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AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

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Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#181

Post by gens »

nottorp wrote: post #59

More importantly for some, it's a 95W AMD part vs a 140W Intel part. If the power delta stays the same even for mainstream parts, does this mean AMD will become a good quiet option too? By quiet I mean "I can't hear it at night" not "I can't hear it over the music". Edit: Also, I think data centers these days are limited in density by power delivery and cooling. Even a 25W delta adds up when you're talking about thou…

If your goal is quiet and quiet alone, i would suggest a good cooler. A cooler master hyper 212 is really quiet.

I thought data centers are going for ARM cpu's now, as shoveling data is not all that cpu intensive ?

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#184

Post by semi-extrinsic »

jabl wrote: post #150
semi-extrinsic wrote: post #125

Earlier quoted context omitted.

> Anybody doing anything with more than 16GB, especially data science (think all the R and Python people, all scientists) Not sure I agree. Most science datasets (both from simulations and experiments) are sufficiently noisy that if your scientific end results and conclusions change as a result of even thousands of bitflips in your 16 GB of data, you're Doing It Wrong and your article isn't worth the paper it's print…

Yes, there are some algorithms that are iterative in nature (e.g. iterate until some error threshold goes below some specified limit), that can be tolerant to random corruption. Many other algorithms aren't. And even if you use such a tolerant algorithm, you may still get a bit flip e.g. in the code, or in some data not touched by the iterative algorithm, etc. etc. There's a reason why HPC systems universally use ECC…

> There's a reason why HPC systems universally use ECC.

I was under the impression that HPC systems universally use ECC because at that scale, the probability of memory errors in the OS are large enough to cause constant instability of some of the nodes?

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#185

Post by CydeWeys »

jdietrich wrote: post #140
hocuspocus wrote: post #132

Earlier quoted context omitted.

That's huge :) In a smaller HTPC it can make sense to go passive but for an 8-core desktop workstation I'm not convinced it's worth the trouble. Your PSU and GPU will likely have fans, also with a PCIe SSD it's better to have some airflow.

It's now possible to build very high-performance rigs that run completely silently. Palit offer a fanless 1050ti; Asus Strix 1060/70/80 cards will run with the fans stopped under light loads. Fanless 500w PSUs are readily available, which will happily power an eight core machine with a GTX 1080. The brilliant Silverstone FT03 case uses a chimney-like vertical design that can create significant airflow through pure co…

The biggest reduction in computer noise I've noticed over the past ten years has been eliminating HDD chatter by switching to SSDs. I still have one older PC that I use occasionally that has an HDD, and it is pretty serious. You can feel when the filesystem is under load by the frantic vibrations of the arm moving across the disk.

Fans, in comparison, tend to be a steady thrum, and thus fade into the background in a way that HDD chatter doesn't.

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#186

Post by tilt_error »

krzyk wrote: post #7
std_throwaway wrote: post #2

What about ECC memory? Intels desktop processors fail hard on that feature.

Why do you need that in desktop env? What's the usecase when it can be beneficial to have expensive ECC RAM instead of the ordinary one? I was always thinking that ECC can prevent blue screens/kernel faults, but I haven't seen those in years on my laptop without ECC.

Some links that may give more background to the area:

Coding Horror To ECC or Not To ECC [1], What Every Programmer Should Know About Memory [2], Memory Errors in Modern Systems [3], and an analysis of memory errors in the entire fleet of servers at Facebook over the course of fourteen months [4].

[1] https://blog.codinghorror.com/to-ecc-or-not-to-ecc/ [2] https://people.freebsd.org/~lstewart/articles/cpumemory.pdf [3] https://www.cs.virginia.edu/~gurumurthi/papers/asplos15.pdf [4] https://users.ece.cmu.edu/~omutlu/pub/memory-errors-at-faceb...

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#187

Post by dman »

Nokinside wrote: post #178
tw04 wrote: post #176

Earlier quoted context omitted.

>Intel's response has always been the same. They cut their profit margins and start selling chips cheaper. They undercut AMD with volume and price and suddenly AMD is in the doghouse again struggling. AMD's best efforts can cut into Intel's profits, but Intel's response is to remove all profits from AMD until it's left behind. The last time Intel did that it was through illegal tactics - unlikely they'll get away wit…

Doing illegal is just optimization. Intel can undercut AMD lawfully if it wants. Instead of hidden rebates, Intel can openly cut prices.

That first line is amazingly brazen. If a movie is made about Intels monopolistic practices that fully belongs as a dialog spoken by the Intel CEO.

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#189

Post by semi-extrinsic »

ThenAsNow wrote: post #161
semi-extrinsic wrote: post #125

Earlier quoted context omitted.

> Anybody doing anything with more than 16GB, especially data science (think all the R and Python people, all scientists) Not sure I agree. Most science datasets (both from simulations and experiments) are sufficiently noisy that if your scientific end results and conclusions change as a result of even thousands of bitflips in your 16 GB of data, you're Doing It Wrong and your article isn't worth the paper it's print…

> Not sure I agree. Most science datasets (both from simulations and experiments) are sufficiently noisy that if your scientific end results and conclusions change as a result of even thousands of bitflips in your 16 GB of data, you're Doing It Wrong and your article isn't worth the paper it's printed on. (There are probably exceptions, as always, but those working in those few specific subfields should be aware of i…

I do CFD, so let's take that example, and say you have a bit flip in one value in one of your fields. There are four cases to consider:

a) bit flip happens so high in the mantissa it makes your code crash. detectable, you run simulation again

b) bit flip happens somewhat lower in the mantissa, enough that it shows up in your analysis. detectable as unphysical result, you run simulation again

c) bit flip happens even lower, you don't catch it as unphysical in your postprocessing and analysis. Here's where I'm saying: if a bit flip happens like this and affects your simulation in such a way that you don't see it's an error, but it still changes your end result and conclusion, and you're not running replications of your simulation to test robustness etc., you're Doing It Wrong.

d) bit flip happens even lower, same order of magnitude as numerical errors. nothing bad happens

Re: AMD Ryzen 7 1800X Benchmarked – Giving Intel’s $1000 Chips A Run For It

#190

Post by onli »

astrodust wrote: post #105
bdz wrote: post #100

Earlier quoted context omitted.

lol? Your CPU can absolutely bottleneck your GPU. And new games start to use hpyer threading more and more, see Battlefield 1 for example. There is a huge difference between i3/i5/i7 http://www.gamersnexus.net/game-bench/2673-battlefield-1-cpu...

Unless you have a 144p display then all of the high-end configs there will appear identical.

Do you mean 1440p or 144Hz? I'll assume 144Hz. First, that would be enough – gamers are flocking to those like crazy. Second, you have to really look at Multiplayer benchmarks here, not single player. In those Hyperthreading of the i7-7700K helps a lot when compared to the i5-7600K. If Ryzen can place a better model in between those two processor, that would be very nice.
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