Bristol Ridge Takes on Mobile: E2 Through FX
It is no secret that AMD has faced an uphill battle since the release of the original Core 2 processors from Intel. While stayed mostly competitive through the Phenom II years, they hit some major performance issues when moving to the Bulldozer architecture. While on paper the idea of Chip Multi-Threading sounded fantastic, AMD was never able to get the per thread performance up to expectations. While their CPUs performed well in heavily multi-threaded applications, they just were never seen in as positive of a light as the competing Intel products.
The other part of the performance equation that has hammered AMD is the lack of a new process node that would allow it to more adequately compete with Intel. When AMD was at 32 nm PD-SOI, Intel had introduced its 22nm TriGate/FinFET. AMD then transitioned to a 28nm HKMG planar process that was more size optimized than 32nm, but did not drastically improve upon power and transistor switching performance.
So AMD had a double whammy on their hands with an underperforming architecture and limitted to no access to advanced process nodes that would actually improve their power and speed situation. They could not force their foundry partners to spend billions on a crash course in FinFET technology to bring that to market faster, so they had to iterate and innovate on their designs.
Bristol Ridge is the fruit of that particular labor. It is also the end point to the architecture that was introduced with Bulldozer way back in 2011.
Clockspeed Jump and More!
On March 1st AMD announced the availability of two new processors as well as more information on the A10 7860 APU.
The two new units are the A10-7890K and the Athlon X4 880K. These are both Kaveri based parts, but of course the Athlon has the GPU portion disabled. Product refreshes for the past several years have followed a far different schedule than the days of yore. Remember back in time when the Phenom II series and the competing Core 2 series would have clockspeed updates that were expected yearly, if not every half year with a slightly faster top end performer to garner top dollar from consumers?
Things have changed, for better or worse. We have so far seen two clockspeed bumps for the Kaveri /Godavari based APU. Kaveri was first introduced over two years ago with the A10-7850K and the lower end derivatives. The 7850K has a clockspeed that ranges from 3.7 GHz to the max 4 GHz with boost. The GPU portion is clocked at 720 MHz. This is a 95 watt TDP part that is one of the introductory units from GLOBALFOUNDRIES 28 nm HKMG process.
Today the new top end A10-7890K is clocked at 4.1 GHz to 4.3 GHz max. The GPU receives a significant boost in performance with a clockspeed of 866 MHz. The combination of CPU and GPU clockspeed increases push the total performance of the part exceeding 1 TFLOPs. It features the same dual module/quad core Godavari design as well as the 8 GCN Units. The interesting part here is that the APU does not exceed the 95 watt TDP that it shares with the older and slower 7850K. It is also a boost in performance from last year’s refresh of the A10-7870K which is clocked 200 MHz slower on the CPU portion but retains the 866 MHz speed of the GPU. This APU is fully unlocked so a user can easily overclock both the CPU and GPU cores.
The Athlon X4 880K is still based on the Godavari family rather than the Carizzo update that the X4 845 uses. This part is clocked from 4.0 to 4.2 GHz. It again retains the 95 watt TDP rating of the previous Athlon X4 CPUs. Previously the X4 860K was the highest clocked unit at 3.7 GHz to 4.0, but the 880K raises that to 4 to 4.2 GHz. A 300 MHz gain in base clock is pretty significant as well as stretching that ceiling to 4.2 GHz. The Godavari modules retain their full amount of L2 cache so the 880K has 4 MB available to it. These parts are very popular with budget enthusiasts and gaming builds as they are extremely inexpensive and perform at an acceptable level with free overclocking thrown in.