SPEC CPU - Multi-Threaded Performance

Moving onto multi-threaded SPEC CPU 2017 results, these are the same workloads as on the single-threaded test (we purposefully avoid Speed variants of the workloads in ST tests). The key to performance here is not only microarchitecture or core count, but the overall power efficiency of the system and the levels of performance we can fit into the thermal envelope of the device we’re testing.

It’s to be noted that among the four chips I put into the graph, the i9-11980HK is the only one at a 45W TDP, while the AMD competition lands in at 35W, and the i7-1185G7 comes at a lower 28W. The test takes several hours of runtime (6 hours for this TGL-H SKU) and is under constant full load, so lower duration boost mechanisms don’t come into play here.

SPECint2017 Rate-N Estimated Scores

Generally as expected, the 8-core TGL-H chip leaves the 4-core TGL-U sibling in the dust, in many cases showcasing well over double the performance. The i9-11980HK also fares extremely well against the AMD competition in workloads which are more DRAM or cache heavy, however falls behind in other workloads which are more core-local and execution throughput bound. Generally that’d be a fair even battle argument between the designs, if it weren’t for the fact that the AMD systems are running at 23% lower TDPs.

SPECfp2017 Rate-N Estimated Scores

In the floating-point multi-threaded suite, we again see a similar competitive scenario where the TGL-H system battles against the best Cezanne and Renoir chips.

What’s rather odd here in the results is 503.bwaves_r and 549.fotonik_r which perform far below the numbers which we were able to measure on the TGL-U system. I think what’s happening here is that we’re hitting DRAM memory-level parallelism limits, with the smaller TGL-U system and its 8x16b LPDDR4 channel memory configuration allowing for more parallel transactions as the 2x64b DDR4 channels on the TGL-H system.

SPEC2017 Rate-N Estimated Total

In terms of the overall performance, the 45W 11980HK actually ends up losing to AMD’s Ryzen 5980HS even with 10W more TDP headroom, at least in the integer suite.

We also had initially run the suite in 65W mode, the results here aren’t very good at all, especially when comparing it to the 45W results. For +40-44% TDP, the i9-11980HK in Intel’s reference laptop only performs +9.4% better. It’s likely here that this is due to the aforementioned heavy thermal throttling the system has to fall to, with long periods of time at 35W state, which pulls down the performance well below the expected figures. I have to be explicit here that these 65W results are not representative of the full real 65W performance capabilities of the 11980HK – just that of this particular thermal solution within this Intel reference design.

SPEC CPU - Single-Threaded Performance CPU Tests: Office and Science
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  • heickelrrx - Monday, May 17, 2021 - link

    back when rocket lake design were finalized the 10nm hasn't matured like today

    10nm has delayed a lot, they simply tired waiting
    Reply
  • sandeep_r_89 - Tuesday, May 18, 2021 - link

    Ooh yes, I'd like an NUC with Tigerlake-H Reply
  • mode_13h - Tuesday, May 18, 2021 - link

    It should be NUC11 Extreme, if they do it. The Extreme-series are NUCs in name only. Reply
  • Matthias B V - Monday, May 17, 2021 - link

    Indeed it is a big and crucial step as it is the first new arch and node on H45+ all predecessors where Skylake and 14nm iterations.

    However a make or break will be AlderLake as bigLITTLE either is a game changer or an issue. Golden cove will be good but it really depends on the sheduling and Gracemont.

    Especially on possible benefits on mobile run time and consumption!
    Reply
  • SarahKerrigan - Monday, May 17, 2021 - link

    Looks moderately competitive if you ignore power. Better than nothing, I guess. Reply
  • RanFodar - Monday, May 17, 2021 - link

    It's very competitive (except efficiency), not moderate. They're now trading blows here. Reply
  • Krysto - Monday, May 17, 2021 - link

    So no reason to get one when you can get an AMD alternative that has similar performance for half the power draw. Reply
  • RanFodar - Monday, May 17, 2021 - link

    It has platform advantages (i.e. PCIE 4, Thunderbolt) and if anticipated, great gaming performance. As a consumer, it is much better to have a choice with competitive processors. And there will be reasons to buy a Tiger Lake system when it comes up for review. Reply
  • mode_13h - Monday, May 17, 2021 - link

    Does PCIe 4 really provide any measurable benefits, in a laptop ??? Reply
  • xpclient - Monday, May 17, 2021 - link

    Yes I think so. Have you seen PCIe Gen 3 SSDs reach these speeds? https://pbs.twimg.com/media/E1QXL2qVgAAZfnL.png Reply

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