AMD Instinct MI300A data center APU underperforms against mainstream CPUs in Geekbench — MI300A submissions show lower performance than a Core i5-14600K

Instinct MI300A
Instinct MI300A (Image credit: AMD)

AMD's bleeding-edge Instinct MI300A data center APU has been tested in Geekbench 6.3.0. Discovered by BenchLeaks on X, the pair of MI33A APUs performed seemingly worse than a Core i5-14600K across three runs.

The APU showed up as "AMD Proto Sample: SH5-MI300A-A0," somewhat implying that it could be a prototype sample. According to the submissions, the MI300A was tested on a platform called "AMD Corporation Eviden2p," consisting of a dual-socket design. Therefore, the system had 48 cores and 96 threads, as each MI300A wields 24 Zen 4 execution cores. The MI300A operated at 3.7 GHz, the rated CPU peak clock speed for the data center APU.

The MI300A scored 1,798 points in the single-core benchmark and 13,888 points in the multi-core test for the first run. The second run saw scores of 1,938 and 14,694 points. The third run saw scores of 1,992 and 15,085 points, respectively.

Those familiar with Geekbench 6 scores will immediately know how horrible all three benchmark runs are for a chip on the scope and scale of the MI300A. By comparison, Intel's mid-range Core i5-14600K desktop CPU outperforms the MI300A in the same test. The 14600K features a single-core score of 2,806 points and a multi-core score of 15,977 points in Geekbench 6, surpassing the MI300A by a whopping 47% in single-core and 9% in multi-core.

Swipe to scroll horizontally
CPUs:Single CoreMulti Core
MI300A — First Run1,79813,888
MI300A — Second Run1,93814,694
MI300A — Third Run1,99215,085
Core i5-14600K2,80615,977
Ryzen Threadripper 7960X3,050 (average)25,000 (average)

Also armed with 24 Zen 4 cores, the Ryzen Threadripper 7960X was seemingly faster than the MI300A. In Geekbench 6, the Ryzen Threadripper 7960X is well ahead of the MI300A, featuring an average single-threaded score of 3,050 points and an average multi-core score in the 25,000-point range based on test results in the Geekbench browser. The result was to be expected in a way since the Ryzen Threadripper 7960X has a faster base (4.2 GHz) and boost clock (5.3 GHz) than the MI300A.

Given the abysmal results, it's clear that the MI300A wasn't performing to its full potential. We wouldn't be surprised if the chip is not supported correctly on Geekbench 6 or if the cooling could have limited the MI300A. Remember that the MI300A has a peak TDP of 760W.

The MI300A is AMD's flagship APU for the data center; the chip's primary competition is Nvidia's Grace Hopper Superchip, which is currently one of the fastest data center chips in the world. Geekbench 6 targets desktops, laptops, and smartphones. Benchmarking a data center chip with Geekbench 6 is pointless since specialized workloads exist. Nonetheless, sometimes, it's amusing to see how exotic CPUs perform on ordinary benchmarks.

Aaron Klotz
Contributing Writer

Aaron Klotz is a contributing writer for Tom’s Hardware, covering news related to computer hardware such as CPUs, and graphics cards.

  • jeremyj_83
    I don't know how many times this has to be said but posting Geekbench results for data center hardware is utterly useless.
    Reply
  • NinoPino
    What's the sense of this article ?
    Maybe it is a prototype.
    Maybe not well cooled.
    Unknown motherboard type.
    Maybe software have incompatibility.
    Variability of results indicate serious issues in the benchmarking.
    Geekbench is hardly the aimed workflow of these chips, so the value of geekbench results is questionable, also if results are very good.
    Reply
  • jeremyj_83
    NinoPino said:
    What's the sense of this article ?
    Maybe it is a prototype.
    Maybe not well cooled.
    Unknown motherboard type.
    Maybe software have incompatibility.
    Variability of results indicate serious issues in the benchmarking.
    Geekbench is hardly the aimed workflow of these chips, so the value of geekbench results is questionable, also if results are very good.
    About the only use for Geekbench in a data center chip is to test that it completes the benchmark if it is an early silicon.
    Reply
  • purposelycryptic
    A prototype of a new-generation data center APU didn't perform up to par in its first run of a standard CPU benchmark? I'm sorry, but that really doesn't tell us much about how the final product will perform in its intended role.

    The integrated AI-GPU, NPU, or whatever AMD's brand of AI-accelerators is called, provides a significant part of the value of these chips, hence them being an entirely separate processor line from their server CPUs.

