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Arbico has opted for an AMD processor to keep costs down – in this case, a dual-core 3.2GHz Phenom II X2 555 . Along with 4GB of RAM, this provides enough power for most applications, even though it lagged behind similarly priced Core i3-equipped PCs in our benchmarks. Plus, with a 1TB hard disk and you have enough storage space to keep a vast library of music, videos and photos.
At this price, we didn’t expect to find a dedicated graphics card. Sure enough, the AMD CS555 has an integrated Nvidia chipset that can handle HD video decoding, but it won’t play 3D games unless they’re very old. It also has only a VGA output; we’d have liked to see at least a DVI port. There’s a spare PCI-E x16 slot, so you could add a powerful graphics card at a later date. There’s plenty of room, although a double-width card will block the only PCI-E x1 slot. Also, the 500W EZCool power supply should have enough headroom to handle a powerful graphics card, unlike some of the budget PSUs we’ve seen in other PCs.
There are also two PCI slots for older expansion cards and, if you want to add more hard disks or optical drives there’s space for four more. Unfortunately there are only two spare SATA ports. The 4GB of memory occupies both slots, so if you wanted to add more you’d have to replace the existing modules. For most people, 4GB is more than enough.
Expansion is also limited on the exterior. Even though the motherboard supports a maximum of ten USB ports, Arbico has fitted six in total – two inconveniently situated at the bottom of the front panel, and four more on the rear. One of these is used by the keyboard and mouse set’s USB dongle, so you end up with only five. There’s no support for faster interfaces such as eSATA or USB3. There are parallel and serial ports, but these will only appeal to those who have very old equipment lying around. 
Despite great build quality and a generous two-year warranty, we can’t recommend the AMD CS555. The limited expansion and small number of USB ports is restrictive, even at this price, try the OP3 Mars instead.
