HI every one
I am going to upgrade my computer. I’m not sure which Graphic card I should choose. I heard about GPGPU. and I checked that HD 5750 has about 700 stream processors. I wanted to know that GPGPU has an effect on 3ds max rendering via mental ray renderer or what?

Not yet.  Right now, mental ray in Max only uses the CPU for rendering.

3DS Max Design 2011 64-bit - Advantage Pack
Dell Precision T5500, Dual Six Core Xeon X5650 @ 2.67GHz, nVidia Quadro 5000, 24 GB RAM, Win 7 Enterprise 64-bit
Minneapolis, MN, USA

http://www.youtube.com/watch?v=_...&playnext_from=PL&index=2

check this wack dude out and his “sooopacomputa”:
http://www.youtube.com/watch?v=GOpBlYx2H1o

(check out 4:56 min in, they forgot to plug the sooopadoopacomputa in)

(maybe also take a look at Nvidia opposed to ATI, I “personally” like Nvidia since things seems to work better with it… i look at Nvidia like Intel is to CPUs and ATI is to AMD… seems developers place Intel and Nvidia absolute first during development.... that’s my “personal” opinion of course, i am sure many will disagree).

Intel i7 930 2.8Ghz 8 CORE HT / CoolerMaster Hyper 212 Plus (no OC yet!)
Nvidia EVGA GTX 260 v296.10 driver (Nitrous in max) / Dual Dell Professional P2311H 23” Displays
ASUS P6X58D-E / Corsair Dominator 12GB 1600 DDR3 / Antec tp750 blue / Antec 300 Illusion
Windows 7 Pro x64 SP1
3ds max design 2012 x64 SP2 (since the 1st DOS version!), Mudbox 2012 x64 SP3, Softimage 2012 x64 SP1, Maya 2012 x64 HF2, Adobe CS5.5 x64, CorelDRAW x5 SP3, Painter 12, etc etc
Wacom Intuos4 v6.2.0w5 / 3DConnexion Space Navigator (drv6.15.2)/ Logitech Performance MX mouse (5.33.14)

Check out this blog post at RenderStream. Pretty interesting, and let’s you know a little about what may come in the near future.

3DS Max Design 2011 64-bit - Advantage Pack
Dell Precision T5500, Dual Six Core Xeon X5650 @ 2.67GHz, nVidia Quadro 5000, 24 GB RAM, Win 7 Enterprise 64-bit
Minneapolis, MN, USA

right now iray http://www.mentalimages.com/products/mental-ray/irayr.html
and octane render http://www.refractivesoftware.com/index.html
use gpu to acelerate render processing.. both with CUDA technology… but its not only a video card theme,,, the motherboard is very important… actually i know that ASUS has an mobo that support CUDA..
im a fanatic for ATI RADEON series,,but at this time.. with iray ummm… i think in the future will buy a nvidia…

fotonica[studios]
.architectural + products visualization
http://www.facebook.com/fotonica.studios
http://www.flickr.com/photos/mentalray/show/
-core i7 2.66ghz(OC 4.1ghz)
-mushkin ddr3 12GB-998681 1600 mhz (3x2GB) XP3-12800
-ati radeon 4890 1GB
-case antec nine hundred
-motherboard asus rampage II extreme LGA1366
-cooler NOCTUA NH-U12P SE1366