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GN BTS #4: Piecemeal Render Rig (Multi-GPU for Blender)

2018-02-07
everyone this is a patreon behind-the-scenes video but we're gonna be releasing it to the main channel I don't know a week or two later so what we're looking at today for those of you who have early access is a completed version of the system that I built for Andrew our main video guy does most of the editing and film work so Andrew also does all kinds of blender 3d animation stuff working in Unreal Engine which are all things that require a pretty decently powerful computer we have another video where I built the system this is basically the completed system after we finished the air flow arrangement and all of that stuff added a second video card of an older generation because blender doesn't care about SLI it cares about individual work units present each one being a video card and they can work independently of each other pretty well so this is the finalized build we just finished putting it together I want to point out what we ended up doing for everything so for for explaining how this type of rig works and yours on a pretty bad laptop right now that's gonna change though if it's 650 M and an old i7 and what we have here is an r7 1700 I really want to overclock this to 4 gigahertz but we can't because the motherboard was a gaming 5 X 370 board has a severe issue where it seems to be pushing the voltage to 1.5 v no matter what which is insane and will kill the CPU so for now we're not overclocked until I can figure out why that's happening I've notified gigabyte and then other than that we're not really using the CPU to render any way we're using GPUs because they're just better at this particular type of rendering and although it's nice to have the back of if we need it so we have a 1070 Ti going for the primary and then another GP here this is just a 960 that I had and don't need anymore it's a 2 gigabyte 960 so adding this card reduced our render time in the test by about 22% which is pretty damn good especially for an older architecture so 20% faster we are on a scale of of minutes versus dozens of minutes for the old laptop so it's a huge improvement in terms of the airflow we thought this through pretty pretty well so basically this is an inverter case power supplies up here the power supply is helping pull air out from the video cards after they get heated they're technically in conflicts for air however the power supply is really just pulling out like warmed air exhausts you know so that's good it's not under a ton of load anyway so it doesn't really need to worry about getting too hot we have fan down here just an extra one I had 120 that's pushing air over the VRMs and into the back plate of the GPU which is helping out the rear fan for exhaust and then another front fan here so this fans entire life is to push air up in front of the 140 millimeter fan on the front over here so that that fan can have extra access to air and push it through the video cards even in spite of the dead zone from the hub so the Cooling's actually worked out really well in this case this card when both are running rendering like they are right now with the door closed this card gets something like 62 degrees under Auto fan settings and we're not controlling for it cuz it's not really relevant and then this one's like 52 so temperatures are actually very good in here for memory we have to 16 gigabytes tix 32 gigabytes total 3200 megahertz of memory Corsair lpx stuff and that's like a gold mine right now as is this video card sadly but that's the nature of the industry so that's most the build we did swap out the power supply for a thermal take one and and we end up going with this air cooler for the cooler but I think that now pretty much wraps the build so overall very happy with how it came out it should be a beast for rendering especially relative to what he had going on there are things we could improve in the future but for blender primarily those are all going to be adding more GPUs of higher power class so given the state of the market right now we're not going to do that because I need my cards for testing but that's a good start so for the future maybe that's something to look into if cards ever come down in price a but for now either way adding a 960 was 22% faster than just the 1070 TI so that's something that is surprisingly helpful for an older car that's not worth a whole lot anymore except for the mining thing going on that's it though the case is a 600 see if you curious a couple years old reviewed it ages ago and liked it a lot actually and yeah if you do not have early access to this video if you're watching it on the main gamers Nexus channel then you can get early access next time by going to patreon.com/scishow and access the $5 and up tier gets access to the behind-the-scenes vlogs not all of them go public only a couple of them do some remain private to only patreon backers some of them go public on a side channel where you won't be notified about it unless you're subscribed there so but everyone on patreon gets it for five and up basically so that's the deal anyway subscribe for more as always and patreon.com slash gamers Nexus tell us that directly I'll see you all next time
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