USB performance
Our USB transfer speed tests were conducted with a USB 2.0/Firewire external hard drive enclosure connected to a 7,200-RPM Seagate Barracuda 7200.7 hard drive. We tested with HD Tach 3.01's 8MB zone setting.

Although its CPU utilization isn't the lowest of the lot, the GeForce 9300 boasts the best all-around USB performance of any integrated graphics chipset. Most impressive is the GeForce's write speeds, which are 3MB/s faster than those of its closest competitors.

PCI Express performance
We used ntttcp to test PCI Express Ethernet throughput using a Marvell 88E8052-based PCI Express x1 Gigabit Ethernet card.

PCI Express Ethernet throughput doesn't vary much from one chipset to the next, but the GeForce 9300's CPU utilization in this test is a little higher than some of the other chipsets.

PCI performance
To test PCI performance, we used the same ntttcp test methods and a PCI VIA Velocity GigE NIC.

The GeForce 9300's PCI Ethernet throughput and CPU utilization put it in the middle of the pack.