Computers & Electronics

HD5770 & Onboard HD4250 cross-fire?

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  • Oct 11th, 2010 9:08 am
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Deal Fanatic
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Apr 4, 2009
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North York

HD5770 & Onboard HD4250 cross-fire?

Can the two video cars cross fire? (Seems like it ...)

I have a Asus M4A88TD-V EVO/USB3 motherboard with a HD4250 onboard. I also have a HD5770 card installed too.

After reading and re-reading the MB manual, I was able to get both card working simultaneously. I pulled the 2nd monitor from the HD5770 and connected it to the onboard DVI port.

I assumed without CCC running and setting up an Xfire config, they would be independent. Each driving their own monitor.

I am running Afterburner to monitor the GPUs. The HD5770 appears to be providing GPU assistance even though the 3-D graphics is on the 2nd monitor.

I am using the Afterburner KOMBUSTOR to test.

Kombustor on main screen (attached to discret HD5770) ~280FPS. (HD5770 GPU = 98%, HD4250 GPUs=7%,7%)
Kombustor on 2nd screen (attached to onboard HD4250) ~120FPS. (HD5770 GPU = 61%, HD4250 GPUs=21%,21%)

Are the cards working in cross fire?

Also, why is Afterburner showing the HD4250 as 2 GPUs? (2 GPU %, 2 GPU Core Clocks, 2 GPU Memory Clocks).

Another thing I noticed is Afterburner is unable to flip to my OC profile settings now. (Stock/base = 875/1225, OC Profile = 975/1375)
7 replies
Deal Fanatic
Oct 1, 2004
5862 posts
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Busybuyer888 wrote: Can the two video cars cross fire? (Seems like it ...)
No.
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Sr. Member
Feb 7, 2009
568 posts
73 upvotes
Your 5770 is so much more powerful than the 4250 that even if you can crossfire (which you can't), the increase is negligible.
Deal Fanatic
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Apr 4, 2009
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North York
Okay ... I did further testing with actual games. Perhaps, there is no XFIRE going on.

It seems by off-loading the 2nd screen to the onboard video card, my frame rates may have gone up one or two frames (on HAWX), no change in DIRT2.

I couldn't test the games running on the HD4250, as I could not select them from the games!

Enabling the 2nd card did appear to make my HD5770 975/1375 overclocking less stable in the games.

I guess, it is nice to know I can use the onboard video simultaneously to get additional monitors (ie. 3rd, 4th).
Deal Fanatic
Oct 1, 2004
5862 posts
268 upvotes
That's just the product of running 2 GPUs (Onboard + Discrete).

It's the same as adding 7 single slot GPUs and running them to get many monitors. They won't crossfire/sli but they'll work independently of each other.
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Deal Guru
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Nov 21, 2002
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Winnipeg
isn't combining the onboard video with a vid card known as hybrid technology. I thought it only worked with the hd3xxx series and was discontinued. The advantages wasn't so much the extra boost but the disabling of the vid card for non-intensive apps and lowering power consumption at idle. I have a 3450 and a ta760g. It's supposed to work but never tried it myself.
Sr. Member
Apr 8, 2010
831 posts
285 upvotes
London
I had the same question - I have an Asus M4A78L-M which has a Radeon 3000 series IGPU plus a Radeon 5450 video card. It seems that Hybrid CrossfireX is pretty much a pointless technology these days when you can pick up graphics cards for so cheap. You have a 5770 which is only going to receive a performance boost from another 5770, anything else won't keep up!

Anyway I dug out the links I used to come to this conclusion, hope they help:

Just for laughs: Ridiculous article that I found on google:
http://www.ehow.com/how_6139640_turn-hy ... re-xp.html

Good for low end cards:
http://www.hexus.net/content/item.php?item=14321&page=9
http://forums.techarena.in/monitor-vide ... 328012.htm
http://hardforum.com/showthread.php?t=1551656

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