VDDC Offset + Basic Custom timing------------------
Here's a nice update for those who have Reference cards.
In the package included, i've put 4 roms with VDDC offset.
1. -50mV
2. -69mV
3. -81mV
4. -100mV
You can of course adjust these however you want, if you want to have an even tighter undervolt you can search the rom for this --> "
8D 00 F8(-50)
00" and replace the F8 part with EE(-112) for example.
These roms also have a custom timing included. It's a basic one but it will give you a very high increase for XMR.
Greetings and have fun!
Link:
Link- Atikmdag Patcher if you have driver issues ->
Here----------------------------------------------------
Ok guys, posted this over at bitcointalk.
Link:
https://bitcointalk.org/index.php?topic=1584617.0Open for discussions in here though
Short overview:
Results.
First run (no mod): 24Mh+ : Core clock 1275, Mem Clock 2000
https://s10.postimg.org/4rbj8v2m1/Stock_Test_Run.pngSecond run (modded): 28Mh : Same clocks, so: 1275, 2000
https://s9.postimg.org/byc2sahgf/mem_Edit_Testrun1.pngNext run (still modded): 30.5 - 31Mh : Lowered core to 1192 and raised memory to the (for now) max of 2250.
https://s9.postimg.org/4azgwfo27/mem_Edit_Testrun_Final.pngThen, for my final(for now) run: 31.5-32Mh : Raised core to 1220 and raised memory to 2275
https://s10.postimg.org/vqo4i0m2x/mem_Edit_Testrun_Final2.pngWill be doing more tests later, i'm sure i'll be able to go over 32Mh.
Great thing about this, when i ran the first testrun with stock clocks, card was at around 60 degrees and no abnormal fan speed.
Overall, awesome card Smiley
Power usage tests will follow later when i'm done tweaking my rom to the sweet spot Smiley
Greetings!
Comments
but that looks awesome so far....
luckily I built my 6x480 card rig with dual 850w psu just in case
Gonna need that new psu addon soon.
Stability though will be key. doing it for 10 mins is one thing...2-3 days it altogether another story.
how ever that fact it can do it even if it were for a short stint is a good sign the hardware is capable we just need the code to make it work harder
Temperatures didn't go over 70 degrees when pushing it (last picture).
So i'm very sure this is stable You're kidding right? I included the GPU-Z readings for a reason...
You going to work on 470's next?
good to see you figured out the Windows driver signature enforcement, it's what has held back my experimentation thus far.
@boysie if these are launch-day "4GB" reference cards then yes, physically identical with same 8GB memory chips, should be indistinguishable performance once flashed.
But... later true 4GB 470 or 480 are a different beast entirely, using different VRAM which will require different BIOS & timings, and won't reach the same heights. (the 4GB 470s seem to use Hynix instead of Samsung)
Funny thing is, i tried it on ubuntu as well, i didn't get the same results tbh. (Driver on Windows for RX* cards is a lot better)..
Simplest way to test is to flash an 8GB rom on a 4GB card, you'll notice quite quickly if it's one that "was" software locked.
Anyhow, as i've said before, if i would modify the 4GB versions the same as i would have done with mine, results would be far better as well.
But i don't think they'll be hitting 30+ any time soon
Greetings
I have one from a few weeks later from amazon and it looks identical also, I also have 1 8GB ref and it also is identical bar the label
so I think I'm good
Boysie
From the reports I've seen they switch to a different strap when OCed above 1750mhz, and stock performance is no better than R9 380
With luck this signature enforcement bypass can be adapted to Win7 as well.
Dunno if it's worth it to go out and buy a 470.. maybe at a later point.
replaced my 750 + 430 psu setup (was only on 5 cards) with dual 850w P2 and added 6th card...all fine now. drivers still suck a little but no where near as poor as the 470's
Boysie
Thanks
Boysie
PS: happy to send you some MH if this all works out credit where credit due etc...
Results: Core 1220, mem 2000. Eth speed: close to 28Mh, Sia: around 400+Mh.
Reference: https://s4.postimg.org/51a5mgs2l/dcri30.png
Greetings
here in the us you cant find anymore ref 480s so i bought a few 470s or every brand to test. the weakest are the msi cards max mem is 1700 the 4gb oc ones , sahpires can go to 1800 but thats still low.
im seeing 22 to 23 mhs range for the 470s stock with mem maxed we can proably get them to 24 mhs .
you cant really compare them to 380s since they only use 100 to 120 wats and run super cool under 70 degrees.
i think mods on threse cards could produce outsanding results too at least the 8gb 470s and nom 4gb msi cards