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BIOS options
Mini-ITX platforms are hardly known for offering tweak-friendly BIOSes primed for overclocking. Zotac doesn't have a stellar reputation for delivering enthusiast-ready BIOSes, either. Surprisingly, though, the 9300-ITX's BIOS has a decent array of tweaking and overclocking options.

Clock speeds FSB: 400-2500MHz in 1MHz increments
DRAM: 400-1400MHz in 1MHz increments
GPU core: 300-1000MHz in 1MHz increments
GPU shader: 1000-2000MHz in 1MHz increments
Multipliers NA
Voltages CPU: +0.02-0.3V in 0.02V increments
DRAM: 1.9-2.1V in 0.01V increments
NB: 1.1-1.25V in 0.05V increments
Monitoring Voltage, fan status, and temperature
Fan speed control CPU

The bulk of the overclocking and tweaking options look like they've been ripped directly from Nvidia's reference BIOS designs, which is a good thing. There are plenty of front-side bus and memory clock options from which to choose, and the BIOS easily lets you key in arbitrary values. The memory clock won't always nail your target exactly, though; it pulls from a selection of available memory speeds and selects the one closest to your input value without going over. Bob Barker would be proud.

On the voltage front, the 9300-ITX's BIOS offers processor, memory, and chipset options to manipulate. The ranges are quite limited here, but you probably shouldn't be cranking voltages for more extreme overclocks on a Mini-ITX motherboard. The platform has its limitations.

Speaking of platform limitations, we couldn't get the board running with our memory at 4-4-4-12-1T timings. This is a problem Nvidia has acknowledged exists with the GeForce 9300, and we've experienced it on Micro ATX boards based on the chipset. While we're talking memory, I should also note that the BIOS has an option to enable the GeForce 9300's Advance Path memory controller feature, which purportedly lowers access latencies.

Given the board's integrated graphics component, it's no surprise to see a range of GPU controls built into the BIOS. Users can adjust the amount of system memory dedicated to the onboard GPU between 16 and 512MB. It's also possible to raise or lower the clock speed of the graphics core and shader CUDA processors.

Those who want their systems to be as silent as they are compact will be pleased to know that the 9300-ITX's BIOS offers a small measure of temperature-based fan speed control. A passive temperature control can be set between 50 and 65°C in 5° increments, governing the temperature at which the processor fan spins up. Although it's not terribly intuitive, the "MCP fan control" offers values between 0 and 15 that control the speed of fans hooked up to the board's secondary fan header.

Specifics on specifications
We've covered the essentials on the GeForce 9300-ITX Wi-Fi, but if you'd like all the key specifications distilled into a single chart, here you go:

CPU support LGA775-based Celeron, Pentium 4/D, Core 2 processors
Chipset Nvidia GeForce 9300
Expansion slots 1 PCI Express x16
Memory 2 240-pin DIMM sockets
Maximum of 8GB of DDR2-667/800/1066 SDRAM
Storage I/O 2 channels 300MB/s Serial ATA with RAID 0, 1 support
Audio 6-channel HD audio via Realtek ALC662 codec
Ports 1 PS/2 keyboard
USB 2.0 with headers for 6 more
1 RJ45 10/100/1000
1 802.11b/g Wi-Fi via VIA VT6656

1 analog front out
1 analog line in/rear out
1 analog mic in/center out

1 digital coaxial S/PDIF out
1 digital TOS-Link S/PDIF out