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With the Windows 8 RTM now available through official avenues, AMD has updated its display drivers to offer the first unified Catalyst release for Microsoft's last three operating systems. Radeon users running Windows 8 will benefit from support for DirectX 11.1 and Windows Display Driver Model (WDDM) 1.2 which includes the following (as a reminder, the Radeon HD 4000 series isn't fully supported on Windows 8):
Folks upgrading from June's Catalyst 12.6 package can expect a handful of performance improvements, including up to 25% more frames in TES V: Skyrim, 15% in Total War: Shogun 2, 10% in Dirt 3, 8% in Crysis Warhead, 6% in Crysis 2 and Batman: Arkham City, as well as 3-5% in Just Cause 2, Deus Ex: Human Revolution, and Battlefield 3. The update also fixes more bugs can we can cover, so skim the release notes.
Download Catalyst 12.8 WHQL (release notes)
Desktop: Windows XP 32-bit | Windows XP 64-bit | Windows Vista/7/8 32-bit | Windows Vista/7/8 64-bit
Mobile: Windows Vista/7/8 32-bit | Windows Vista/7/8 64-bit
Along with those enhancements, AMD has also responded to the launch of the GeForce GTX 660 Ti with word of a firmware update for the Radeon HD 7950, which is currently in a tight spot between Nvidia's $300 and $400 offerings. Similar to how AMD released the slightly overclocked HD 7970 GHz Edition to address the GTX 680, this week's BIOS update pushes the HD 7950's clock from 800MHz to 850MHz. The update also introduces a "Boost" functionality that can dynamically push the clock to 925MHz.
You can download the new firmware here, but if you're running a card that deviates from AMD's reference design, you'll probably want to hold off until your card maker offers its own version. The company says it can't guarantee that the update will work with third-party boards and you'll void your warranty upon flashing, so proceed at your own risk. For the less experimental types, you can already buy "Boost Edition" HD 7950s with the latest BIOS. For a before and after, check out ExtremeTech's benches:
The AMD ATI Radeon HD 7970 measures 27 cm long (10.6 in), the GPU core is clocked at 925MHz, and the GDDR5 memory operates at the same frequency of 1375MHz (5.5GHz DDR). Still, pairing that frequency with a 384-bit memory bus gives the HD 7970 264GB/s of theoretical bandwidth. The HD 7970 carries 2048 SPUs, 128 TAUs and 32 ROPs, up 33% from 1536 SPUs and 96 TAUs, it's also the first PCI Express 3.0-compatible card.
The HD 7950 has 2048 SPUs, 128 TAUs and 32 ROPs. The only other ports are on the I/O panel where you'll find a dual DL-DVI connector, a single HDMI 1.4a port, and two mini-DisplayPort 1.2 sockets. Supports a max resolution of 2560x1600 on up to 3 monitors.
The AMD ATI Radeon HD 7870 measures 24cm long (9.4 in). The GPU core is clocked at 1000MHz and the GDDR5 memory operates at 1200MHz (4.8GHz DDR), The HD 7870 carries 1280 SPUs, 80 TAUs and 32 ROPs, it also adopts the 28nm design process and is PCI Express 3.0-compatible.
The AMD ATI Radeon HD 7850 measures 24cm (9.4 in) long. The core clock frequency of the AMD ATI Radeon HD 7850 has been lowered from 1GHz to 860MHz. The GDDR5 memory still works at 1.2GHz, which is effectively 4.8GHz DDR. The HD 7850 has 1024 SPUs and 64 TAUs, while the ROPs remain at 32. It is also PCI Express 3.0-compatible
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