.
Ok So Mat fixed the crash issues for 3.0 and E7, @bliblubli, the compositor is set incorrectly unless I am missing something when I activate Ai denoise and go to the compositor it seems there is a disconnect happening in the nodes, shouldnāt it be when you activate the Ai denoise it automatically connects everything?
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I saw thereās a big discount going on, but on the blender market the price is still 299 for the rtx versionā¦ how does it work? Is there a code?
try 777
As Mathieu stated in a mail
"E-Cycles in the best sold add-ons - Celebration sales!
Hello everyone! E-Cycles got itās 7 alpha released 7 days ago and is now the 7th most sold add-on with a hearth and 5 stars rating!
You can fire that with the coupon code 777 to get 77.7% off the version of your choice on the Blender Market! The offer will last 7 days!
Happy rendering!
Mathieu"
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I was probably still asleep while I read the email 
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Hi @Thesonofhendrix,
thank you for the report! Iāll have a look at that file asap. In the mean time, please ensure it fits on your GPU. NVidia only allows good performance with system memory on Quadro and Tesla GPUs.
Hi @dogdayfear and @judrake,
thank you for the report, it is fixed in the latest builds. E-Cycles 7 however focuses on speed for now qnd only has basics Blender denoising with a simple upgrade to OIDN 1.4. E-Cycles Pro 2.93 and 3.0 have the full E-Cycles AI-Denoiser feature set and image quality.
Hi @zigzack001,
E-Cycles 7 is the name of an E-Cycles branch focused on pure render speed. E-Cycles 3.0 on the other hand has a lot of professional features like Light groups and state of the art denoising techniques. E-Cycles 7 will be merged into E-Cycles when itās stable enough. I have a development branch of E-Cycles on top of Cycles X, but performance is better based on E-Cycles 7 for now and E-Cycles 7 supports volumes on top.
Hi @Thesonofhendrix,
thanks for the tests. There was a 2x slowdown in this build of E-Cycles due to a bug. New builds should be much faster. If the slowdown persists in your file, you are welcome to make a report on the Blender Market (āask a questionā button in the right panel).
Thanks to the thorough testing. I canāt reproduce the issue with the node not connected on my hand using the default startup file. For denoising, I recommend to use the standard E-Cycles builds, it offers much better results. E-Cycles 7 only has OIDN 1.4 while E-Cycles 3.0 and 2.93 have OIDN 1.4 and the E-Cycles AI-Denoiser, which allows for about 10x less samples.
E-Cycles got itās 7 alpha released 7 days ago and is now the 7th most sold add-on with a 
and 5 stars rating!
Thank you!
You can 
that with the coupon code 777 to get 77.7% off the version of your choice! The offer will last 7 days!
Happy rendering!
Mathieu
Rendered with E-Cycles this week:
https://twitter.com/vvinter_man/status/1403063044213727239
Robot Tiger Figure by Michael Weisheim Beresin
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@bliblubli can you please explain the option ācompatibility modeā before 2.93 it was old transparency. Is this the same things?
Can someone confirm that E-Cycles 7 doesnāt support displacement yet?
Iām running E-Cycles_7_alpha_20210609a_win_rtx(Optix)
Can anyone confirm that E-Cycles is still faster than Cycles-X and K-Cycles? I see the charts, but just donāt know. I hear from some they didnāt really see any speed up. Other say K-Cycles is faster and K-Cycles is going to be upgraded with Cycles X so it will remain faster. Iām also interested to know if E-Cycles works with displacement, hair, and if it crashes a lot. A while ago I had e-cycles, but it would crash if trying to render a lot of hair.