4890 OC limit fixed!

[..::G80::..]

For example:
When I pick 1070MHz core and 1153MHz rams through Rivatuner, I get a GREY screen with tiny paralel lines on my monitor....When I pick 1080MHz core and 1153MHz rams, I don't get this....

I noticed same thing, when i overclocked 4890.
My max @ air was 1080MHz core.
Great info Hipro5.

[dinos22]

For example:
When I pick 1070MHz core and 1153MHz rams through Rivatuner, I get a GREY screen with tiny paralel lines on my monitor....When I pick 1080MHz core and 1153MHz rams, I don't get this....

yes you are right it does have some odd clocks

for me
1064/1200
and then same problem as you at 1066/1200
but i drop RAM to 1172 specifically and get 1080 and 1092 but they are a little flaky on water cooling hehe

there is definitely weirdness there but i was at the cooling limit so that was what i thought was happening

[W1zzard]

any chance someone could find such a clock combination at lower frequencies to verify this is not temperature/heat/clock/load/whatever dependant ?
i already have a suspicion what could be wrong

[hipro5]

any chance someone could find such a clock combination at lower frequencies to verify this is not temperature/heat/clock/load/whatever dependant ?
i already have a suspicion what could be wrong

I'll make some test tommorrow because today I'm TOO busy with work....

Maybe it's some kind of bug like the days of the 1900XTXs....I don't know...

[EXPANDER]

asus 4890 1gb voltage tweak vga retail.

SINGLE 4890 1000/1114 MHZ AIR STOCK cooler
1.4 Vgpu Software, 1.2 Vmem default voltage, Room Temp 40C, Maximum air overclock ,
very, very hot weather than cold air may exceed the speed limit

3DM-2006 : 24221

[..::G80::..]

Room temp 40C??? WTF

[EXPANDER]

Room temp 40C??? WTF

In this case, speed is affected +40 c by the sweltering room.
4890 vga +90c fan speed %100 .

[EXPANDER]

1001 / 1201 3DM06 Pass

Valid 24.5K: http://service.futuremark.com/compare?3dm06=11425540

SS

[SF3D]

Expander- This thread is not about how high people can overclock their vga's. This thread is about the bios fix. Thnak you for understanding.

1100 on air is impressive and 1200+MHz on -50c is impressive.

I will write few words about current situation later today.

[carpo93]

Expander- This thread is not about how high people can overclock their vga's. This thread is about the bios fix. Thnak you for understanding.

1100 on air is impressive and 1200+MHz on -50c is impressive.

I will write few words about current situation later today.

[LowRun]

I will write few words about current situation later today.

[runmc]

yes you are right it does have some odd clocks

for me
1064/1200
and then same problem as you at 1066/1200
but i drop RAM to 1172 specifically and get 1080 and 1092 but they are a little flaky on water cooling hehe

there is definitely weirdness there but i was at the cooling limit so that was what i thought was happening

Same for me dinos

At 1060/1200 I'm fine, but 1070/1200 I get a green screen with vertical lines no matter how cold I get. I ran up to 1.5v and still the same. I did not try lowering the ram. I'll try that next.
Any news on bios? I know you'll update us as soon as you have positive results.

[SF3D]

I already wrote long text, but my 3G connection faild in the summerplace and I lost the text.

I did some testing in the end of last week and did 03, 05 and vantage runs at 1250MHz and 1.45V (-60c) Cards are working fine until I hit 1200+ MHz.
With this "fix" bios there is no problems using different memory speed with some core MHz values etc. You just hit the limt of the chip very easily. There still might be some other limiting factors in bios and we will have to look them.

If for example Hipro will do some heavy hardware modifications or use vga maximizer, he will gain some MHz for sure. But using just stock card + software voltage control, it will not go that high on core speed as I hoped.

Well, all cards seems to be cold bug free, so temperature is not the problem.

Let's wait how high Hipro can push the card and then see what was the key thing for it

[carpo93]

when the bios becames pubblic?

[loopy83]

Hello, thanks for sharing SF3D
You said all cards are coldbug free... so there is no gain from -60°C to -140°C with the same voltage?

If this is right, chip maxed out or there is another limitation in Bios... oh man... hard stuff...

All cards show the same behaviour?

[Revv23]

I'll make some test tommorrow because today I'm TOO busy with work....

Maybe it's some kind of bug like the days of the 1900XTXs....I don't know...

Don't you know never to let work or family get in the way of your overclocking!

[EXPANDER]

Go to a place with the software is requirements for high-speed hard mode.

Software mod gpu max 1300 mhz limits.
Hard Mode Gpu max 1300 / 1500 mhz + Fast.

[G H Z]

when the bios becames pubblic?

If I'm reading him right it won't ever be public. It would be interesting to know why AMD prefers not to release it.

[blind_ripper]

If I'm reading him right it won't ever be public. It would be interesting to know why AMD prefers not to release it.

same like nvidia did not wanne share the coldbug fix bios for the 9800GTX en GX2 . non really .

[massman]

Hello, thanks for sharing SF3D
You said all cards are coldbug free... so there is no gain from -60°C to -140°C with the same voltage?

Make that -35°C to -190°C

[hipro5]

Guys if this card has ONLY THREE phases and ~30A to 35 (even 40A) each, what do you expect to see?.....
EVEN if you mod it not to shut down from any kind of prOtection, the Mos-Fets of it CAN'T provide you THAT much POWER....

Wait and see a 2k1 with them in CF powered by 2 of my VGA Maximizers....

[dinos22]

if these reference 4890s had a true 5-phase power cuircuit on GPU core it would easily hit past 1250 with more volts i'm sure

the 4870 Asus Matrix cards i have here with non-reference PCB and 4phase and custom software providing up to 1.6v on the core let me bench the cards in xfire past 1100MHz core....i can only imagine a similar PCB with 4890 silicone drooool hehehe

one of the cards packed it in but i did take a screen testing nature with single later......

[sofos1990]

Wait and see a 2k1 with them in CF powered by 2 of my VGA Maximizers....

I can't wait to see this mate

@SF3D: Will you make public the "special" bios after George's reasults?

[Gautam]

Guys if this card has ONLY THREE phases and ~30A to 35 (even 40A) each, what do you expect to see?.....
EVEN if you mod it not to shut down from any kind of prOtection, the Mos-Fets of it CAN'T provide you THAT much POWER....

no BIOS can fix this cards obvious starvation of power.

[SF3D]

Why you have to repeat this again and again? In the start you removed this thread and you have said at least 5 times, that I am talking BS here. I find it only funny.

This bios does fix some issues, but it does not make cards to overclock better. That have been said many times. If the core in some card is bad, it will be bad after flashing the fix bios. But if some card does have a good core, but it is limited by SPLL divider, this fix will give wings to those cards. Like in my case, one card gained almost 200MHz by the bios only.

I hope this bios will be released, so everyone can see this by themselves. Now everyone is just hoping that there is some miraculous HW mod, which will fix SPLL_REF divider issue. HW mods will fix the need of power, but in some cases that is not helping at all.

Tired of talking about this. Next time I will publish the bios or I will not say anything anymore. This is boring for me as well.