Folding Forum

Only Project 16810 so far, but it nets about 50% higher PPD than most a7 projects (130k vs ~85k, Ryzen 2700X). Nice.

Is the forum subject going to change now that a8 is apparently on Prime Time?

I've seen some good ones already, between 488k and 507k ppd on the 3950x 27 threads.
Project: 16810 (Run 31, Clone 698, Gen 9) was the best so far, 21.7k points!
Most of the units on 3 cpu's are stil A7, about 20% A8.

The age of your CPU will affect what kind of folding Core_a8 attempts

Prior to 2011 your CPU does SSE2, so will only have minor speed ups.

Prior to 2013 you CPU does AVX_256, so will also only do minor speed ups, as Core_a7 used these SIMD engines.

Newer CPUs may use AVX2_256 and get the big speed ups. A feature of AVX2_256 is an instruction called FMA (Fused Multiply and Add) This makes Adds 'free', they can be done at the same time as Multiplies. So the speed up approaches 60%

06:14:24:WU00:FS00:0xa8: SIMD: avx_256

I have two CPUs doing SSE2, 8 doing AVX_256, and one doing AVX2_256, as I tend to run old PCs.

https://en.wikipedia.org/wiki/Streaming ... r_versions

Crawdaddy79 wrote:...Is the forum subject going to change now that a8 is apparently on Prime Time?

Eventually it will change, assuming that there won't be any unexpected issue with the change

Jimbo,

Does the project also decide if SSE2/AVX_256/AVX2_256? I have a brand new i9, but the work units are only using AVX_256 (not AVX2_256). Is there some flag I need to set?

Never mind. I was looking at a7 cores. When I look at a8 cores, I am using AVX2_256.

My mistake.

mwroggenbuck wrote:When I look at a8 cores, I am using AVX2_256.:

Yes, AVX2_256 is new in Core_a8. It is nice that F@H is always trying to be faster. This seems to have been a very smooth Beta!

If your CPU does AXX2 and FMA, it should be automatic. I am unaware of any OS requirements over AVX.

JimboPalmer wrote:...I am unaware of any OS requirements over AVX.

64-bit OS for Linux while 32-bit and 64-bit for Windows. Having said that, I am not sure for how long we will continue to support 32-bit Windows since AMD/Nvidia no longer support 32-bit Windows.

There is no more 32 bits FahCore ... So 64 bits OS is mandatory.