The X1800 Series

Introducing the X1000 Series Family

Unlike all previous GPU launches we have been a part of here at PC Perspective, the R520 launch is not merely a single or couple of video cards.  It is in fact an entire family of cards ranging from the high end enthusiast to the budget conscious gamer.  This is made possible by the fact that the R520 architecture has components that are de-coupled and thus allowing for a wide array of configuration options for each core.  Here we’ll touch on each series, the SKUs you can expect to see, their specific architectural specifications and expected pricing and availability.

The X1800 Series

The X1800 series of cards is the top of the line part from ATI.  This card is aimed at the gaming enthusiast and is ATI’s hat that is being thrown into the performance ring. 

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This diagram of the X1800 architecture shows what you would expect: the full gamut of pipes and processors that the R520 architecture can offer.  The X1800 series features:

  • 16 pixel pipes
  • 8 vertex pipes
  • 16 texture units
  • 16 ROPs
  • 16 Zcompare units
  • 512 max threads

The X1800 will come in two flavors, the XT and the XL. 

  • X1800 XT
  • 625 MHz core clock
  • 700 MHz memory clock
  • 10.0 Gpixels/sec peak pixel fillrate
  • 1,250 Mvertices/s peak throughput
  • 256-bit memory interface
  • 256 MB / 512 MB GDDR3
  • $499 / $549 expected price point

 

  • X1800 XL
  • 500 MHz core clock
  • 500 MHz memory clock
  • 8 .0Gpixels/sec peak pixel fillrate
  • 1,000 Mvertices/s peak throughput
  • 256-bit memory interface
  • 256 MB
  • $449 expected price point

ATI R520: Radeon X1800, X1600 and X1300 Review - Graphics Cards 198

The X1800 XT features a dual slot cooling solution and two dual-link DVI output connectors. 

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The XL card uses only a single slot cooling solution and still keeps the two dual-link DVI outputs. 

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The R520 core has over 300 million transistors, but because of the 90nm process it was made on, it is still smaller than the G70.

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Here you can see the ATI Rage Theater chip that gives the X1800 series cards some of its video power and the blank spot to the right of it is where I imagine the new CrossFire compositing engine will be placed when those cards are available.  All of the cards we reviewed had such a blank spot on their PCB somewhere, save for the X1300 Pro that will not use an external dongle.

The availability of these two cards are quite different however.  At the ATI tech day, we were told that while the X1800 XL would be available starting today, the XT wouldn’t be until 11/5, a full month later.  This is definitely a let down, and if yields are as good as ATI is telling us they are, then something is definitely amiss.  We’ll discuss these availabilities more in the conclusion to our review.

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