is proj 18432 single or double precision?

Moderators: Site Moderators, FAHC Science Team

Post Reply
Knish
Posts: 232
Joined: Tue Mar 17, 2020 5:20 am

is proj 18432 single or double precision?

Post by Knish »

I tried overclocking a 750ti that's been folding great as stock for over a year. I know FAHBench is outdated, but tests with double precision seemed ok yet single precision would fail even with no overclock. After a few good units were completed with the overclock, I just got a crash with 18432 so was just curious if single/double has any relevance? (the same WU started after reboot, so in about 3 hrs I'll hit the same point again without overclock this time so I still get to turn this wu in)
JimboPalmer
Posts: 2573
Joined: Mon Feb 16, 2009 4:12 am
Location: Greenwood MS USA

Re: is proj 18432 single or double precision?

Post by JimboPalmer »

The vast majority of floating point math in F@H is single precision, as I understand it some of the checkpoint math is double precision.
Tsar of all the Rushers
I tried to remain childlike, all I achieved was childish.
A friend to those who want no friends
toTOW
Site Moderator
Posts: 6296
Joined: Sun Dec 02, 2007 10:38 am
Location: Bordeaux, France
Contact:

Re: is proj 18432 single or double precision?

Post by toTOW »

Double precision performance is always limited by vendor, so it doesn't push the GPU very hard. It's not a good way to check stability.

All current FAH projects use mixed precision : the majority of computation is done in single precision and some specific operations are done using double precision.
Image

Folding@Home beta tester since 2002. Folding Forum moderator since July 2008.
Post Reply