Hey,
 
Pre-ordered a XC3 ultra, and for you lucky ones that have yours already, can you share overclock results?
 
Wanting to see what to look forward to!
 
Thanks!

Youll be disappointed.
Was going to link you to post I made but looks like that thread has been deleted.

Stock = unable to reach the rated boost speeds on the box since its on power limiter of 350W 100% of the time. 16.8K firestrike store.
Power limiter silder maxed = Reaches advertised boost clocks but still 100% of the time on power limiter, 17.6K score.
Adjusting core offset doesnt really gain anything since you add +100 core and the card will boost up to that for 1 sec then drop right back down as it slams against power limiter of 366W (max setting)

Flash the Gigabyte Gaming OC bios to it 370W.
Boosts up to 1755mhz and pritty much stays there. 18.9K score.
Move the power slider to max 390W. Boosts to 1850mhz. 19.8K score.
Add +100 core and flatten the curve so it doesnt go over 1V. 20.5K score Boosting to 1925mhz. Still bouncing off power limit most the time.

Shunt mod it. +150 core +600 memory, Boosts to 1975mhz and pritty much stays there with light loads boosting to 2100mhz.
Pulls 480W tho. 21.2K score and thats the limit of the stock cooler with it hitting 75C with fan maxed out and dropping clocks due to temp.


The power limit is way too low for the 3090 XC3 Ultra.
Search though the forum and youll see a few posts on it that havnt been deleted yet.
Youll get the same performance at 350W on a 3090 as you would with 350W on a high end 3080.

To basically get any gains youll need to void warranty with the GB bios.
But then your still at the limitation of what they can release and remain in the pci-e spec.
Theres ment to be the Aorus Master bios thats 400W but you wont see any bios for the 2 plug cards above that.

Flash mine the 3rd day of owning it lol. I got my card on the 28th.
Jump on the overclocker dot net 3090 group theres 7 of us XC3 Ultra owners over there now.
The spec for wattage over the connectors and slot isnt the max they can supply before they catch fire. Its the min they have to be able to handle to be approved to meet spec. Any decent PSU and motherboard will handle way higher.
With the shut mod im running at the moment, Iv got 204W going over each 8pin plug. Using a EVGA 1000W PSU.

Here is the best I could get on EVGA bios vs stock on the Gigabyte bios in port royal, Since port royal is 100% dependant on your power limit and how good your chip is.

But do note when using the GB bios 3 people have said that there middle DP port doesnt work while they are on it, The other 2 and HDMI still work tho.
All 3 DP and HDMI still worked for me tho.

You need to use the Ampere edition NVFlash. W1zzard is working on putting that into GPUZ and will have a update on monday.
All the details and all avaliable bioses are on overclock dot net forums 3090 thread on the first post with instructions.
They dont let you post links on here but you should be able to find it searching google "overclock net 3090"

Yup.
Heaps of info on there. But what you need is all on the first page.

Hopefully EVGA will release an offical bios with proper power limits.
The XC3 Ultra is a 370W card minimum, Not a 350/366W card. Thats what the Black and Gaming versions are.

I have the 3090 XC3 Ultra and with;
Stock: card boosts to about 1800-1815 Mhz but very rarely, mostly sits about 1755-1775 Mhz and once in a while hitting 1875 Mhz.
Power Limit set to 104% and custom fan curve: it boosts up to 1920 Mhz with spikes to 1980 Mhz and once in a while dipping into 1890 Mhz.
 
Seems like the card is hitting a thermal limit at stock. 
 
 
 

bmgjet

Awesome thank you so much. 
Great work you did there, respect