Go Back > Great Internet Mersenne Prime Search > Hardware

Thread Tools
Old 2018-04-25, 09:50   #1
M344587487's Avatar
"Composite as Heck"
Oct 2017

7×113 Posts
Default Ryzen 2 efficiency improvements

Efficency data from here:
RAM data from here:

tl;dr when set to 3.5Ghz all-core, a 2700X uses 80% of the energy that a 1700 does at the same clock. If using a Ryzen 2 for LL or similar you'll want to manually set the clock to override XFR2, which is good for normal use but not efficiency. Memory support and cache latencies are much better this gen. The sweet spot looks to be either 3466 or 3200 with tighter timings, some boards reportedly do a good job of tightening automatically. Some people state a 3% IPC gain clock for clock, but they may have inadvertently benefitted from automated timing tightening. Out of the gate MSRP is good value at not much above what gen 1 is currently selling for. Overall Ryzen 2 potentially rivals an equivalent intel for our purposes, although maybe not for LL due to intel's better AVX2 implementation.
M344587487 is offline   Reply With Quote
Old 2018-04-25, 11:43   #2
mackerel's Avatar
Feb 2016

3×139 Posts

I've noticed the X models selling well, ones at regular pricing are gone, and only some at elevated pricing are still available. Non-X is still around. Could speculate either way if people do want the X, or if the supply for X might be more limited since it is essentially binned to the upper limit. The price difference isn't much between them, and for other uses I'd rather pay slightly more for the faster CPU than trying to manually overclock it.

I'm vaguely planning on getting a 2700X, once my desired mobo is available (Asus mini-ITX X470).

I suspect the execution cores haven't really changed, and any apparent improvement in IPC is due to the latency improvements, which I'm not sure will have much impact on FMA3 workloads.
mackerel is offline   Reply With Quote
Old 2018-04-25, 12:46   #3
Mark Rose
Mark Rose's Avatar
Jan 2013

3×977 Posts

Also, the latest bios improves performance at least on Linux:
Mark Rose is offline   Reply With Quote
Old 2018-04-25, 15:23   #4
M344587487's Avatar
"Composite as Heck"
Oct 2017

7·113 Posts

I think it comes down to the 2700X has a better cooler and is priced to compete, last gen the 1700 was competitive but the 1700X and 1800X were priced more as halo products at MSRP. The assumed better binning is another plus. I am also waiting on the M-ITX X470 from Asus, aside from connectivity it has what looks to be identical specs to the crosshair 7, which I hope means it's just a cut-down version with identical memory support (the crosshair 7 memory support is meant to be good).
M344587487 is offline   Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ryzen help Prime95 Hardware 9 2018-05-14 04:06
Help to choose components for a Ryzen rig robert44444uk Hardware 50 2018-04-07 20:41
29.2 benchmark help #2 (Ryzen only) Prime95 Software 10 2017-05-08 13:24
AMD Ryzen is risin' up. jasong Hardware 11 2017-03-02 19:56
Any code improvements? db597 Software 7 2004-09-09 17:05

All times are UTC. The time now is 05:45.

Fri Apr 23 05:45:03 UTC 2021 up 15 days, 25 mins, 0 users, load averages: 1.18, 1.37, 1.49

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.