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With a limited budget to work with, Eclipse opted for an AMD Phenom II X2 555 processor for the Eco AP555. This is a dual-core model that runs at 3.2GHz but it trails Core i3-based PCs at the same price. The Eco AP555’s motherboard has a number of modern features however, such as support for both eSATA and USB3. Plus, you get 4GB of RAM and a massive 1TB hard disk. Don’t be fooled by the Eco moniker: the AP555 uses more power than most budget PCs at 114W under load.
An overall score of 92 in our benchmarks is a good score at this price, and it’s capable of handling most applications. Our benchmarks have a reference score of 100, based on a quad-core AMD chip, and the dual-core Athlon here stands out with a lower score in the Video-encoding test. A score of 109 in the single-threaded Image-editing test shows the Eco AP555 is actually faster when it has just one task to process.
There’s 4GB of RAM fitted in two 2GB modules, with two spare slots making upgrades easy. There are also four free expansion slots, one of which is a PCI-E x16 slot for a dedicated graphics card. However, the power supply is rated at 500W, so it may not have enough headroom to handle the most powerful graphics cards available, and its already noticeable hum will become louder the more load is put on it. You’ll also need one or two Molex-to-PCI-E power adaptors for the larger cards that require their own power supply.
Unlike most tower cases, there’s room for only three more drives inside, but there are also only three SATA headers free. Externally, you have two USB ports mounted conveniently in the middle of the front panel, and there are six more on the rear including one USB3 port. There are also FireWire and eSATA ports, so you shouldn’t have any problems connecting fast external drives or other peripherals.
Audio buffs will be pleased to find five 3.5mm sockets that can handle 7.1 surround sound, as well as an optical S/PDIF. Unfortunately you can’t get Blu-ray quality sound via the HDMI port, as the Radeon HD 4290 doesn’t support Protected Audio Path. 
The Eco AP555 is a good PC, but it’s not quite the best value at this price. Its AMD processor can’t match the Core i3 found in the OP3 Mars, which also has a longer three-year warranty.
