Just got a Second video card

[Pyong Kawaguchi]

Just got a second video card, its nice too!
Any special drivers or anything to set up crossfire besides a single crossfire bridge?

[Pyong Kawaguchi]

I checked the information and got the following:

Primary Adapter
Graphics Card Manufacturer Powered by ATI
Graphics Chipset ATI Radeon HD 4800 Series
Device ID 9460
Vendor 1002

Subsystem ID E115
Subsystem Vendor ID 174B

Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x8

BIOS Version 011.022.000.004
BIOS Part Number 113-BA9102-V07
BIOS Date 2009/09/21

Memory Size 1024 MB
Memory Type GDDR5

Core Clock in MHz 870 MHz
Memory Clock in MHz 1050 MHz
Total Memory Bandwidth in GByte/s 134.4 GByte/s


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

Subsystem ID 01FC
Subsystem Vendor ID 1043

Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x8

BIOS Version 011.007.000.000
BIOS Part Number 113-AB67800-102
BIOS Date 2008/08/12

Memory Size 2303 MB
Memory Type HyperMemory

Core Clock in MHz 750 MHz
Memory Clock in MHz 900 MHz

Why is the second card disabled?

[StankBacon]

maybe you need to enable crossfire in the ccc

[Pyong Kawaguchi]

Option doesn't show.

[Pyong Kawaguchi]

Bump, anyone have any ideas? I'm getting a second bridge to test and see what happends.

[StankBacon]

http://ati.amd.com/technology/crossfire/software_setup.html

[legionaire45]

Looks like you need two bridges. Weird, because I thought that it would work without the bridges, it would just be slower (going over PCI-express bus instead of between the two cards).

If using two bridges doesn't work, maybe try new drivers?

Also, make sure that both slots are at least 8x - some boards have a second physical PCI-Express 16x slot that is only 1x or 4x electrically.

[Pyong Kawaguchi]

Both slots are running at 8x
I am on a clean install of windows 7 with the latest drivers.
:C

[Warsaw]

You need two bridges. Look at any picture of an ATI card and you'll se that there are two sets of golden teeth for the bridges.

[Pyong Kawaguchi]

Generally the second bridge causes artifacts in some games

[Warsaw]

Generally, having one powerful card/core is preferable to having two because it avoids certain complications.

Pick your poison.

[Pyong Kawaguchi]

I has no budget now :/

[StankBacon]

also im pretty sure your higher end card will be underclocked to run at the same specs as the lower card.

[Pyong Kawaguchi]

From what I read thats not true, then again, I also read you only need one bridge.

[Warsaw]

also im pretty sure your higher end card will be underclocked to run at the same specs as the lower card.

It depends how you set it up. If you have them doing the same operations in parallel, then yes. If you have them doing independent and different operations, then no.

[Amit]

I just bought a Sapphire HD 5750 Vapor-X today for $149.99 CAD at my local computer store. Boxing Day sale is awesome. I just might go back and get another one for crossfire so this thread may be useful for me in the future :D

[Chozenzzz]

Whats your motherboard, and both your video card specs, maybe update CCC drivers could fix the problem. Im pretty sure the cards can be diffrent clocks, but it helps if there the same clock so crossfire can render more evenly across games.

Wierd, But core clocks could be the problem, using riva tuner can fix that though :)

[Pyong Kawaguchi]

My motherboard is the P45t-a (checked to make sure it worked)
I am using the 4890 and the 4870.

[Chozenzzz]

My motherboard is the P45t-a (checked to make sure it worked)
I am using the 4890 and the 4870.

Thats good, I love ATI sense you can crossfire a diffrent verity of cards, and not be locked like jail bait while your a nvidia fan <----

If your crossfire is working, but update drivers, or reinstall drivers completely, that could be the trick. If it dosnt work by then, get GPU-Z and check the slot bandwiths, 1 might be extremely low.

Also go into your bios and check to make sure any settings regarding PCI-E settings, maybe your bios is automaticly disabling the second card because it just a mean motherboard. That might be it to.

[Pyong Kawaguchi]

I checked my bios, nothing about crossfire there, and both cards are at 8x

[Chozenzzz]

I checked my bios, nothing about crossfire there, and both cards are at 8x

Hmm reinstall those drivers and if it still dosnt work then there is something i couldnt think of right of the bat thats wrong :P/.

[Pyong Kawaguchi]

Well the second bridge should come in by next monday hopefully.

[Chozenzzz]

Well the second bridge should come in by next monday hopefully.

Im waiting for a sli bridge so i can pump fps out of my 260's, hey what are the chances :neckbeard:. Ill update here with benches if i get 25,000 3dmark06 or more :D