Hi
@Zladimir, first I must apologize with 1AA, should be 603. Some dementia on my part, I'm
getting old. As for 61E I started looking at that a long time ago but discovered the CPU I wanted to use it on could be ratio unlocked so never continued with it but AFAICR it and some Southbridge register need setting and then a CF9 reset was required. I think it is meant to happen before RAM is setup but maybe I'm wrong. The 1.67 would be more for the RAM, CPU can be multiplier limited.
Here's some results with AVX2 and E5-2683v3 production CPU using no microcode, 0x27 and 0x3A. Green arrows are AVX2 ratio drops and red arrows are power throttling.
Power limiting has been increased to over 200W, the SKU itself is 120W nominal and up to 240W with a maximum of 40 seconds. Well you can see we tax that to the limit with power throttling down to 120W in all cases after the 40 second rolling average. VCore offset was -30mV and VCache offset -40mV.
The case of no microcode exhibits not only a drop in multiplier but an increase in vcore some 100mV higher than the normal highest multiplier vcore. Note that this board only physically measures voltage for Core 0, the other 13 cores are not accessible. With per core p-states one would need a seperate measuring point for each core. Power consumption and temperature is the greatest of all three but be aware that the CPU default Tjmax with no microcode for this chip is 95C while patches change this. In the case of patch 0x27 and 0x3A Tjmax is 90C. The DTS is the same though so this results in DTS measurements reading 5C lower than real. Personally I've always tried to use PECI since P55 days and just use DTS for differential checks.
Microcode 0x27 shows almost no drop in AVX2 load except for power limiting. Due to power limiting overall AVX2 throughput is similar to version 0x3A.
Microcode 0x3A drops a multi on AVX2 load but also drop VCore. Uses a small amount less power than 0x27.
This time power estimations have been purposely halved, otherwise testing is the same as above.