RADEON X800 XT Platinum Edition
The RADEON X800 XT Platinum Edition graphics processor is ATI’s flagship product currently. It is manufactured by 0.13-micron tech process with low-k dielectrics and consists of about 160 million of transistors. The graphics processor works with GDDR3 SDRAM that differs for the better from DDR and DDR2 by having lower power consumption and heat dissipation, among other things. The RADEON X800 XT Platinum Edition is represented by a graphics card from HIS. Its full name is HIS Excalibur X800 XT IceQ II:
This product is made in full compliance with ATI’s reference design, but the cooling system is different. There’s an intricate contraption on the face side of the card that consists of: 1) a copper foundation that takes heat from the GPU die and the memory chips, 2) aluminum ribs attached to the base and 3) a plastic casing that directs air along the heatsink’s ribs and exhausts it to the outside. For the system to work normally, it is necessary that the neighboring PCI slot be unoccupied.
The memory chips on the backside of the card also have a passive aluminum heatsink on:
The nominal frequencies of the GPU and memory on this card were 525/1150MHz. The card didn’t boast an exceptional overclockability notwithstanding its advanced cooling system: the maximum stable frequencies were 550/1250MHz.
The following table contains detailed information:
Well, ATI’s claims that the RADEON X800 XT Platinum Edition consumes no more than 70W are fully confirmed. Curiously enough, the biggest portion of the consumption falls on the additional power connector, while the AGP slot only supplies about 10W in the Burn mode.
When overclocking, I increased the GPU frequency by 4.7%, and the memory frequency by 8.7%. The power consumption grew up slightly: by 4.6% in the Idle mode and by 4.2% in the Burn mode. Even overclocked, the card never reached a power consumption of 70W.