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GECUBE's Dual GPU Gemini 3 - Sneak Peek!

GECUBE recently let us come and play with their dual GPU HD 2600 XT based card. We test both single and dual GPU modes.
By: Lars Göran Nilsson | AMD Radeon GPU in Video Cards | Posted: Aug 28, 2007 4:00 am

First Looks


Remember the Gemini 3 from GECUBE? If not, let us refresh your memory. The Gemini 3 is the second dual GPU card from GECUBE, the previous one was the Gemini 2 and it was based on a pair of Radeon X1650 XTs. The Gemini 3 features a pair of Radeon HD 2600 XT GPUs and they're clocked at 800MHz. Each GPU is paired with 256MB of 500MHz DDR2 memory (1GHz effectively).



This might not sound like anything all too remarkable so far, but it seems like GECUBE will beat all the other AMD partners that are working on dual GPU cards, by simply being the first to market. GECUBE is expecting the Gemini 3 to be available in retail some time next month, but we weren't given an exact launch date or a price for that matter.



Another cool feature is of course that you can output to four displays from the Gemini 3, and all four ports are DVI as well. Port two and four are also compatible with HDMI via a dongle and will output a HDCP encoded signal to HDTVs. The card also has analog video-out over S-Video, composite and component. Although the card was running four HD streams when we got to the GECUBE offices, it was really struggling and it was dropping frames. However, it doesn't have any problem playing dual HD streams which some might find useful.



Unlike some other designs we've seen, GECUBE have done a really neat job of the four connectors by adding a small PCB which is connected to the card itself. Since the cooler is double width, this means that you're not wasting any rear space on your system either.



You might wonder how hot this card runs, as dual GPU cards in the past have been running really hot. Well, even after several hours of benchmarking (albeit on an open platform) the card was just warm to the touch. GECUBE has done a great job with the cooler here, although it was quite noisy.



The memory chips on the sample board we tested were rated at 2.5ns, but production boards will use 2.0ns chips. This should allow for some overclocking, although we're still hoping for a version with GDDR3 or GDDR4 in the future. Another thing you'll notice is that this card doesn't have any Crossfire connectors like the Sapphire card, so quad Crossfire is a no go with the card. On the upside, it's only using a single 6-pin PCI Express power connector, so it doesn't draw all that much power.




There's very little to get excited about around the back of the card, the memory modules are covered by a large heatsink attached to the front, but not with a heatpipe, just a piece of metal.



The trick of this card is the PLX PCI Express switch chip, this allowing the two GPUs to work in Crossfire mode. The other two chips you can see on the picture above are the GPUs. It's actually quite amazing how compact this card is compared to some of the other samples we saw back at Computex earlier in the year, although none of those were final production models as far as we know.


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