ATI Radeon X850XT Platinum Edition AGP (R481)
ATI RX850XT PE Features
The video card specimen to be tested is a reference board by ATI and is shipped in a small box. Of course, the batch-produced solutions which our Canadian partners are submitting to us soon will do please by both the rich package bundle and other nice bonuses, and not all manufacturers will equip their boards with a dual-slot cooling system.
That was a special fun to see the inscription "Powered to play DOOM3" close to the logically expected "Preferred graphics for Half-Life2".
The cooling system installed on RX850 XT PE has undergone substantial changes as compared to the previous flagship solutions (it's the first time ATI uses a dual-slot design for the cooling system) and is completely identical to what we saw on R480. The graphic processor is cooled by a copper radiator. The fan takes air from the CPU housing, runs it through beneath the cover and blows it outside through holes in the cap. All that is fastened with two screws and a plate on the board's reverse side.
To prevent the small components from damage upon the contact of the screws with the textolyte, there are protective "washers" placed between them. To cool the four memory chips positioned on the reverse side of the board, a separate aluminum plate is used. Remember that in ATI's previous flagship - X800XT PE - no cooling for the memory chips positioned on the reverse side of the board was provided at all.
The card offers 256 Mb of GDDR3 memory with a 256-bit data transmission bus assembled of eight Samsung BGA memory chips of 1.6 ns access time, which is equivalent to 625 MHz (1250 MHz DDR) operating frequency. The standard operating frequency of the memory on ATI RX850XT PE is 590 MHz (1180 MHz DDR). The memory chips are positioned in four along each side of the PCB.
The graphic processor R481 runs at 540MHz, offers 16 pixel pipelines and 6 vertex units.
The manufacturer used the "jewel steel" for GPU as the thermal interface and thermal spacers for the video memory chips.
The card supports for VIVO features implemented on the ATI Rage Theater chip,
is equipped with a connector for additional power supply,
and with a standard set of outputs - analogous, digital, and VIVO.
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