Radeon HD 7000 Family Full Specifications: Rambus XDR2 Memory?

As we have already known, the AMD Radeon HD 7000 series graphics card codenamed "Southern Islands" will begin to introduce the next generation graphics and computing architecture "Graphics Core Next" (GCN). There are now rumors that the video memory of the high-end Radeon HD 7900 series will even drop GDDR5 and use the Rambus XDR2.

Recently, some netizens have posted a complete list of AMD Radeon HD 7000 series on the Internet. The details of the content are astounding. Among them, the number of calculation units, memory, and frequency, such as stream processors, of each model of the new family is listed. , power consumption, etc. all with parameters. According to tradition, the specific specifications of new products will generally be finalized as soon as they are released. Now it is so early to reveal such details, and credibility has to be greatly reduced. Therefore, everyone should have a look and do not have to be too true.

According to this form, the two high-end models code-named Tahiti XT/Pro Radeon HD 7970/7950 will be based on the new GCN architecture, with 32/30 Radeon clusters, with 2048/1920 stream processors and 128/120 texture units, respectively , 64 ROP barrier units, core frequency 1000/900MHz, memory address width 256-bit, and memory particles actually Rambus 2005 put forward high-speed XDR2, capacity is 2GB, equivalent frequency up to 8000/7200MHz, memory bandwidth It also soared to 256/230GB/s, power consumption is only 190/150W, much lower than the current Radeon HD 6900 series.

The top single card dual core New Zealand Radeon HD 7990 will naturally be the new GCN architecture and XDR2 new memory, but the specific specifications are unknown.

According to Rambus, the XDR2 is the fastest memory system in the world and can provide twice the bandwidth of GDDR5. The system's total bandwidth can exceed 500GB/s, and its power consumption is 30% lower than the same. If you can solve the technical licensing problems, XDR2 is indeed more excellent technically.

In addition, other series of Radeon HD 7000 family will follow the architecture of VLIW4, which forms a similar situation with Radeon HD 6000 family, with different architectures at both ends.

And there are two versions of the manufacturing process, both TSMC 28nm but different in nature, Radeon HD 7900 series is focused on high-performance HP version, Thames XT/Pro Radeon HD 7870/7850, Lombok XT/Pro Radeon HD 7670/ The 7570 is an HPL version that emphasizes low leakage rates. According to the plan, HPL is expected to mass production at the end of this year, HP will have to be next year, which means Radeon HD 7000 family will be low-end first, high-end follow-up, and the first role will be Radeon HD 7800 series.

Radeon HD 7870/7850 has 24/12 SM arrays, 1536/1408 stream processors, 96/88 texture units, 32 ROP units, core frequency of 950/850MHz, and 256-bit 2GB GDDR5 memory, equivalent The frequency increases to 5800/5200MHz, the bandwidth also reaches 186/166GB/s, the power consumption is only 120/90W respectively.

The Radeon HD 7670/7570 has 12 SM arrays, 768 stream processors, 48 ​​texture units, 16 ROP units, and 128-bit 1GB GDDR5 memory. The equivalent frequency is 5000/4000MHz and the bandwidth is 80/64GB/s. Thermal design power consumption 60/50W.

The Radeon HD 7670/7570 will certainly be able to build a hybrid crossfire system with the next generation APU Trinity that also integrates a VLIW4 graphics core, but it is not known if the Radeon HD 7800 series is also possible.