Back in February, the HD 6450, HD 6570 and HD 6670 were launched as OEM-only products. Now they're being released through retail channels for the first time, as of 19th April 2011.
The three new models span low end to the low mid-range
This is good news for builders of lower end machines, and HTPCs, for which these cards are ideally suited. The cards take over from the 5450, 5570 and 5670 respectively, and mark what is believed to be the last AMD Radeon HD 6xxx series release.
The HD 6450 is based on the Caicos core with 160 stream processors, 8 texture units and 4 ROPs and comes in 512MB GDDR3 (64-bit interface) or 1GB GDDR5 (128-bit interface) flavours. Each flavour will also run a different core clock, 625MHz or 750MHz respectively.
The HD 6570 uses the Turks Pro core @ 650MHz, with 480 stream processors, 24 texture units and 8 ROPs, using 512MB or 1GB GDDR3 (128-bit interface, 900MHz) memory configuration.
The HD 6670 utilises the Turks XT core, with almost identical specs to the HD 6570, but upping the clocks to 800 MHz core and using GDDR5 memory at 1000MHz.
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New information 15-4-11
Some performance data have emerged showing the new Radeon cards to outperform the current sector leader, the GeForce GT440.
One more thought for consideration - AMD are set to release a selection of APUs this year, which include inbuilt graphics (low end) as well as a traditional CPU. Is the lifespan of the cards in this article limited? Will AMD release low end HD 7xxx cards? This all remains to be seen.