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XFire Hybrid OB and 5770 - Thoughts?

Last response: in Graphics & Displays
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December 3, 2009 4:32:25 PM

Ok, so I just picked up a 5770 and dropped it into my new MOBO.

SAPPHIRE 100283L Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card - Retail

GIGABYTE GA-MA790GPT-UD3H AM3 AMD 790GX HDMI ATX AMD Motherboard

So this MOBO has the following graphics:

ATI Radeon HD 3300 Graphics
128MB DDR3 SidePort memory

I immediately went and disabled the on-board graphics and was getting ready to install Win7-64bit when I discovered the WD Black 640GB I purchased for the system came DOA. So, I'm the in the process of an RMA with NewEgg when I decided to RTFMs. ;) 

What I came across is that the OB graphics can be Hybrid Cross-Fired with a PCI-E graphics card (i.e. my 5770). I obviously don't have my system totally set up to test this for myself yet but I was wondering if anyone else had experience with this MOBO + card combo or perhaps some other on-board/PCI-e card combo and what you have discovered from your testing.

My first thought was that the OB graphics of the MOBO don't even hold a candle to the 5770 so if anything it will slow my graphics processing down and will actually steal 512MB of system RAM that could be used elsewhere. But then I thought that maybe it was worth trying a Crossfire of the OB and the 5770. Thoughts?
December 3, 2009 4:38:47 PM

hybrid crossfire only supports weak card from ati 3000 series. so far there is no 4000 series or 5000 series cards able to hybrid crossfire with on board graphic
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December 3, 2009 4:44:14 PM

It wouldnt work even with a bios hack due to one being dx11 the other dx10.1, but even if you "could" crossfire these it woudl end up performing FAR worse than a 5770 on its own.
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December 3, 2009 5:31:03 PM

That's what I figured.. Thanks, guys.. It's why I bought the MOBO I did so I can eventually Crossfire another 5770.
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