As the title says, is there much benifit on overclocking my card (GTX 1070 ti)? I know in gaming you're only really looking at a 10-20% performance boost tops. Does this carry through to this kind of processing?

Yes, actually there is, at least for Nvidia cards. Nvidia penalizes memory clocks when a consumer card is detected to be running a compute load by the drivers.

You should at minimum overclock the penalized power state memory clock to get back to default memory clocks for P0 power state when running a video load.

Overclocking on GPUGrid can speed things up. However, you might find that you can't overclock as far as you can on the same card in gaming. One pixel off or an occasional artifact is OK for a visual image, but a single bad calculation early in a series of interdependent calculations can have a devastating effect. I would recommend increasing your clock speeds in smaller increments, and you have to be very patient, since the work units are long, to see the results. One of my two hosts (with a 1080, AIO cooled) seems to be very sensitive on increasing memory clock speeds very far at all before actually slowing down the work units.

A couple of other ideas for increasing GPU compute speeds:
- enable SWAN_SYNC (I can't see your computers so I don't know whether you have Windows or Linux and tell you how.) This keeps a CPU core always ready for the GPUGrid calculations needed in addition to the GPU, speeding up the hand-offs between the GPU and CPU. However, keep in mind this also keeps one core from other calculations while a GPUGrid work unit is active, so plan accordingly.
- switching to Linux (if on Windows) really speeds up the WUs as well. One of my hosts is a dual boot with Linux Mint and Windows 10. WUs that take 6.4 hours on the Windows side will calculate in 5.7 hours on the Linux side (same overclock on both.) I know it's a big move, but just throwing ideas out there.

As the Performance page says, overclock gently.

- switching to Linux (if on Windows) really speeds up the WUs as well. One of my hosts is a dual boot with Linux Mint and Windows 10. WUs that take 6.4 hours on the Windows side will calculate in 5.7 hours on the Linux side (same overclock on both.) I know it's a big move, but just throwing ideas out there.

I usually run Linux, but there aren't any WU for that currently. So Windows it is. I've pushed my card up 10% on both core and memory clock. I'll run that for a while and see how things go. It's still quite cool at ~67C using factory fitted cooling.

I'll give SWAN_SYNC a go. I found a post on here about it. https://www.gpugrid.net/forum_thread.php?id=4589#47419

I can't find the option to unhide my machine. Any clues?

I can't find the option to unhide my machine.

Many projects scale better than games as there is less I/O bottle necking the GPU so a 10% clock speed is closer to 10% performance.

One of my two hosts (with a 1080, AIO cooled) seems to be very sensitive on increasing memory clock speeds very far at all before actually slowing down the work units.

You should at minimum overclock the penalized power state memory clock to get back to default memory clocks for P0 power state when running a video load.

Depends on the tasks for a project, silicon lottery quality, task loading, GDDR RAM type, GPU generation etc. etc. whether speeding up the penalized memory clock speed on Nvidia cards helps or achieves nothing. Only way to know is to experiment.

E@H is special. AMD cards perform better than NV cards comparing $ and Watt. Memory speed is more important than core clock. Its more like mining than other BOINC projects. It also requires almost 1GB vram so bigger than many other projects. A tiny, recursive, computation app won't be as memory intensive and benefit less than a larger vmem load.

So I overclocked both the core and memory frequencies by 10% each last week. This resulted in a 1C increase in operating temperature and a reduction in GPUGrid time of ~50 mins!

I just ordered an artic GPU cooler and I'm about to fit that and see how far I can push this...

:)