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


View All Comments

  • Bbdffd - Tuesday, May 18, 2021 - link

    I think AMD still not able to defeat intel in Gaming even with their 7nm processor (5980hs). Reply
  • Cooe - Thursday, May 20, 2021 - link

    "The performance lead against AMD’s strongest mobile CPU, the 5980HS"

    The 35W R9 5980HS is NOT AMD's strongest mobile CPU Brett. That would be the 45W unlocked & higher clocked R9 5980HX. I expect better from AnandTech... -_-
  • Spunjji - Thursday, May 20, 2021 - link

    It is a little bit complicated... the 5900HX appears to beat the 5980HS by a little way in multi-thread tests but fall behind in single-thread, and if you look at things in performance-per-watt terms the 5980HS is easily the strongest. There's also the fact that there don't seem to be any shipping devices with the 5980HX in them. Strange times. Reply
  • ottonis - Friday, May 21, 2021 - link

    So well, according to Intel's advertising materials, their new 11th gen Tiger Lake based 8c mobile CPUs were supposed to wipe the floor with AMD.

    Well... not really, according to this review, at least not within the same power consumption envelope and in multicore tasks.
  • block2 - Monday, May 24, 2021 - link

    Running Intel at 35w if possible would be interesting.

    Unclear on quick read if external GPUs were disabled so that these tests aren't in reality a GPU test.
  • JayNor - Friday, May 28, 2021 - link

    news out today in tomshardware that there is a B series of the 8 core TGL that boosts to 5.3GHz. This is even for parts with the GPU ... Reply
  • mode_13h - Saturday, May 29, 2021 - link

    About right, for a desktop CPU. Reply
  • Makste - Monday, May 31, 2021 - link

    This is a NUC part, not a laptop part. Reply
  • mode_13h - Tuesday, June 1, 2021 - link

    Not really. NUCs normally use the U-series notebook CPUs. That's all a NUC is -- a notebook CPU in a compact enclosure.

    NUC Extreme is something completely different. They're more like a normal desktop PC, and the latest NUC Extreme that Intel just announced is the one that will use these H-series CPUs.

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