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HD38xx bios mod

well the difference is only clock speeds and amount/speed/type of ram...

the only reason flashing it with a 3870 bios would do anythign is if there is some sort of clock lock, which afaik there isnt (excpet for that 860mhz bug or w/e the speed is).

makes more sense just to OC it to 3870+ speeds
 
It would give the card more voltage which would allow you to take the core to higher speeds
 
The memory timings / voltage could be completely different between GDDR3 and GDDR4. I don't know for sure, but if I were you I'd find out for sure before potentially frying your new card.
 
i just bought one from newegg. should be here on thursday. anyone have an idea what kind of performance hit, having gddr3 instead of gddr4 on this card, i will see?
 
Different PCB on the 3850 and 3870, so don't count on getting more voltage just with a BIOS flash.
 
/digs up an old thread

...

Is the 3870 indeed using more volts?

(lol I'd thing upping vcore on the AGP variant might spell disaster fwiw)

And aren't the 3850's ram timings tighter ? I do believe that it has been mentioned once or twice on teh intarw3b... so maybe with a 3870's relaxed, one could achieve higher memory speeds, but at the cost of sloppier memory timing.
 
Earth said:
I have a powercolor 3870 w/ gddr3 -- runs like ass for me.
Click to expand...

What are its clocks? And how does it OC?

3870's usually ship with gddr4, right? Except for a few manufacturers that ship cards like yours I'm assuming. Teh Google finds far more ggdr4 3870's than ddr3 and gddr3's.
 
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