AMD Ryzen 1800X vs. Intel Core i7-7700K hash cracking benchmarks

600% faster is absolutely unbelievable. According to Agner's observations, this should not be true at all: http://www.agner.org/optimize/microarchitecture.pdf.

The Ryzen architecture apparently has half throughput for 256-bit vectors instructions compared to 128-bit vector instructions, while Skylake (no data for Kaby Lake yet) has full throughput for 256-bit vectors. Since the 1800X has twice the cores, it should be about the same throughput if all cores are used, so if it isn't multi-threaded, worst case should be half, no?

This guy also seems a bit biased »it has to throttle itself down below the base clock to prevent itself from imploding -- just like their GPUs!«.

There is also a benefit to using 256-bit instructions, contrary to what he says: They're more dense than having 2 separate 128-bit instructions.

I wouldn't call it a bold-faced lie either, it's not like they said »Using 256-bit vector instructions is much faster than using 128-bit vector instructions!«.

I sold one of my extra 6700k and had $320 hold burning in my wallet and almost bought a 7700k but got a ryzen 1700 instead to try it out. The MSI mobo was terrible, but i get nearly double the crytonight hashrate of my 4.6GHz 6700k with the 1700 @ 3.9GHz which was pretty easy to do. Temps are around 60C with stock wraith cooler and only takes about 110watts full system hashing. I'd say ryzen is a nice win. Skylake X and Coffee Lake though look like a pretty nice improvement from left field. AMD might have some problems fighting those.

So is there any reason to use a CPU for actual hash cracking instead of a GPU?

You'd probably use a CPU to hash user passwords at login and signup, but outside of that is there any reason to?

Regardless AMD's push back into high end processors is beneficial to everyone. Notice how fast Intel dropped prices and released new processors, like the core i9. At least it will finally end the whole overpriced tick/tock Intel release "roadmap". Intel has been sitting on this stuff all along and just strings everyone out because what else are you going to buy?

> And speaking of AVX2, this test was important because it confirms that Ryzen's AVX2 support is a bold-faced lie. Yeah the instructions are there, but they don't have any 256-bit registers, so you gain nothing by using AVX2.

Is this true? That's pretty damning.

How did this unsubstantiated and offensive message board link make it to the front page of HN?

i really wanted to buy a ryzen, but it seams it is unstable under a heavy workload https://forums.gentoo.org/viewtopic-t-1061546-postdays-0-pos... i will probably have to wait for intel -X chips or buy a e3 v6 xeon :/

its been proven that Nvidia graphics card drivers are behind with AMD CPUs. Wether this is purposeful or just that the drivers are not as fleshed out hasn't been proven. For a more complete test they should have added

Ryzen + dual 580

i7-7700k + dual 580