Radeon HD 5900 Codenamed
Hemlock, the Radeon HD 5900 series was announced on October 12, 2009, starting with the HD 5970. The Radeon HD 5900 series utilizes two
Cypress graphics processors and a third-party PCI-E bridge. Similar to Radeon HD 4800 X2 series graphics cards; however, AMD has abandoned the use of X2 moniker for dual-GPU variants starting with Radeon HD 5900 series, making it the only series within the
Evergreen GPU family to have two GPUs on one PCB.
Radeon HD 5800 Codenamed
Cypress, the Radeon HD 5800 series was announced on September 23, 2009. Products included Radeon HD 5850 and Radeon HD 5870. The launching model of Radeon HD 5870 can support three display outputs at most, and one of these has to support
DisplayPort. In terms of overall performance, the 5870 comes in between the GTX 470 and GTX 480 from rival company Nvidia, being closer to the GTX 480 than the GTX 470. An Eyefinity 6 edition of Radeon HD 5870 was released, with 2 GiB GDDR5 memory, supporting six simultaneous displays, all to be connected to one of the
mini DisplayPort outputs and all supporting this connection natively to not require additional hardware. The Radeon HD 5870 has 1600 usable shader processors, while the Radeon HD 5850 has 1,440 usable stream cores, as 160 out of the 1,600 total cores are disabled during
product binning which detects potentially defective areas of the chip. A Radeon HD 5830 was released on February 25, 2010. The Radeon HD 5830 has 1,120 usable stream cores and a standard core clock of 800 MHz.
Radeon HD 5700 The codename for the 5700 GPU was
Juniper and it was exactly half of
Cypress. Half the shader engines, half the memory controllers, half the ROPs, half the TMUs, half everything. The 5750 had one shader engine disabled (of 10), so had 720 stream processors, while the 5770 had all ten enabled. Additionally, the 5750 ran at 700 MHz and a lower voltage, while the 5770 used more power, but ran at 850 MHz. Both cards were normally found with 1 GB of GDDR5 memory, but 512 MB variants did exist, performance suffering somewhat.
Radeon HD 5600 Codenamed
Redwood XT, the 5600 series has all five of Redwood's shader engines enabled. As each of them has 80 VLIW-5 units, this gave it 400 stream processors. Reference clocks were 775 MHz for all 5600s, while memory clocks varied between OEMs, as did the use of DDR3 and GDDR5 memory, the latter being twice as fast.
Radeon HD 5500 The Radeon HD 5570 was released on February 9, 2010, using the Redwood XT GPU as seen in the 5600 series. At first release was limited to DDR3 memory, but later, ATI added support for GDDR5 memory. One more variant, with only 320 stream cores, is available and Radeon HD 5550 was suggested as the product name. 5570s and 5550s were available with GDDR5, GDDR3 and DDR2 memory. The 5550 variant disabled one shader engine, so had only 320 stream processors (4 engines, 80 VLIW-5 units each). All reference board designs of the Radeon HD 5500 series are half-height, making them suitable for a low profile form factor chassis.
Radeon HD 5400 Codenamed
Cedar, the Radeon HD 5400 series was announced on February 4, 2010, starting with the HD 5450. The Radeon HD 5450 has 80 stream cores, a core clock of 650 MHz, and 800 MHz DDR2 or DDR3 memory. The 5400 series is designed to assume a low-profile card size. ==Mobile products==