hd 4870 Crossfire issue.

[Rabidpeanut]

Allright.

Now.

I have:

6000+
1x gecube hd4870 512 and 1x force 3d hd4870 512.
An Asus M2R32 MVP motherboard and 4 gig of RAM.
Corsair 750w (900 max output unregulated)

Since ATI's support does not actually exist and i threw money at them for nothing i have come here for help. Their forums don't actually have anyone who knows what the hell is going on.

With my above configuration i get the following problem:

Both cards enabled in crossfire : 147 frames per second in lost coast 40 frames in crysis
1 card enabled : 147 frames per second in lost coast 40 frames in crysis

I have swapped my monitor through all 4 dvi's, of which only 2 (the top card's) have the monitor doing anything, ie if i turn my pc off and use the lower card's dvi's i get nothing, pc goes on, beps 1x and nothing else.

I have tried removing 1 crossfire bridge, i have tried using both.

I am considering swapping the cards to see if anything happens.

I have tried all the new drivers and i can't find anything wrong.

My bios is the newest one i could find to install.

PLEASE HELP ME. I have paid 2x what most people would for pc parts dude to a crappy exchange rate and now i have a pc that costs 4x the level of price performance it should.

I am going to take all the screenshots i can now to help with the diagnostic process.

All the tables say that my pc should work, but it refuses to do anything.

I can't freaking take it anymore. I could have just bought new front shocks and brakes, but instead i have a pc that is 50% white elephant.

[Rabidpeanut]

Need a post to add to my count so i can post you my screens of CPU-z and GPU-Z and CCC

[Rabidpeanut]

Need another post to add to my count so i can post you my screens of CPU-z etc

[Rabidpeanut]

Once again, i need another post, sorry about making such a mess but i need to get this sorted out, i can't belive i dropped R17500 on a pc that does not do what it is supposed to.

[Rabidpeanut]

And the last one: Here we go almost there. Hopefully it is all worth it.

[matty-hodgson]

you could try downloading this first and see if it says that Crossfire is enabled.

if it says it's disabled then you've got a problem.

[Rabidpeanut]

[img=http://www.freeimagehosting.net/uploads/th.d87fd6abc8.jpg]

[img=http://www.freeimagehosting.net/uploads/th.9b1f003b2a.jpg]

Primary Adapter
Graphics Card Manufacturer Built by ATI
Graphics Chipset ATI Radeon HD 4800 Series
Device ID 9440
Vendor 1002

Subsystem ID 0502
Subsystem Vendor ID 1002

Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x16

BIOS Version 011.003.000.001
BIOS Part Number 113-B50701-100
BIOS Date 2008/06/09

Memory Size 512 MB
Memory Type GDDR5

Core Clock in MHz 750 MHz
Memory Clock in MHz 900 MHz
Total Memory Bandwidth in GByte/s 107 GByte/s


Disabled Adapter
Graphics Card Manufacturer Powered by ATI
Graphics Chipset ATI Radeon HD 4800 Series
Device ID 9440
Vendor 1002

Subsystem ID 0502
Subsystem Vendor ID 1771

Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x16

BIOS Version 011.003.000.001
BIOS Part Number 113-BA0701-X05
BIOS Date 2008/08/07

Memory Size 512 MB
Memory Type GDDR5

Core Clock in MHz 750 MHz
Memory Clock in MHz 900 MHz
Total Memory Bandwidth in GByte/s 107 GByte/s

[Rabidpeanut]

GPU-z says enabled. Thus i must have a much bigger problem, cause if everything points towards crossfire working, but it does not actually work, then i don't know what the hell could possibly be wrong.

This situation fails so hard.

[Splash]

Secondary adapter says disabled - what does it say in device manager?

[Rabidpeanut]

It says it's enabled, but i have always had 2 errors in my device manager that i have never been able to enable. I have never been able to get the 'unkown device running, i dont know what it is, but i suspect it might be cool 'n quiet.

[img=http://www.freeimagehosting.net/uploads/th.898f5ce474.jpg]

[Rabidpeanut]

It turns out that unknown is for my audio, which on this board is actually just an improperly made afterthought that does not actually work at all.

[Rabidpeanut]

I notice that the drivers of each card appear to be different, one is the actual driver file, the other is catalyst, but i have already uninstalled drivers multiple times and cleaned them off using DC Pro. So i have no clue what the heck i must do.

[Splash]

Have you unintsalled both devices through dev manager (both cards) as well as the drivers and catalyst drivers, then restarted and reinstalled?

[Rabidpeanut]

My IRQ's for each card are different. I am pretty sure that this is the problem, cause crossfire requires IRQ sharing, one is 19 and the other is 18. I am going to go and find out how to mess with this, unless someone here knows how.

To Splash, nope, but i have just discovered that my IRQ's for the broken audio device and for one of my cards are the same, so i am going to try to change the audio irq in the bios and get both of my PCI-es to be IRQ 18 and that should fix things hopefully.

[Splash]

Chances are that the IRQs are a red herring - bear in mind that the HD4870 supports sound via HDMI.

EDIT - just checked my machine and I have 2 High Definition Audio Devices (one for each of my cards)

[Rabidpeanut]

I have uninstalled everything and i am going to try again, there are only 15 irq's on this board which means that i wont be able to change anything cause it is all on the software layer now. Hopefully the uninstallation of the sound/botth cards manually in dev manager will have done the trick. They really have to sort their products out before they market them.