I have the 6850 with 1GB of RAM and a few games would definitely do better with 2GB at 1080p. A few prime examples would be Skyrim with the high res texture pack and Battlefield 3 with MSAA or any other AA features enabled.
The single card, for many reasons, including: less heat, less power consumption, less airflow constriction, less need for multiple power connectors (usually), more consistent performance (multi-card setups are very variable and rely a great deal on driver optimization), and the ability to add a second card later when it drops in price.
I also have a 5770 and I'm looking at this card. I just don't know if I should wait for a deal on a 2gb version or wait until black friday or something. My 5770 is fine but it doesn't have dual-link dvi for my 27" monitor and I would really like to utilize it for my desktop (currently using it for my macbook air).
FYI guys, this card does not get lifetime warranty.
"Which products are eligible for a limited lifetime hardware warranty?
The following Graphics Cards are eligible for an extension of the standard two-year limited hardware warranty:
1. XFX Radeon HD 7000 Series Dual Fan (Double Dissipation Edition) Graphics Cards with Ghost Technology; a floating cover design that maximizes airflow by creating exceptional venting throughout the card.
2. XFX Radeon HD 7000 Series Graphics Cards with 10-digit model numbers ending in “R” (example: “FX-797A-TDFR”)
3. XFX Radeon HD 6000, HD 5000, and HD 4000 Series Graphics Cards
4. XFX GeForce GT 520, GT 430, 200, 9000, 8000, 7000, 6000 Series Graphics Cards purchased after April 17, 2007."
Do you have the latest motherboard chipset? HD4000 series supports up to 3 monitors[anandtech.com] assuming your motherboard has sufficient DVI/HDMI/VGA/DisplayPort IO. You may need some adapters since not all monitors support HDMI or DisplayPort.
Intel graphics does not support dual-link DVI, therefore 1920x1200 is the maximum for DVI and HDMI, 2560x1600 is only possible with a displayport port. The resolutions available on each video port are limited by the motherboard manufacturer. Check the website of your motherboard but it should be fine as long as you use DVI/HDMI/DisplayPort of your motherboard.
"Theoretically, a desktop system on an Ivy Bridge processor can offer three outs: the first one - a universal out (HDMI, DVI, VGA or DisplayPort) with maximum resolution of 1920x1200, the second one – a DisplayPort, HDMI or DVI with up to 1920x1200 resolution, and the third one – a DisplayPort supporting higher resolutions up to 2560x1600. The internal architecture of the Ivy Bridge HD 4000 video can support 3 ports (and they could all be DispayPorts if desired), but, only one port (which has to be a DisplayPort) is capable of 2560x1600 resolution. The other two outputs from HD 4000 are limited to 1920x1200. " ~ Source[dpreview.com]
For example, see how this motherboard[newegg.com] has HDMI, VGA (blue port) and DVI (white port)? That means it supports 3 monitors off HD4000. You want to avoid mixing VGA and a digital connection (HDMI or DVI) as the colors will look different. If you need an HDMI-to-DVI adapter[monoprice.com], look for one at MonoPrice. This way you can easily set up a 2x 1920x1200 setup with DVI for monitor 1 and HDMI-to-DVI cable for monitor 2.
Bestjinjo> Tks for the advice! I do have a motherboard that supports multiple video output (Asrock Z77 Pro4). So I will be able to run dual display on this config. From your point of view, do you think the HD 4000 is adequate to run MS Office and some light Photoshop or will it be too slow?
Negative. You don't add up the video RAM on multiple cards like that. CrossFireX'ing or SLI'ing two 1 GB cards still only gives a useable frame buffer of 1 GB, not 1+1=2. Running at higher resolutions might still be possible unless the game starts to choke on not enough vRAM.
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