how to flash ati radeon hd 4870 x2 for mac pro

In this configuration, the 4870's memory offers about 115.2GB/s of peak memory bandwidth. On the 4870, the GPU is clocked at 750MHz and it is linked to cutting edge GDDR5 DRAMs clocked at 900MHz (1.8GHz x 2 = 3.6Gbps). Until ATI's R700 arrives, which features a pair of RV770 GPUs on a single PCB, ala the Radeon HD 3870 X2, the Radeon HD 4870 is AMD's flagship Radeon HD 4800 series card. Technically, the GPU powering the 4870 is identical to the 4850. However, its implementation on the 4870 is totally different. For one, clock speeds are higher. Pricing for the card is expected to be set at $199.

Included with the card were a driver CD, another CD that contained a copy of 3DMark06, and final pair of discs from Cyberlink with full versions of PowerDVD and DVD Suite, a user's manual, CrossFire bridge, a DVI-to-VGA adapter, a DVI-to-HDMI adapter, a component output dongle, and a 2GB Sapphire-branded flash drive. During our testing, Sapphire sent an updated BIOS for the card that was designed to alter the fan-speed profile and thus lower temperatures, but due to time constraints we were unable to test it.īecause this was a retail-ready product form Sapphire, it also included a full accessory bundle. The drivers reported an idle temperature of around 80'C, and the card was way too hot to touch even while sitting idle at the Windows desktop. And as you can see, the card is cooled by a single slot, copper fansink, that remained relatively quiet during our brief testing, but man did it get hot. The memory is connected to the GPU via a 256-bit memory bus, which offers roughly 63GB/s at default clock speeds. The Sapphire Radeon HD 4850 you see pictured here has a core GPU clock speed of 625MHz with 512MB of GDDR3 memory clocked at 993MHz. Some time later, factory overclocked versions of these cards are due to arrive, followed by the R700. As we've already mentioned, the initial line-up of Radeon HD 4800 series cards will be comprised of the Radeon HD 4850 and Radeon HD 4870.

How to flash ati radeon hd 4870 x2 for mac pro