The Ampere RTX 3080 Owners Thread

ltron · 31 Mar 2021 at 13:17

ikinson said:
My fe only does 17,100-17,200 at stock.
Have talked about this earlier in this forum but just gave up lol people seem to get 17,500-700. Don’t know how.

I think it's silicon lottery or they have undervolted/tweaked the card in some way.

imginy · 31 Mar 2021 at 13:39

doug_1986 said:
https://www.nvidia.com/en-gb/geforce/news/geforce-rtx-30-series-resizable-bar-support/

It's all on that link, and yes, you need to replace both your mobo and CPU. I can't imagine you'll ever have support on your current setup, but I could be wrong.

RDR2 is supported, but not RDR. I assume it's 2 you're playing?

Yeah I read the Nvidia page saying 10/11th gen only but I had also read about motherboard manufacturers that had added support to 9th gen boards so had me confused.

And yeah I'm playing red dead 2 (there is no other red dead on pc) In the reviews I see it was taking minimum frame rate up by 180% on the 3060 mins went from 30fps without resize up to 90fps with it. This sounds too good to be true, I just wondered what I would get at 4k 120hz.

ikinson · 31 Mar 2021 at 14:07

chrcoluk said:
If you read the last few pages you can see our discussion.

Its undervolted with a target max clock of 1905mhz (same clock as what my card does at stock), because its undervolted it doesnt hit power limit and has lower temps so the performance is higher from sustaining the target clock speed. Those runs also keep the power limit at 100%. So I am not overclocking and not boosting power limit. I am also on stock fan curve which is pretty passive and quiet.

Actual stock config throttles down to below 1800mhz during the run. Sustainable clock is more important than peak clock.

On modern boost architectures, undervolting is the way to go in my opinion.

I see. Thanks. Virtualisation is actually turned off in mine. Any other troubleshoot you recommend?

ikinson · 31 Mar 2021 at 14:08

ltron said:
I think it's silicon lottery or they have undervolted/tweaked the card in some way.

Yes. Silicon lottery it is. Feels bad man when I’ve paid so much for this.

chrcoluk · 31 Mar 2021 at 14:16

ikinson said:
I see. Thanks. Virtualisation is actually turned off in mine. Any other troubleshoot you recommend?

Make sure fclk is 1ghz in bios (intel platform, not sure about ryzen), there wasnt really anything else I did that had any noticeable impact on scores other than the undervolting.

My opinion is clocks between 1800-1900mhz are optimal with a voltage between 0.825 and 0.882 depending on binning of your card.

Doug, chroniclard and itron using 0.85v for 1905 I think, Nexus18 0.825 at 1815mhz. I am currently using 0.882 for 1905 but I am planning to try and lower that as its higher than everyone else here.

End of day silicon lottery will always have an impact.

ikinson · 31 Mar 2021 at 14:19

chrcoluk said:
Make sure fclk is 1ghz in bios (intel platform, not sure about ryzen), there wasnt really anything else I did that had any noticeable impact on scores other than the undervolting.

My opinion is clocks between 1800-1900mhz are optimal with a voltage between 0.825 and 0.882 depending on binning of your card.

Doug, chroniclard and itron using 0.85v for 1905 I think, Nexus18 0.825 at 1815mhz. I am currently using 0.882 for 1905 but I am planning to try and lower that as its higher than everyone else here.

End of day silicon lottery will always have an impact.

But undervolting doesn’t give better fps ingames, it gives lower, if not equal to stock at best from what I’ve seen.
Also where does this fclk come under in the bios? On ryzen.

chrcoluk · 31 Mar 2021 at 14:20

ikinson said:
But undervolting doesn’t give better fps ingames, it gives lower, if not equal to stock at best from what I’ve seen.
Also where does this fclk come under in the bios? On ryzen.

Well if you dont agree then dont do it. Its everyone to their own really, for me I want power efficiency and low temps, the performance boost is a nice bonus. I am not one of those people who accepts large power jumps for tiny performance gains.

ikinson · 31 Mar 2021 at 14:26

F

chrcoluk said:
Well if you dont agree then dont do it. Its everyone to their own really, for me I want power efficiency and low temps, the performance boost is a nice bonus. I am not one of those people who accepts large power jumps for tiny performance gains.

Fair enough, I’ll give it a shot. Thank you.

AyeAyeAhoy! · 31 Mar 2021 at 18:01

imginy said:
n the reviews I see it was taking minimum frame rate up by 180% on the 3060 mins went from 30fps without resize up to 90fps with it. This sounds too good to be true, I just wondered what I would get at 4k 120hz.

Blimey that would be good!

I have the hardware but not the games!

AyeAyeAhoy! · 1 Apr 2021 at 07:43

Slightly annoyingly, went to enable REBAR last night. Updated bios, updated Nvidia driver and ran the firmware update. All went through but still no rebar.

