RTX3070 fe overclock

[forteh]

Been pushing my 3070 in an attempt to squeeze the last couple of ms out of it.

So far I've gotten up to +175mhz core, +1250mhz ram, power at 105% with the stock fan curve.

It's currently 61st on the list (of 3600/3070 combo) on firestrike.

In DCS vr I can sustain a solid 2100mhz boost clock at 100% load with temps peaking at around 70°C, goes up to mid 70s when benchmarking. Core voltage peaks at 1070mv I think.

Can I realistically get much more out of it? The top of the firestrike list has much higher clock speeds, I presume that these are going to be on 100 fan/water loop to enable silly voltages?

Currently it's reasonably quiet and I'm looking for an every day overclock. It gains me around 1 - 1.5ms decrease in frametimes which isn't too be sniffed at.

Any thoughts or have I hit the ceiling for noise/heat level?

 

[forteh]

I've undervolted it since I got the card back in November as the noise was terrible compared to the strix 1070 it replaced, however I'm getting more performance from it wound up. That's not saying I hadn't undervolted incorrectly

It was locked down to 850mv previously and it was nicely quiet and obviously still blew the 1070 out of the water. Switching from stock to overclock back to back gets me from 14.5 to 13ms frametimes, that said I've not tested back to back with the undervolted profile.

Do you have a recommendation for how far to undervolt or is it purely a trial and error thing? Reducing the power limit in afterburner results in a proportional reduction in performance, is that the same as undervolting via the curve editor it have I got the wrong end of the stick?

 

[forteh]

I'll have a play with it when I can (waiting for the toddler to decide to go to sleep ).

I think it was about the 1050mv for the 2100 core, so if I set a flat curve from 1025mv initially and then test downwards till I hit instability I should theoretically drop temps which will allow a higher core boost?

 

[forteh]

So I've been playing with the voltages but not making anything other than negatives to performance.

I've tried locking the clock to 1000mv and below @2100 on the curve editor and all is done is reduced the consistent clock speeds but not the temperatures to any significant degree.

Unlocked, the voltages get up to about 1080mv, temps up to 77°C and clock speeds stay above 2000mhz (typically 2050-2115).

Locked down, the voltages are obviously capped at 1000mv, temps up to 76°C and clock speeds drop down to around 1950.

Both with the vram running at +1275mhz

Stock Vs the overclocked is worth 10fps in DCS vr which is massive. Given that the fan profile and temps are basically the same between the two it makes no sense to run the undervolt.

 

[forteh]

That's about inline with what I've done apart from I didn't check the voltages at stock. Have you locked the voltage at all?

I can't go any higher on the core at current 105% power, it instacrashes on heaven as soon as it runs. I doubt want to feed it more voltage to try to get more.

The memory might have some more in it, will have to try winding the core back and pushing the ram up till instability then try with the core back up to +175.

 

[forteh]

Yeah I've also found that for best performance the stock curve is pretty damn good, anything above +175 on the core artifacts but I'm not too interesting in upping voltage to chase the last few mhz. If I drop to 850mv then the temperatures stay below 65 but then is only clocking to 1800mhz instead of 2100mhz.

Interesting about the error correction in the gddr6, I've yet to find an ceiling that causes artifacts on the memory; this is probably the error correcting as you've mentioned. I have also seen some slight reduction on fire strike scores at the higher end of the memory speeds I've been using. Will try winding it back a bit and see if I can fine tune it better, I was jumping in 50mhz steps before so it's not taken too much time to see the performance drops.