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View Full Version : Hd 3850, Bios.

prophylactic
11-27-2007, 03:36 AM
As it would seem, the 3850 is essentially an underclocked 3870, if I'm not mistaken? If this is, in fact, the case, it seems as if it would be entirely possible to simply flash the BIOS of the cheaper card with the 3870's BIOS?
DOM
11-27-2007, 12:39 PM
no, there not the same DDR3 and DDR4 and they are not the same layout the 3870 has better parts on the card then the 3850
trog100
11-27-2007, 01:32 PM
no, there not the same DDR3 and DDR4 and they are not the same layout the 3870 has better parts on the card then the 3850

agreed.. the the 3850 aint just a bios crippled 3870.. no easy upgrade here..

trog
-=CrAnSwIcK=-
11-27-2007, 01:33 PM
lol, good luck getting your GDDR3 to run anywhere near 2ghz...but yeah, the answer is no...and for the core, they are the same, now i have seen HD 3870's hit 920mhz core with the BIOS hack i guess you'd call it, but i'm sure on liquid cooling and a similar BIOS hack you could get a decent OC on a 3850
Xaser04
11-27-2007, 02:43 PM
I think the laughs on you.

My 3850 runs crysis quite happily at 750/2098 despite running GDDR3 memory.

It will also bench at 2198 on the memory which is the max the CCC overdrive will allow.
-=CrAnSwIcK=-
11-27-2007, 07:03 PM
which version do you have...cause stock they're supposed to run the mem at 1.6ghz, 1600mhz to 2100mhz is a 500mhz overclock on GDDR3...but regardless of how far you can clock it, it would not be wise to flash to 3870 as the memory types are different no matter what clocks they are running at...why don't you just overclock...why do you need to flash it??
erocker
11-27-2007, 09:09 PM
There are some 3850's coming out with 512mb of memory that might work.
Ripper3
11-27-2007, 10:20 PM
which version do you have...cause stock they're supposed to run the mem at 1.6ghz, 1600mhz to 2100mhz is a 500mhz overclock on GDDR3...but regardless of how far you can clock it, it would not be wise to flash to 3870 as the memory types are different no matter what clocks they are running at...why don't you just overclock...why do you need to flash it??

The reason si there's the BIOS that alloows higher OCs on 3870s, while the same lock is very very likely applied to 3850s. I haven't seen the version of the BIOS for the 3850 though.

Oh, and GDDR3 has plenty of life in it. With a vmod, my 8600GTS can run its GDDR3 at 2.4GHz, but I leave it just over 2.3GHz for regular usage, while the RAM itself is rated at 1ns, I believe, being a native 2GHz.