Vray RT GPU : Thermal behavior when using cuda units

[arnaudg]

I wonder what is the thermal GPU behavior when it is full load rendering under Vray RT gpu mode.
It is comparable than, let's say an in-game situation (like crysis or whatever ...) ?
Or it is less intensive ?
I plan to use a couple of nividia GTX 460 in a silent case with also an i7 980X @ 4Ghz baby so I try to estimate the requirements, it is going to be hot !

Thanks

[kein_plan]

hi, rendering in gpu mode is real full load for the gpu. i would say it´s more intensive than gaming. i tried to get 2 gtx 460 and the i7 950@3,6ghz in my machine. but the upper gpu became very hot after only five minutes of rendering. about 95 C. i think you need some water there, if you want to run them in one case...

[vlado]

Proper cooling is very important, especially if you have more than one card. Rendering on the GPU typically places higher load on the GPUs than a game.

Best regards,
Vlado

[Dariusz Makowski (Dadal)]

I dunno if thats for every1 but my GPU's stay were cold... I got gtx 480 and 8800gts. And they both got less temp than in Games...

[vlado]

Mine are quite a bit hotter

Best regards,
Vlado

[arnaudg]

Well, I'm front of a dilemma , some say it is running hotter than game some say it is running cooler ...

If I need To watercool, I'm becoming a nerd

It's a complex , expensive , time consuming operation and if I can avoid it, I will be fine

Maybe if it's running too hot I can lower my cpu overclock a little and reduce a bit the frequency on the GPUs

The Choice of Gforce GTX 460 was originally done for that, They run way cooler that the gtx 480

look at this interesting test :

GeForce GTX 460 SLI : http://www.behardware.com/articles/7...teristics.html




GeForce GTX 480 SLI : http://www.behardware.com/articles/7...teristics.html






the test have been performed with 3Dmark running.
a comment I found with Google on SETI forums report that when cuda running full load it may run hotter than game full load between 0 and +4 °C

http://webcache.googleusercontent.com/search?q=cache:2n3itbB9HFMJ:128.32.18.150/forum_thread.php%3Fid%3D51812+The+card+idles+aroun d+73-74C,+typically+under+load+playing+a+3d+game+I+reac h+80C.+In+regard+to+running+CUDA,+it%27s+not+alway s+at+84C,+it+fluctuates+between+80-84&cd=2&hl=fr&ct=clnk&gl=fr&lr=lang_en|lang_fr&cli ent=firefox-a


Tell me what you think !

The rig I plan to build is for now :

* i7 980X @4Ghz (around) with noctua NH-D14 ( http://www.clubic.com/actualite-3089...re-noctua.html)
* motherboard: Asus P6X58D Premium ( http://www.bit-tech.net/hardware/mot...board-review/1 )
* SLI: 2x Gainward GeForce GTX 460 Golden Sample - 2Go ( http://www.ldlc.com/fiche/PB00104376.html )
* PSU: 850W Corsair CMPSU-850HX ( http://www.pixmania.com/fr/fr/308823...hx850w-85.html )
* Case : Lian-Li PC-B25S http://www.ginjfo.com/Publics/Dossiers/Boitier-PC-B25S-de-Lian-Li-249-Boitiers.jpg.html High Fan Mode
* the rest : * Ram: Corsair CMD12GX3M6A1600C8 6x 2 Go * raid 0 -> 2 x Caviar Black 1To * 1 ssd for OS * dvd burner