Titan x vs Titan Z

[DrDrRTP]

I only have one slot available for replacing my old GTX 670. Which will give me the best performance for folding? Titan x vs Titan Z
TIA
RTP

[bollix47]

Limiting the answer to the two choices you've given the Titan X would give the better performance. However, the GTX 980ti can do similar to the Titan X for less $$$.

Source: http://gpuboss.com/gpus/GeForce-GTX-TIT ... TX-TITAN-X - http://gpuboss.com/gpus/GeForce-GTX-TIT ... GTX-980-Ti

[DrDrRTP]

thanks - it seems counter intuitive that a single GPU would outperform two high end GPU's for the folding project. Can you help me to understand. Another question if I may
Caveat here - I use Vegas video on occasion- not limiting myself to NVIDIA - other options

[kiore]

thanks - it seems counter intuitive that a single GPU would outperform two high end GPU's for the folding project. Can you help me to understand. Another question if I may
Caveat here - I use Vegas video on occasion- not limiting myself to NVIDIA - other options

There are different ways of measuring 'better', people use: total performance by points per day (PPD), PPD/$, PPD/power usage or a combination of these.
Some 'more powerful' features are not required for the project such as the RAM in this case, at present having 12 rather than 6 gives no advantage and the only projects that are RAM selective (AFAIK) require it on the system rather than the card. Historically a measure of 'betterness' for GPU's has been the shader processors, more is better.
So with the Titan having more shaders, 3072 vs 2816 in the 980ti you would expect it produces better PPD, but at almost double the price and using more power. In the observed result at this performance level other factors such as bottle necks at the CPU, PCIE speed and speed of upload/connectivity also come into play.
IMO for FAH the Titan doesn't really offer a significant advantage, but your decision may be based of your other usage.

[DrDrRTP]

Thanks- yes I figured the amount of ram at 12 wasn't a factor and was super adequate. I was looking at the 5,000+ cuda's versus the 3,000+ for either the Ti or the Titan X and since (as I understand it) the more cudas the better for folding. Am I wrong?

[kiore]

Thanks- yes I figured the amount of ram at 12 wasn't a factor and was super adequate. I was looking at the 5,000+ cuda's versus the 3,000+ for either the Ti or the Titan X and since (as I understand it) the more cudas the better for folding. Am I wrong?

Well it is really 2 cards, the SLI doesn't help in FAH, yes total of 5,760 shaders means it is sort of like 2 x GTX 980ti's.
If you have only 1 slot and want to max it to the max, price and power usage no issue then it definitely is this going to give that single slot the biggest bang.
Cooling is likely to be a serious issue unlikely to be solved by just adding another case fan.

[DrDrRTP]

thank you very much.. I have mucho fans in this oversized case with oversized fans.. RIch

[foldy]

I think the GTX 980 TI has less cuda cores but each core has double the performance than cuda cores on Titan Z.

But is there no FahBench value available for Titan Z anywhere?

edit: I found it "Titan Z = 2x GTX 780"
So in FahBench benchmark:
GTX 780 __ has 44 ns/s => Titan Z could have 88 ns/s
GTX 980 TI has 75 ns/s
http://www.anandtech.com/show/9421/the- ... re-asus/16