The heavyweight among our P55 motherboards (and we mean it literally) is the Gigabyte GA-P55-UD6. Thanks to its Ultra Durable 3 features, which mandates that the amount of copper in the PCB be twice that of the typical PCB and its 'overuse' of chokes for its power phase design, this is one hefty motherboard. The staggering number of features included and the solid heatsinks used also contribute to the overall weight.
While we have done a rather comprehensive preview of this board's numerous features that you should at least glance though for the updates on Gigabyte's newest features and software tools, some of the more important ones bear repeating. Just like the Gigabyte EX58-EXTREME, this is a board stacked with features and the crowded PCB is a clear sign of the added complexity required. With 10 SATA ports onboard, it's hard not to crown this P55 board the champion in storage options for our roundup. Mind you, we're not counting the two USB/eSATA combo ports at the rear. And Gigabyte has thrown in both floppy and IDE controllers to ensure that even the legacy options are there.
Another surprise is the presence of six DIMM slots when the P55 chipset only calls for four. With a dual-channel memory controller on the Lynnfield CPU, we weren't expecting more than the usual four, which makes the six here reminding us again of the EX58-EXTREME. There is however a rather large caveat. If all six slots are populated, the ones in blue can only accept single-sided memory modules, which naturally are not as dense as double-sided ones. So more likely than not, you may end up using 1GB memory modules on these slots. It's certainly limited in its usefulness, perhaps for those with older memory modules lying around.
We have had some issues with some of Gigabyte's larger motherboard heatsinks in the past and the same goes for the UD6. While the heatsinks here are unlikely to interfere with the CPU cooler, there's one that is a touch too close to the PCIe x1 slot (on the right in the picture above). It could be difficult utilizing that slot. The same goes for the PCIe x4 slot at the extreme left, which is close to the floppy connector. To be fair, Gigabyte probably feels that users won't ever end up using all the available expansion slots here. If that's the case, we rather they didn't try so hard in the quantity department and reduce the number of slots or features.
No doubt, we have said this throughout our assessment of the Gigabyte GA-P55-UD6 but it feels that Gigabyte went a bit overboard in terms of the features, especially for a mainstream board. As it is, the online retail price for this board is around US$250, a match for the ASUS and its enthusiast heavy features. There are some minor layout issues that could be improved but given the lack of PCB space, it's probably not as easy as we would presume.