Looks like the BIOS that Gigabyte released about 4 days ago for my mobo doesn't enable it. But they have enabled rebar for AMD cards :confused:

opethdisciple · 1 Apr 2021 at 11:10

doug_1986 said:
Slightly annoyingly, went to enable REBAR last night. Updated bios, updated Nvidia driver and ran the firmware update. All went through but still no rebar.

Looks like the BIOS that Gigabyte released about 4 days ago for my mobo doesn't enable it. But they have enabled rebar for AMD cards

Which board?

I have an Aorus Elite x570 and it works for me.

Go in to the bios and enable 'above 4g decoding' and 'resize bar support'.

AyeAyeAhoy! · 1 Apr 2021 at 12:40

opethdisciple said:
Which board?

I have an Aorus Elite x570 and it works for me.

Go in to the bios and enable 'above 4g decoding' and 'resize bar support'.

Ah, that did it, thank you!

It's a B550 Vision D. I need to be able to use it for work too, so the onboard Thunderbolt ports are what I want it for.

chrcoluk · 1 Apr 2021 at 14:36

With rebar on in bios, my GPU seems to ramp up slower and does a little drop of clock speed now, I am averaging as follows.

17950-18000 with rebar off in bios.
17950-18000 with rebar on in bios and force enabled in driver for 3dmark.
17800-17850 with rebar on in bios, and rebar off in 3dmark.

imginy · 1 Apr 2021 at 14:40

chrcoluk said:
With rebar on in bios, my GPU seems to ramp up slower and does a little drop of clock speed now, I am averaging as follows.

17950-18000 with rebar off in bios.
17950-18000 with rebar on in bios and force enabled in driver for 3dmark.
17800-17850 with rebar on in bios, and rebar off in 3dmark.

HI,

Do you still have same system as in your sig?

Is rebar working on your 3080+z370?

chrcoluk · 1 Apr 2021 at 15:25

imginy said:
HI,

Do you still have same system as in your sig?

Is rebar working on your 3080+z370?

Same system and yes its working now.

chrcoluk · 1 Apr 2021 at 15:49

doug_1986 said:
chroluk knows more than I do about the 'how and why' - all I know is the results I'm getting, and they seem to be in line with others here.

My Stock run - https://www.3dmark.com/spy/19369939
My Undervolted run - https://www.3dmark.com/spy/19372719

My curve -

I cant get my card down to 0.850v like you guys, lowest I can get it with 1905mhz is 0.862v and if it even briefly goes to 1920 it will crash so thats right at the limit, so congrats guys you got better chips

With that said the difference doesnt seem anywhere near as big when comparing 0.882 to 1.00v, so still a chunky undervolt.

--

ok here is a run at 0.868v with it peaking at 1920mhz but set to 1905 on curve. Rebar enabled.

I will probably change this profile to the next voltage up so is a buffer. so probably 0.874v meaning my 0.882 was close anyway for this card.

gpu 18050

https://www.3dmark.com/3dm/60216138?

AyeAyeAhoy! · 1 Apr 2021 at 17:57

chrcoluk said:
With rebar on in bios, my GPU seems to ramp up slower and does a little drop of clock speed now, I am averaging as follows.

17950-18000 with rebar off in bios.
17950-18000 with rebar on in bios and force enabled in driver for 3dmark.
17800-17850 with rebar on in bios, and rebar off in 3dmark.

That's interesting, so rebar is having a negative effect on scores when force enabled in 3dmark?

I'll have to try mine again tonight then!

chrcoluk · 1 Apr 2021 at 18:00

doug_1986 said:
That's interesting, so rebar is having a negative effect on scores when force enabled in 3dmark?

I'll have to try mine again tonight then!

I have no idea whats going on, There appears to be possible overhead simply from having it enabled in the bios, but enabling Rebar in the software overcomes the overhead, the problem been of course most games have it disabled in software by default due to Nvidia policy. I do plan to do some more tests.

Its also entirely possible also the scores going up and down when I toggle it in inspector are just a fluke.

In the grand scheme these are only tiny % changes.

varkanoid · 1 Apr 2021 at 18:01

chrcoluk said:
.

Doug, chroniclard and itron using 0.85v for 1905 I think, Nexus18 0.825 at 1815mhz. I am currently using 0.882 for 1905 but I am planning to try and lower that as its higher than everyone else here.

chrcoluk said:
ok here is a run at 0.868v with it peaking at 1920mhz but set to 1905 on curve. Rebar enabled.

850mv @ 1920mhz is my sweet spot. It can nearly do 825mv @ 1920mhz but not quite. Plus of course +500 on RAM.

chrcoluk · 1 Apr 2021 at 18:06

varkanoid said:
850mv @ 1920mhz is my sweet spot. It can nearly do 825mv @ 1920mhz but not quite. Plus of course +500 on RAM.

Judging by replies on here 0.850 seems common, but me losing the silicon lottery is nothing new, used to it.

Also my 0.868 cant pass port royale haha, so yeah 0.882.