Second and unused DVI port - on motherboard

Never mind: According to HP's specs for that system family - http://h20000.www2.hp.com...91693&prodTypeId=12454 - the 3130 uses Intel's H57 Express Chipset, which does not have integrated graphics. http://www.intel.com/prod...s/h57/h57-overview.htm The graphics are provided by either a dedicated graphics expansion card or an Intel CPU that includes Intel HD Graphics. For LGA 1156, only certain Intel CPUs have iHD: http://ark.intel.com/Compare.aspx?ids=43546,42915, Lynnfield does not have iHD, but Clarkdale does (well... technically it has a separate graphics + IMC die on-package). Intel created the new "single chip" chipsets for the Core i series to be able to pass-through graphics integrated on the CPU package even though initial SKUs did not have this capability (the two core revisions were released mere months apart). But because HP used both core revisions with the same hardware shell, they included the physical display ports on the back panel in case the system was configured with Clarkdale. The confusion in this case was caused by Intel, not HP. As to why Intel did this, well... Lynnfield was a "tock" release, so Intel stuck to designing ONLY a new microarchitecture on an old FAB process: 45nm. It would have been too costly to put two 45nm dies on the same package. With Clarkdale, Intel moved to 32nm for the CPU core. MUCH easier to put a 32nm and a 45nm die on the same package. (Although, in terms of performance, this pulled the IMC away from the CPU die and pushed it to the separate graphics die, thereby cutting off certain advantages to having the "uncore" coupled with the execution units.)