03-07-2017, 12:28 AM
Yeah, it's a bit strange.
On Anandtech:
"On the FP side there are four pipes (compared to three in previous designs) which support combined 128-bit FMAC instructions. These can be combined for one 256-bit AVX, but beyond that it has to be scheduled over multiple instructions."
Later in the same article it says:
"We have two MUL and two ADD in the FP unit, capable of joining to form two 128-bit FMACs, but not one 256-bit AVX. In order to do AVX, the unit will split the operations accordingly. On the counter side each core will have 2 AES units for cryptography as well as decode support for SSE, AVX1/2, SHA and legacy mmx/x87 compliant code."
(http://www.anandtech.com/show/11170/the-amd-zen-and-ryzen-7-review-a-deep-dive-on-1800x-1700x-and-1700/8)
So it can do AVX2, but the questions remain, is it a hassle and how big is the throughput. My impression of Ryzen it has a better performance in applications than games, compared to Intel. In Blender and Win-RAR it looks fine, in POV-Ray, WinZIP and CineBench 15 SMT it outpaces Intel by a nice gap. It rules AES encoding. But then Hashcat is its own beast and hopefully someone here is getting such a CPU in the recent future, so we know if it's worth a thought.
On Anandtech:
"On the FP side there are four pipes (compared to three in previous designs) which support combined 128-bit FMAC instructions. These can be combined for one 256-bit AVX, but beyond that it has to be scheduled over multiple instructions."
Later in the same article it says:
"We have two MUL and two ADD in the FP unit, capable of joining to form two 128-bit FMACs, but not one 256-bit AVX. In order to do AVX, the unit will split the operations accordingly. On the counter side each core will have 2 AES units for cryptography as well as decode support for SSE, AVX1/2, SHA and legacy mmx/x87 compliant code."
(http://www.anandtech.com/show/11170/the-amd-zen-and-ryzen-7-review-a-deep-dive-on-1800x-1700x-and-1700/8)
So it can do AVX2, but the questions remain, is it a hassle and how big is the throughput. My impression of Ryzen it has a better performance in applications than games, compared to Intel. In Blender and Win-RAR it looks fine, in POV-Ray, WinZIP and CineBench 15 SMT it outpaces Intel by a nice gap. It rules AES encoding. But then Hashcat is its own beast and hopefully someone here is getting such a CPU in the recent future, so we know if it's worth a thought.