The 980 series, “the highest-performing Dell OptiPlex desktop ever”, comes with the Intel Pentium, or Core i3, i5 and i7 processor, up to the i7-870. The PC features the Intel GMA HD integrated graphics or optionally a dedicated video card: the ATI RADEON HD 3450/4550 or NVIDIA GeForce 9300/GT330/NVS420.

The 580 mainstream business desktop includes an AMD Sempron, Athlon II, or Phenom II CPU and the ATI Radeon 4200 integrated or Radeon 3450/3470/4550 and NVIDIA NVS420 dedicated graphics.

Both PCs are available in standard desktop, mini tower, and small form factor sizes and support up to 16GB of DDR3 memory, and RAID 0/RAID 1 hard drive modes on select models.

The Dell OptiPlex 980 and OptiPlex 580 run Windows 7, Windows Vista or Ubuntu Linux OS and start at $600 and $700 respectively at the Dell online store.

Sources: Dell Optiplex 980, Dell Optiplex 580

Here’s an excerpt from the press release:
“New OptiPlex 780 USFF is world’s smallest fully functional commercial desktop PC with integrated power supply and Intel vPro technology
OptiPlex 780 USFF delivers a more efficient power supply than the HP Compaq dc7900 Ultra-slim and Lenovo ThinkCentre M58p Ultra Small Form Factor business class
New OptiPlex 380 offers greater flexibility with more form factor options than the HP Compaq dx2400 and the Lenovo ThinkCentre A58
Long life-cycle options and support for Dell’s Flex Computing Solutions – Virtual Remote Desktop and On-Demand Desktop Streaming environments”

The Dell OptiPlex 780 USFF is available for order today at prices starting from $629 USD. The OptiPlex 380 is available for order today at prices starting from $329 for the new Desktop, $339 for the Minitower, and $349 USD for the Small Form Factor.

via Dell OptiPlex Desktops.

The system is based on the Intel Q45 chipset and features an Intel Core 2 Quad, Core 2 Duo, Pentium Dual Core or Celeron CPU and up to 8GB of Non-ECC DDR3 1066MHz memory. The OptiPlex 780 is configurable with up to two 3.5- or 2.5-inch storage units, including standard hard drives and solid state drives. The drives can be configured without RAID or in RAID 0 and 1 modes. Optical drive options include a DVD ROM or a DVD burner, but the system can be also configured without optical device.

Regarding graphics, the PC uses the Intel GMA 4500 integrated graphics with a VGA port and optional adapter card with a DVI port, or one of the following dedicated ATI GPUs with 256MB of VRAM: the ATI Radeon HD 3450 (2 VGA /1 TV-out), Radeon HD 3450 (2 DVI /1 TV-out), and Radeon HD 3470 (2 DisplayPort or 1 DisplayPort / 1 DVI).

For networking, there are an on-board Gigabit LAN port, an optional Gigabit LAN card, and an optional 802.11n wireless card.

Along with various display outputs that depend on video card configuration, ports and slots include 8 USB connectors, a Parallel, a Serial, and an eSATA port, as well as a Firewire port via an optional controller card.

The Windows Vista-based PC can be configured with Intel vPro technology, providing advanced remote system management, while for enhanced security customers can choose the Trusted Platform Module (TPM) 1.2 chip and optional full disk encryption on select hard drives.

The OptiPlex 780 is available in three form factors: Mini Tower, Desktop, and Small Form Factor. Besides different chassis sizes and weight, the three versions have different number of media bays and expansion slots, as well as different power supplies. Also, the Mini Tower uses full-height video cards, whereas the Desktop and SFF models come with low-profile cards. The Desktop additionally supports full height card via an optional riser.

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The Dell OptiPlex 780 Mini Tower and OptiPlex 780 Desktop have a base price of $544, while the OptiPlex 780 Small Form Factor starts at $564. The prices include 3 Year Basic Limited Warranty and 3 Year NBD (Next Business Day) On-Site Service.

The PCs can be purchased at the official Dell online store.