AMD Carrizo Part 2: A Generational Deep Dive into the Athlon X4 845 at $70
by Ian Cutress on July 14, 2016 9:00 AM ESTLinux Performance at 3 GHz
Built around several freely available benchmarks for Linux, Linux-Bench is a project spearheaded by Patrick at ServeTheHome to streamline about a dozen of these tests in a single neat package run via a set of three commands using an Ubuntu 11.04 LiveCD. These tests include fluid dynamics used by NASA, ray-tracing, OpenSSL, molecular modeling, and a scalable data structure server for web deployments. We run Linux-Bench and have chosen to report a select few of the tests that rely on CPU and DRAM speed.
All of our benchmark results can also be found in our benchmark engine, Bench.
C-Ray: link
C-Ray is a simple ray-tracing program that focuses almost exclusively on processor performance rather than DRAM access. The test in Linux-Bench renders a heavy complex scene offering a large scalable scenario.
C-ray, while slowly fading in importance as a benchmark, shows a slight gain here for Kaveri despite the lack of DRAM accesses this benchmark uses. There may however still be some L2 use.
NAMD, Scalable Molecular Dynamics: link
Developed by the Theoretical and Computational Biophysics Group at the University of Illinois at Urbana-Champaign, NAMD is a set of parallel molecular dynamics codes for extreme parallelization up to and beyond 200,000 cores. The reference paper detailing NAMD has over 4000 citations, and our testing runs a small simulation where the calculation steps per unit time is the output vector.
NAMD shows a small benefit for Kaveri here, with all three processors showing a +16% gain minimum over Trinity.
NPB, Fluid Dynamics: link
Aside from LINPACK, there are many other ways to benchmark supercomputers in terms of how effective they are for various types of mathematical processes. The NAS Parallel Benchmarks (NPB) are a set of small programs originally designed for NASA to test their supercomputers in terms of fluid dynamics simulations, useful for airflow reactions and design.
Redis: link
Many of the online applications rely on key-value caches and data structure servers to operate. Redis is an open-source, scalable web technology with a strong developer base, but also relies heavily on memory bandwidth as well as CPU performance.
The 2MB of L2 cache, compared to the 4MB of the other parts, hurts Carrizo here.
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Lolimaster - Monday, July 18, 2016 - link
If they don't put the full 4MB l2 for Bristol Ridge desktop, don't even bother to release it.Im actually thinking that they decided to axe BR for desktops and will be focused on Zen FX, survive with FM2+ a bit more for value and then unveil Raven Ridge Zen APU at CES.
Visual - Tuesday, July 19, 2016 - link
The "Pages in this review" links are messed up and lead to one page after what they say.In addition, your "remember me" checkbox for login when posting comments remembers nothing.
prodikl - Tuesday, July 19, 2016 - link
Could you guys please add a few more data points in your comparisons, e.g. against an i3, an i7, a celeron, tegra x1 etc. instead of just immediate-neighbor comps? I have no at-a-glance idea of how this stacks up against other CPUs in the grand scheme of things.LoneWolf15 - Tuesday, July 19, 2016 - link
If I can't get a lower-power desktop variant with the integrated GPU, Carizzo does nothing for me. I'd be happy to swap a Braswell N3700 board that Intel is falling down on with the iGPU drivers (overscan/scalling settings are broken, it's been a year with no fix), but that's what I need to get one of these;; I don't need a desktop unit without a GPU, and I don't need a notebook. I need a media center, and Carizzo would be ideal for it.eek2121 - Tuesday, July 19, 2016 - link
Nice review on the 1060! Oh wait...jfelano - Thursday, July 21, 2016 - link
Not a gamer, so who cares. AMD continues to smoke Intel at performance per dollar.Xanavi - Thursday, July 21, 2016 - link
Please get rid of Outbrainachamate - Monday, August 22, 2016 - link
I have no need for Intel CPU, ever, to do everything including heavy applications and games. Maybe benchmarks numbers are not AMD favor, but 99% of users wont see any difference. Save money still on AMD side and I hope stays like that. I do have a laptop with i5, by accident, a very cheap used one but I still use AMD for heavy editing or gaming. If I get a recent generation i7 for free I will sell it, for sure. Again, is probably 99% people out there wont see any difference. Spend your money on video, memory, ssd and hot dogs, thats all. Thanks.h3r3t1k - Wednesday, October 5, 2016 - link
I'm looking to pair my RX 460 which is PCIe x8 with either the X4 845 or 880K. Should I go for the 845 with this card?wiboonsin - Sunday, November 26, 2017 - link
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