Originally Posted by Seronx
^CPU Benchmark, Kabini 1.5 GHz vs Snapdragon 800 2.3 GHz.
Also, to note the benchmark Bay Trail beat Snapdragon 800 was a system benchmark not a CPU benchmark.
The physics benchmark in question relies on the GPU (source). That's not completely reflective the CPU picture. Additionally, it's likely that AMD and Nvidia have given much more support than Qualcomm to the optimization of the code for their specific platforms. That said, Anandtech did write an article that showed Jaguar to have more floating point operations per cycle of throughput for FMAC, but similar if NEON is used (the caveat is NEON is not IEEE 754 compliant, so any code forcing compliance via compiler options will have FAR slower performance -- probably 8x or more slower). While float performance is interesting and important, integer performance is more important for the typical consumer application (why coremark and dhrystone are considered so important).
That said, if we consider the above to be representative of CPU performance (which it isn't) and we know that Jaguar has a 12% throughput advantage over silvermont and a clockspeed of 1.5GHz instead of 1.1GHz, but only beats S4 800 by 13%, then the article I linked to must have inaccuracies somewhere (my point -- though the article strongly inferred the benchmark was reflective of real CPU power). Considering that A4-5000 is a 15w chip, the benchmark becomes a little different.
To quote from an article about an interview with a qualcomm employee
Qualcomm feels that 45 degrees Celsius (113 degrees Fahrenheit) would be the maximum allowed temperature for SoCs such as the Snapdragon 600 or 800. Furthermore we learned that 2.5 to 3W would be the upper limit for Thermal dissipation of the whole SoC in a mobile phone, while the max thermal power of a tablet could go up to 5W.
The 2.5 to 3W envelope for phones and 5W for tablets is the inherent limitation of passively cooled mobile devices. Anything more than that would have to include an active cooling system, something that is next to impossible to implement in a mobile phone.
Snapdragon 600, the current flagship SoC from Qualcomm, has a 1.9GHz limitation while the soon to launch Snapdragon 800 has 2.3GHz limit, all in order to stay below the designed thermal power of 2.5W to 3 W for phones and 5W for tablets. Snapdragon 600 chips are already in some key devices such as the HTC One, Samsung Galaxy S4 as well as LG’s Optimus G Pro, while The Snapdragon 800 is expected in a month or two if not earlier and has a few fixed OEM designs.
We can assume that the tablet-bound Snapdragon 800 has a 5W TDP which is 3x lower than the A4-5000 TDP (15W) which raises further questions about the Silvermont benchmarks (since the 1GHz processor is phone-bound).
Originally Posted by sherlock
While this one might have with more words, I get all I need to know from the Anandtech article already. While it is good to have as many source of information as possible, I didn't find the experience of reading this one as enjoyable as I did reading the Anandtech one.
If that's all you care to know, that's a good enough answer.