ATI 3850/3870 Voltmod thread

[Random Murderer]

Ok I've found a solution for Gigabyte HD3870 512MB DDR3 Qimonda....
Original Ver 70 locked bios 1.22V

at 859/2100Mhz

Used a Sapphire 3850 512MB DDR3 Qimonda Bios
Ver 71 Unlocked Bios 1.22V ( http://www.techpowerup.com/vgabios/2...12.071108.html )

+ Editor to set 1.22V 2D and 1.32V 3D And now I got 1.38V in Multimeter
@895/2100Mhz

( http://www.computerbase.de/downloads...tor/?url=17592 )

so gigabyte is marketing 512 3850's as 3870's? for shame.

[Barr3l Rid3r]

so gigabyte is marketing 512 3850's as 3870's? for shame.

well not really, 3850 used to have one less phase and not all solid capacitors, this 3870 is very robust and follow gigabyte ultra durable reference but comes w/ DDR3 1.0ns, Gigabyte 3850 comes w/ hynix 1.4ns and less components on pcb.

[Clint]

well not really, 3850 used to have one less phase and not all solid capacitors, this 3870 is very robust and follow gigabyte ultra durable reference but comes w/ DDR3 1.0ns, Gigabyte 3850 comes w/ hynix 1.4ns and less components on pcb.

From what I can tell there is same amount of components but on the 3850 there are three capacitors that is of lower capacity. I'm planning to replace those with the same spec'ed capacitors as the 3870 have.

Cost will be a couple of $.

[Barr3l Rid3r]

From what I can tell there is same amount of components but on the 3850 there are three capacitors that is of lower capacity. I'm planning to replace those with the same spec'ed capacitors as the 3870 have.

Cost will be a couple of $.

Can u hit 850Mhz in yours already? If not maybe I can help... but Gigabyte will be the only one that can provide a unlocked bios for your card since no other card use hynix 1.4ns...

[JamesBong420]

yahoooo just hit 1053mhz core on my 256meg msi 3850....
thanks to some caps and of coarse shaminos OCP mod!! now i just need to get these mosfets colder.




SINGLE CARD
13k 06
1053mhz/1053mhz 1.65v Gpu
e4500@3.82ghz.
such a cheap setup im more then happy!!!
http://service.futuremark.com/compare?3dm06=5245969

3dmark 05
21250
http://service.futuremark.com/compare?3dm05=4010657