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To return to the RV730, there are actually 64 units of type calculation vec5 (64×5 = 320) as opposed to 32 processors therefore flow of scalar units or GeForce 9500 GT. While the arrangement of computing units in the RV730 chip has been revised to address RV770, the number of texture units is almost identical set at 32 since while the Radeon HD 4850 consists of 40. The number of ROP units, over the last treatment on the pixels, is divided by two facing the Radeon HD 4850 and set at 8 while the chip is always a unit tesselation. AMD also offers its UVD engine of second generation hardware decoding of high definition video streams.Engraved in 55nm by TSMC, the chip RV730 has 514 million transistors and uses, not surprisingly, the PCI-Express second generation. Clocked at 750 MHz, the RV730 is accompanied by a memory controller, interfaced 128 bits, and whose particularity is to work with the GDDR3 but also the DDR3. It is for AMD to make its chip compatible with traditional memory chips, chips produced in larger quantities and therefore less expensive, at least on paper. The Radeon HD 4670 employs therefore the choice of GDDR3 or DDR3 memory but according to the model, the operating frequency is different: 1 GHz for GDDR3 and 900 MHz for DDR3. Furthermore the amount of memory should vary as GDDR3 models will be equipped with 512 MB when their counterparts in DDR3 will be supported by 1 GB of video memory.

Clearly intended for entry level, the Radeon HD 4550 is based on responding to a chip code-named RV710. Echoing the architecture of the RV730 and supports DirectX 10.1, the chip has a much lower number of units calculation set at 80 stream processors is, in fact, 16 units type vectorial vec5. Clocked at 600 MHz, the chip embeds a memory controller interface 64-bit and using DDR3 memory. By default, AMD recommends a frequency of 800 MHz for the memory bandwidth is a theoretical average of 12.8 Gb / s, is not much it must be said.