AMD Ryzen 5 3600XT / Ryzen 7 3800XT / Ryzen 9 3900XT Linux Performance In 130+ Benchmarks

[yeeeeman]

Why would you waste your time reviewing these? They are basically the same thing as last year products with 50-100$ bigger price.

[starshipeleven]

Aren't they the same all the way up and down the stack? A Ryzen 3 3100 is just a failed EPYC 7742 chiplet, isn't it?

Yes, they use the same CPU core chiplets for the whole stack, the only differing stuff is in the "IO chiplet" aka "chipsetlet", that is built as a bigger process node and has two separate versions, one for consumer CPUs and the other for Epyc and Threadripper.
The image is a Epyc, and the smaller dies are the CPU chiplets, the big one in the middle is the IO chiplet.



And this is a consumer Ryzen with two CPU chiplets on the top and the IO chiplet on the bottom



The amount of shenanigans they can pull with a chiplet-based design is completely off the charts, it's much more convenient for binning and such as everything is using the same production line.

[starshipeleven]

Let the fools pay £78 more for no cooler for the 3900xt when you can get pretty much identical performance from the 3900x which has a fine stock cooler

It's a overclocker CPU:
-it's not going to be run at stock frequency
-stock cooler is crap for OC

[Slartifartblast]

And this is bad because? This is the enthusiast level, where people pay 100$ more just because it has RGB leds.

Also who uses the stock cooler on a CPU that costs 400+ euro anyway. None complained when they didn't include a cooler for threadripper.

Let the fools pay £78 more for no cooler for the 3900xt when you can get pretty much identical performance from the 3900x which has a fine stock cooler. As they say, fools and their money are easily parted, it's just not worth an 18% price premium for a set of Emperor's new clothes.

[morydris]

This is a brilliant article, I especially love the "per-watt" and "per-dollar" views.

Only one gripe: PLEASE drop CoreMark. It's completely unrealistic code and you'll find all academics railing on it as it strongly favors simple naive cores, cores that won't do well on real workloads.

[Teggs]

chiplets yo.

The chiplet with worse silicon goes in a Ryzen 5 or 3 or whatever. That's the one of the main benefits of not making a single die.

Aren't they the same all the way up and down the stack? A Ryzen 3 3100 is just a failed EPYC 7742 chiplet, isn't it?

Apart from that, I'm surprised that the scaling was so consistent. Either AMD sent Michael three golden samples, or the advertised increase in performance is actually there in every application for XT vs X parts.

[starshipeleven]

they already make those from chips which couldn't make say 3800x. so now your suggestion is they take 10% best 3800x chips and make 3800xt, and from 90% worst make ryzen 3(ryzen 5 is still two chiplets)? doesn't look like good busisness.

My suggstion is that they bin the chiplets and assign them to a product line depending on quality AND production quota. The chiplets can go from the higher end CPUs to the lower end ones.

At the end of the day, it hurts your bottom line to flood the market with high end parts so there is a fixed quota of that, once that is fulfilled, everything is moved to midrange or low end.

[caligula]

"Over the entire span of benchmarks, the Ryzen 9 3900XT saw a peak power draw of 144 Watts with an average of just 75 Watts compared to the Core i9 10900K having an average power draw of 133 Watts and a peak of 379 Watts."

nice amd

Just wow Reminds me of the Pentium 4 days. Intel hasn't had this shitty silicon for a long time. Why would anyone buy this piece of sh*t hardware even if it was 2% faster in some CPU intensive single thread games? After all, buying Intel basically means that you don't want any progress in CPU design ever again. Handing over your money to Intel means, please don't develop any new process nodes in the next 10 years and yes, please invent gaping new on-chip security holes that require mitigations with double digit % perf impact.

[pal666]

The chiplet with worse silicon goes in a Ryzen 5 or 3 or whatever. That's the one of the main benefits of not making a single die.

they already make those from chips which couldn't make say 3800x. so now your suggestion is they take 10% best 3800x chips and make 3800xt, and from 90% worst make ryzen 3(ryzen 5 is still two chiplets)? doesn't look like good busisness.
my solution is simpler: they just improved process performance so that it can do 100 mhz higher with same or better yield than before

[mczak]

3950x is best of the best silicon, in order to fit 16 cores in a 105w tdp

That may be true, but it would only contribute a tiny bit to it being a perf/w leader. The truth is all these cpus are operating so far above their ideal (as far as efficiency goes) operating points it's not even funny. With 16 cores the 3950X, having the lowest "tdp per core" among the tested cpus, is just forced to get a bit closer to that point, increasing efficiency quite dramatically.