    Sidenote: the industry really need to decide on a standardized, non-copyrighted generic name for these things - Intel calls them NPUs, my home server runs a couple of discrete Google Coral TPUs, I'm guessing Qualcomm probably has their own name for them... It's a mess. The only thing everyone seems to agree on is to advertise their performance using OPS (TOPS, POPS, etc), the same kind of seemingly but not really useful measure for comparison as FLOPS continue to be for GPUs.

    Anyway, these things are trying to balance multi core processing power with power consumption, *and* have an additional powerful integrated secondary AI processor onboard, so, comparing benchmarks with consumer CPUs, or workstation CPUs like the Threadrippers that are designed around maximizing all-around single-processor performance with minimal consideration to power consumption, is kind of an 'apples to bananas to cumquats' comparison, even if this were a production chip.

    These numbers obviously don't look good, but the benchmarking tool they are coming from also hasn't been updated for these processors, nor accounts for them being special-purpose APUs. So they are numbers resulting from running an uncalibrated tool on a prototype of a specialized processor.

    We know AMD can make killer processors, the article even compared it to one. I feel like it's more than a little early to call them out on this one based on this information alone.

    But, then again, I'm hardly objective when it comes to AMD - I invested fairly heavily in them (as well as less but still significantly in Nvidia and Intel... and pretty much the entire industry chain down from ASML up to Supermicro) earlier this year, when everything was all sunshine and lollipops for AMD/Nvidia, and it looked like Intel had gone as low as it was going to, and headed for better days. Needless to say, things have looked more than a little rough in the semiconductor industry this latter half of the year, and, with around 10% of my portfolio directly invested there, not counting double-dips through ETFs, it would make me very happy to see AMD's fancy new toy do well. Make of that what you will.
    Reply
  • Makaveli
    In other news a rear wheel drive cars performance worse than all wheel drive on a track with lots of turns.
    Reply
  • rdgordon
    Do you see any Xeons at the top of the geekbench scores? And there's no Epycs, or any of the highest priced latest gen processors there. I think you're really onto something here mate!! Totally cracked open the case... or ya know, you can have someone a bit more familiar with enterprise hardware explain why a processor with 24 full cores, and a base speed in the 3.x range, and obviously not using all, or even half the cores, may perform 30ish percent worse, than an unlocked, enthusiast processor (certainly with the RAM and HDD also being maximized, since who cares if you have to reboot a system used for having fun), that can easily reach 5.8ghz on all 8 performance cores...

    As youre filing your next huge break in this case, don't forget to mention how both of those processors are thoroughly trounced in performance per dollar measurements, by the i3-10100. And it's not even close. How embarrassing. Why is anyone even buying new hardware, amirite?!?!!?
    Reply
  • Gururu
    The fact is that the performance is horrific. However, it is clear as day to me that the caveats for such preliminary testing are adequately listed. Something to keep an eye on, since there will be a LOT of data coming from chipmakers this month.
    Reply
  • EasyListening
    Gururu said:
    The fact is that the performance is horrific. However, it is clear as day to me that the caveats for such preliminary testing are adequately listed. Something to keep an eye on, since there will be a LOT of data coming from chipmakers this month.
    No the performance is where it should be for an early engineering sample. You should read others' posts before doubling down on your own ignorance.
    Reply
  • bit_user
    Gururu said:
    The fact is that the performance is horrific.
    GB6 is so weird, though. It would be informative to spend some time browsing their results database. Like, how on earth is the top multi-core Windows score held by an i7-13700K?https://browser.geekbench.com/v6/cpu/multicore
    I've also dug through some wildly different multicore scores on the same Xeon W model and concluded that the MT benchmark must be heavily dependent on memory bandwidth & latency. What I think happened, in that case, is that some of those Xeon W workstations had only half of their memory channels populated, because the lower results were about half of the better scores for that same CPU (and this CPU didn't support multi-socket configurations).

    Also, note how the results for the same CPU differ significantly, between operating systems.

    Before I'm willing to take Geekbench scores seriously, I'd need to see at least two things:
    A results browser that shows histograms of data for each CPU + platform combination, so you can easily see what the typical values are, by looking for the peaks. This enables outliers (due to overclocking, hacks, etc.) to be easily disregarded.
    Some data showing how well GB6 scores correlate to real-world performance metrics. Please, Geekbench, show me how your black box benchmark is at all relevant to anyone, for anything!
    EasyListening said:
    ...
    I can't believe I'm telling someone with your username to chill out, but here we are!
    ; )
    Reply
  • Gururu
    EasyListening said:
    No the performance is where it should be for an early engineering sample. You should read others' posts before doubling down on your own ignorance.
    I really doubt the performance is where it should or will be, it is horrific.
    Reply