[WoofWoof]

Hey guys, just wanted to start a thread like this so others with this card could find a way to raise the core a little more.

I used to be dazed and confused when it came to overclocking this card as the max I could hit was 900 on the Core(which is ok). As gigabyte decided not to put a VRM that lets you adjust voltage, your stuck with the stock vcore of 1.0v. I became frustrated and wished to push this card to the max without hard modding it. So be it I ran across the "flashing 5850 to 5870" thread.

The Gigabyte GV-R5850C-1GD and GV-R587UD-1GD have the same exact non-reference board, and memory. Since the 5870's come with a stock vcore of 1.16v, it became obvious testing wouldn't hurt.

Anyways this is a help thread for all others with a GV-R5850C-1GD that want to get a little bit higher vcore. I have made a modified GV-R587UD-1GD BIOS with settings for 800Mhz core and 1000Mhz memory. They're so low so you can test and see how far your card can go with software.

AFTER FLASHING:

Normally I could only hit 900mhz on core! anything above was unstable.

 

[mtcn77]

Nice!

 

[allenn]

How's it going, I'm new. I just bought this exact card and I wanted to see if anyone else was successful flashing theirs. I've been reading horror stories about others who have bricked their non-reference, not with this exact card though.

 

[o0whiplash0o]

Time to resurrect a long-dead thread!

I too own one of these cards. I stumbled upon this thread in the hunt for better fps, and I thought I'd add a few pointers to help those who came here via Google.

- I just bought a second one of these cards off of Ebay a few days ago, and successfully flashed both with this BIOS. I run Windows 7 x64, and I've been able to flash both cards trouble-free from within Windows using the Radeon BIOS Editor. Simply load the bios, hit "Acquire/Flash" along the bottom, press "Analyze", and choose the right card. Next, you'll have to check "Force flash" in order to flash the modded BIOS from the OP without error (If you don't, it'll complain that the models don't match up). Once you do that, restart and re-install the CCC drivers and you're ready to overclock!

You should know in advance that the two tips below may potentially increase your power bill by several cents (!) since they both involve reducing some power-saving features built-in to your card.

- If you're running two monitors and you overclock, you will probably get graphical glitches as the memory clock switches frequencies (which is quite often, as it turns out). What can you do about this? It's simple! Change the BIOS so that regardless if it's idling or running at full blast, it will always have the same memory clock. 1000 MHz, to be exact. Using the tool from my last tip, you can change the memory frequencies yourself, or you can just download my modded bios that I've attached. Flash it the same way you'd flash the OP's bios.

- This one's a bit more general, but if you run your cards in crossfire and find it takes a ton of time opening the "Playback Devices" or "Recording Devices" window from the taskbar speaker, you can just follow this thread and that should fix it.

 

[Viking2121]

Hey Thanks for this old Thread, Idc if its old, WoofWoof and o0whiplash0o You da man!!!!!!!!

 

[Viking2121]

So far was able to achieve a bit higher clocks, I was only able to clock my Vram to 1150mhz, now i can hit 1200mhz stable, I havnt really tested to see if i could go any higher, but the core i can now hit 933mhz stable, I was only able to hit 905mhz before. I am currently testing to see if any other clocks are stable. Even tho the overclock isn't much better, it fixed my dual monitor problem I had awhile back, Thanks guyz!

 

[tekdemon]

Sorry to rez a really old thread but does anybody still have this BIOS?