Board layout
All those integrated peripherals make for a crowded layout, but Chaintech's engineers somehow manage to squeeze everything onto the board.

The ZNF3-150's dark brown board is offset by a collection of bright orange slots and ports that gives the board an almost 70s feel. The aesthetic certainly won't be for everyone, but the board's brown coloring is thankfully dark enough to pass for black under most lighting.

Though it feels a little nitpicky, I have to point out that the ZNF3-150's power plug placement is less than ideal. The main power plug is conveniently located along the edge of the board, but the secondary 4-pin power plug is buried between the AGP slot and CPU socket, which creates additional cable clutter around the processor cooler.

Chaintech gets props for speccing the ZNF3-150 with a heat sink retention bracket. Manufacturers aren't required to ship Socket 754 boards with AMD's new heat sink retention bracket, and some heat sinks may not come with the all the necessary mounting hardware, so it's nice to see Chaintech throw the bracket in as a little something extra. Thanks to this bracket, the ZNF3-150 has plenty of room around the CPU socket for larger heat sinks. One of the bracket's edges pushes up against a row of taller capacitors, which could create clearance problems for larger passive heat sinks, but the board should easily accommodate standard Socket 754 heat sinks.

Speaking of clearance, the ZNF3-150 has just enough room between its AGP and DIMM slots to allow for swapping out memory modules without removing a system's graphics card.

Like just about every Socket 754 board on the market, the ZNF3-150 has three DIMM slots and supports up to 2GB of DDR400 SDRAM. AMD's 64-bit processors are capable of addressing more than 4GB of memory, but for some reason many Socket 754 boards are rolling out with 2GB memory limits. 2GB should be enough for the Athlon 64's more mainstream target market, but it would still be nice to see a higher memory size ceiling.

Thanks to NVIDIA's nForce3 150 chipset, the ZNF3-150 has three ATA/133 IDE ports—one more than most motherboards.

As Serial ATA begins to replace "parallel" ATA devices, the ZNF3-150's extra ATA/133 port seems a little excessive. However, Chaintech covers the SATA angle with four ports fed by a controller from Silicon Image. The ports are located along the bottom edge of the board, which might have created routing and reach problems for standard IDE ribbons, but is no problem for thin and flexible SATA cables.

Without the finned exhaust port, the ZNF3-150's rear port cluster looks pretty pedestrian. In addition to PS/2, parallel, and serial ports, the cluster has a couple of USB ports, three analog audio jacks, and an Ethernet port. I'll get to those fins in a bit, but I'm not quite done with the ports yet.

To pick up a few ports that it misses in the rear cluster, Chaintech includes a CMR (Chaintech Multimedia Riser) card. The riser contains one of the board's codec chips, its digital S/PDIF output, and analog center, rear, and surround output ports. A couple of Firewire ports also grace the CMR card, which nicely fits into a special slot on the board that doesn't block any PCI slots.