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At first glance, the ASUS EAH5870 certainly makes a good case for itself, boasting an 850mhz clock speed, 1GB of onboard RAM, DirectX 11 support and to top it all off, easy overclocking with dedicated utilities.
Thankfully, the EAH5870 mostly lives up to expectations, performing exceptionally well on nearly any modern game you can throw at it. The card even performs well when running extremely modded games such as Skyrim, with frames being consistently high even when the game is burdened with all manner of texture packs etc.
The card also runs very quietly, with fan noise barely perceptible (in a well ventilated rig with many active cooling fans).
It's not all good though, as there is a downside to this. The card's DirectX 11 performance is not great. Tessalation in particular really makes the card chug. For example, on Crysis 2 DirectX 11 mode Tessalation drops the FPS from an almost constant 60, down to 15-20.
Overall though, this is a great card, with good speeds, temperature and noise level.
If you want DirectX 11 however, you are better off going for a 2GB card, or running two EAH5870s in crossfire.
Copper fins + extra large fan for 17% cooler performance! ASUS exclusive Voltage Tweak Technology for up to 50% performance. Equipping with 8.5cm Extra Large Fan & Pure Copper Fins, ASUS delivers 17% cooler performance than reference design. ASUS Splendid: watching movies on PC is as good as on Top-of-the-line consumer television. ASUS Gamer OSD: real-time overclocking, benchmarking and video capturing in any PC game! ASUS Smart Doctor: your intelligent hardware protection and powerful overclocking tool. Gigantic 1GB GDDR5 Memory: on-board memory for the best gaming experience & the best resolution. Radeon HD 5870 40nm GPU: less power consumption & more efficient transistor.
Bring new levels of visual realism to gaming on the PC and get top-notch performance. Enable PC users to enjoy an advanced computing experience and to do more with their PC ATI CrossFire Technology. Get up to 1.8X of a graphics performance boost in dual mode PCI Express 2.1 support.