Inspecting the Cards
Below we have some pictures of ATI's Radeon HD 2600 XT, 2600 Pro, and 2400 XT cards.
First, let's talk about the Radeon HD 2600 XT and Pro. The GPU at the heart of the Radeon HD 2600 family of cards is derived from the R600 used on the 2900 XT and has essentially the same feature set.
The Radeon HD 2600, however, has only 120 stream processing units, 8 texture units and 4 ROPs. Radeon HD 2600 cards are outfitted with a 128-bit memory interface and they'll be equipped with 256MB GDDR3 or GDDR4 memory. The card pictured above is the GDDR4 model. Memory clock speeds with range from 500MHz to 1.1GHz and GPU clocks will be between 600MHz and 800MHz depending on the model. And as you can see, all of the cards are adorned with single-slot coolers.
Another noteworthy aspect to the Radeon HD 2600 series of GPUs is that they are manufactured on TSMC's 65nm process node. The GPU itself is comprised of roughly 390 million transistors and cards will consume approximately 45 watts of power, hence the lack of supplemental power connectors on the boards pictured here. You can see the actual GPU die in the final picture above; it's tiny by today's standard. Also notice that the 2600 XT has the native CrossFire edge connectors first introduced with the Radeon X1950 Pro, but the 2600 Pro does not.
The Radeon HD 2400 family of cards is also comes in XT and Pro flavors. The card you see here is the higher end XT model. The Radeon HD 2400 GPU is made up of approximately 180 million transistors and it too is manufactured on TSMC's 65nm node. And if you thought the 2600 GPU looked fairly small, get a load of the 2400 - it's a fraction the size of dime. The GPU features 40 stream processing units with 4 texture units and 4 render back-ends, and depending on the model it will be clocked between 525MHz and 700MHz.
All Radeon HD 2400 series cards also have single-slot coolers, and some will be passively cooled. Products in the Radeon HD 2400 family feature a 64-bit memory interface and will be configured with between 128MB to 256MB of GDDR3 or DDR2 RAM clocked between 400MHz and 800MHz, but through the use of ATI's HyperMemory feature frame buffer sizes of up t0 512MB will be available. Power consumption will be in the 25w range.
Both the Radeon HD 2400 and HD 2600 cards can output audio via HDMI using the same special adaptor we talked about in the AVIVO HD section of our R600 launch coverage. 2400 series cards, however, will be equipped with only a single dual-link DVI output in conjunction with standard VGA and HD video outputs. The HD 2600 will have a similar dual, dual-link DVI plus HD video output configuration to the Radeon HD 2900 XT.