[Jeffro64]

Got it figured out.... My ASUS board didn't like the USB thumb drive I was using. I switched to another and it worked just fine.

As for flashing the cards well that's another story.... thought I had bricked them both LOL. I did one before noticing that this thread was for a 4870... not a 4870 x2, so needless to say it didn't work. So I got the other card out and was going to put the stock bios's back on the other card which was now put in the second PCIe slot... All went well so I thought. Now I discovered that neither card was working!

Long story short... when I had both cards hooked up, ATIFlash put the second card as 0 and 1... the first card was 2 and 3, so everything was ass backwards and not only the cards but master and slave. So after pulling my hair out and going to Fry's to get a PCI card... then figuring out how everything was ass backwards I now have both cards back to stock up and running fine.

I will attemp it again but not tonight and hope all goes well now that I know a little more about this LOL. Oh... And yes I now have the 4870 x2 master and slave bios's thanks to Frank pointing me in the right direction.

[V2-V3]

Originally Posted by Jeffro64

Got it figured out.... My ASUS board didn't like the USB thumb drive I was using. I switched to another and it worked just fine.

As for flashing the cards well that's another story.... thought I had bricked them both LOL. I did one before noticing that this thread was for a 4870... not a 4870 x2, so needless to say it didn't work. So I got the other card out and was going to put the stock bios's back on the other card which was now put in the second PCIe slot... All went well so I thought. Now I discovered that neither card was working!

Long story short... when I had both cards hooked up, ATIFlash put the second card as 0 and 1... the first card was 2 and 3, so everything was ass backwards and not only the cards but master and slave. So after pulling my hair out and going to Fry's to get a PCI card... then figuring out how everything was ass backwards I now have both cards back to stock up and running fine.

I will attemp it again but not tonight and hope all goes well now that I know a little more about this LOL. Oh... And yes I now have the 4870 x2 master and slave bios's thanks to Frank pointing me in the right direction.

Jeffro,

I am very sorry i did not find your post sooner!

yes the bios in this guide is not for the 4870x2 it is only for the single GPU 4870 512MB version

you are correct, the 4870x2 has 2 BIOS chips, one Master and one Slave and they are not interchangeable!!!

and you need to know the device location on the PCI bus each bios has a unique location and if you have more than one video card.
usually if you have 2 4870x2's your locations would look like this:

(PCIE slot 1: Physical video card) Primary GPU: Master BIOS Device 0 Slave BIOS Device 1



(PCIE slot 3: Physical video card) Secondary GPU: Master BIOS Device 2 Slave BIOS Device 3

the ASUS TOP BIOS for the 4870x2 allows for 900MHz Core and 1100MHz GDDR clock frequency limits in Catalyst Control Center Overdrive Overclocking.

the Default ASUS TOP 4870x2 Clocks are 790MHz Core and 915MHz RAM

The GPU Core voltage is also higher in the top so once you flash to top you can usually get much better clocks on any cooling.

also the Memory timings are more loose with the ASUS TOP BIOS and allow for higer stable frequencies on the GDDR5 memory modules.



I will post a 4870x2 BIOS Flashing guide to assist you!