OVERVIEW We've tested four AMD chipsets for gaming enthusiasts. First up is the Radeon R9 280X. This has a Tahiti XTL or XT2 core, depending on the manufacturer, with 2,048 GPU cores and stock 850MHz core and 1,000MHz boost speeds. The Tahiti XTL and XT2 chips both have the same number of GPU cores and the same clock speeds, but the XT2 variant apparently has some power efficiency improvements. The Radeon R9 285 cards are based on AMD's newest Tonga PRO GPUs, and are the first cards to support AMD's Graphics Core Next (GCN) 1.2 architecture. Where is exponent key in excel for mac free. For example, a base of 4 with an exponent of 3 means that 4 is multiplied by itself 3 times, as in 4 x 4 x 4. An exponent is normally shown as a superscript number to the right of the base, but there is a different way to type exponents in Excel. Keyboard Shortcut. Your Mac supports a superscript keyboard shortcut. First type the entire equation or phrase in normal case in your Microsoft Word or Pages text editor. Then, use your mouse to highlight the portion that needs to turn into an exponent. For users with mobility or vision disabilities, keyboard shortcuts can be easier than using the touchscreen and are an essential alternative to using a mouse. This article itemizes the keyboard shortcuts for Excel for Mac. Many of the shortcuts that use the Ctrl key on a Windows keyboard also work with the Control key in Excel for Mac. Step 1, Open Microsoft Excel on your computer. Find the Excel app in your Applications folder or on your Start menu, and open it.Step 2, Create a new spreadsheet. Click the New button to create a new, blank spreadsheet where you can enter formulas and make calculations. Alternatively, you can open a saved spreadsheet file and work on it.Step 3, Double-click an empty cell. Find an empty cell where you can make your calculations, and double-click on it to edit the cell's contents. Nov 18, 2014 - The Systems: Apple iMac Retina 5K. An AMD R9 280X as our graphics card to give Open CL grunt. GPU: AMD Radeon R9 280X 3GB. Connectivity: 2x USB 3.0 (on CalDigit PCI-E card), 2x eSATA 6GB/s (on CalDigit. Jack, 1x 1/8″ Audio Line In, 2x Ethernet, 2x Mini Display Port, 1x HDMI, 1x DVI. Buy AMD RADEON R9 280X 3GB HDMI PCI Express Video Graphics Card for MAC PRO. ATI Radeon HD 4870 Graphics Upgrade Kit for Apple Mac Pro. According to Wikipedia, this brings 'improved tessellation performance, lossless delta colour compression in order to reduce memory bandwidth usage, [and] an updated and more efficient instruction set'. The R9 285 cards we've tested all have 2GB of GDDR5 RAM, compared to the 3GB in the mid-range R9 280, and have the same 1,792 GPU cores. AMD's stock R9 285 speed is 918MHz. The R9 290 is significantly more expensive than the R9 285, but is a big step up in terms of specification. You get 2,560 GPU cores, 4GB of GDDR5 memory and a 947MHz core clock speed. Finally, there's the most powerful card we've tested: the R9 290X. This has a huge 2,816 GPU cores running at 1,080MHz, and is a rival for the top-end Nvidia GTX 970 cards. Card Rating Award Price inc VAT Supplier XFX Radeon R9 280X Double Dissipation Black Edition 5 Best Buy £186 Asus Strix R9 285 3 £207 Club3D Radeon R9 285 royalQueen 3 £187 Sapphire R9 285 2GB GDDR5 ITX Compact Edition 4 £185 XFX AMD Radeon R9 290 Black Double Dissipation Edition 5 Recommended £242 Sapphire VAPOR-X R9 290X 4GB GDDR5 TRI-X OC 4 £273 INDIVIDUAL CARDS Radeon R9 280X The XFX Radeon R9 280X is a very big card; at 295mm long it's only slightly shorter than the huge Sapphire R9 290X, so measure your case carefully. The card needs both six-pin and eight-pin PCI Express power connectors, so you'll need a decent power supply. The R9 280X has one dual-link and one single-link DVI port, HDMI and twin Mini DisplayPort sockets, so you may need a Mini DisplayPort to DisplayPort adaptor (around £10 from ) to plug into your DisplayPort monitor. The R9 280X was seriously impressive in our tests. It could play Dirt Showdown smoothly at 3,840x2,160 at almost 42fps, had no problem with Tomb Raider at 2,560x1,440 with Ultra quality and demanding SSAA switched on, and could just about play Tomb Raider smoothly at 3,840x2,160 using the FXAA rather than SSAA anti-aliasing technique, with a 30.5fps average. In the highly challenging Metro: Last Light Redux benchmark, we saw a playable 35.3fps average at 1,920x1,080 with Very High quality and SSAA enabled. Disabling SSAA at this resolution gave us a silky-smooth 59.8fps, and even at 2,560x1,440 we still saw a playable 39.8fps. Radeon R9 285 We have three cards based on AMD's newer R9 285 chipset. The Asus Strix R9 285 is the largest model, at 269mm long, and also the tallest, at 126mm high. This is due to a huge twin-fan cooler, which is almost silent when the graphics card is running at idle, but builds to a low rush under heavy load. The Club3D R9 285 royalQueen is smaller, at 218mm long, and also has twin cooling fans. However, this is a much noisier card than the Asus model under load when the twin fans spin up.
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