Has anyone tested the GTX 680’s? Can anybody confirm the speculated poor performance for Vray RT? Does Vray RT use DirectCompute? and can gtx 680’s poor DirectCompute performance potentially be a driver issue? (desperate to know, 3 cards are arriving tomorrow, and could potentially exchange them l…

http://vr-zone.com/articles/nvidia-kepler-gpus--back-to-games-away-from-compute-/15332.html [double.jpg.jpeg]

Single Precision FP on the 680 doesn’t look so bad. Does Vray RT even use double precision floating point?

[image] Phoenix and BackBurner problem Does Vray RT use DirectCompute? No. Best regards, Vlado

[image] Will RT replace Vray? Does Vray RT even use double precision floating point? At the moment, no. Best regards, Vlado

GTX680 is strictly gamers card without a lot lot LOT of things for GPGPU computing. This is why the card is cheaper and colder with smaller chip. There will be a full GTX 6xx card with full support of GPGPU computing later, I think after one or two months.

:frowning: Just cancelled 3 GTX 680’s which were meant to arrive tomorrow. Not enough info out there, & lots of pessimism. Still no one benchmark it in vray RT with the Indoor benchmark scene?

In GK104 cuda cores are simplified a lot. Waiting for GK110 :slight_smile:

So here are some preliminary results with the CUDA code compiled with the 4.2 rc2 CUDA toolkit (not the final version yet) for the benchmark scene; OpenCL code is compiled by the respective driver. This is our latest GPU code, which is somewhat more complex than before. GeForce 680 GTX/Driver 301.1…

Basicaly its disaster hehe… curse u nvidia !!!

[image] how do you model? Basicaly its disaster hehe… curse u nvidia !!! On the bright side, at least with the 4.2 toolkit the CUDA code is actually faster than OpenCL :slight_smile: In any case it seems to me that nVidia wanted the 680 to have roughly the same compute performance as the 580… …

GTX 680 Performance (vray RT) & DirectCompute

V-Ray V-Ray Common Hardware

vlado March 26, 2012, 11:14am 4

No.

Best regards,
Vlado

Topic		Replies	Views
GTX 680 and RT General	14	1237	July 4, 2012
the right graficcard Public	3	198	March 28, 2012
Just Finished Testing Dual 580's vs Dual 680's Hardware	9	677	July 4, 2012
Which Graphics Card ? General	13	680	April 12, 2012
Vray Newsletter and GPU... General	7	335	May 9, 2012

GTX 680 Performance (vray RT) & DirectCompute

Related topics