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Jaberwocky, do the benchmark with pathtracing, and then see CPU usage (and comparable render time with the others)

This is interesting

The results:

4000 samples/Px - Pathtracing on/Alpha Shadows off
Result : 14mins 40Sec

at Stock Speed: 715MHZ Core : 1800MHZ Ram

Overclocked to 820MHZ Core : 2250MHZ Ram

Same result 14 Mins 40 Sec

So how does that work then ?

Card is a Gigabyte GTX 460 1GB model.

Can you post SS? How many megasamples per pixel you have with 820mhz clock?

Cheers,
n1k

N1K

To clarify my test result above

The test came in at 14 mins 40sec for 4000 samples/Px at standard 715Mhz stock clock and at 820Mhz overclock.

The net result is that overclocking the card produced no speed increase on the render.

It must be just this scene.There must be something in this scene which is hitting a performance wall.

I did the same test with one of my own scenes and overclocking the card from 715Mhz GPU and 1800Mhz memory to 820Mhz GPU and 2250Mhz memory and this produced a 25% increase in rendering speed.

It's a bit of a mystery

Using the beta demo 2.46 benchmark scene with unmodified settings and no viewpoint change a FX 1800 got aprox. 1.15 Ms when it settled down compared to a 3.1 Ms with a Quadro 2000. The Q2000 has three times the CUDA cores and the rendering speed difference is aprox. 2.7x better. If you take into account that the FX1800 clock rate is 1342MHz and Q2000's is 1221MHz, then if the Q2000's core would be as high, the difference would be close to 3x again. This means that the cores scale really well. Twice the cores, twice the performance when everything else being equal.

The Quadro 2000 card is a loaner, probably going to substitute it with a GTX 560 Ti 2GB version. With 384 cores and a shader clock rate 1645MHz I'm expecting around 8.4 Ms in the benchmark scene. I don't want to get the GTC 470 as its power draw is significantly higher and I'm liking the 2GB memory on the 560 Ti (+ significantly cheaper).

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AUTHOR: RatedR

OS: Windows 7 64bit

Software: Octane v1.00 Beta 2.46b - 64bit

MACHINE: Selfbuild

PC RAM: 16 GB DDR3 1600

CPU: Intel Core i7 2600k @ 4.8 Ghz

CPU THREAD : 8

CPU TEMP (Core min/max) : 50°C - 56°C

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GPU: nVidia GeForce GTX 590

Cores: 1024

GPU CLOCK: 668MHz

GPU TEMP : 84°C

RENDETIME: 10m 02sec
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5.80 ms/sec 7.37 FPS