Section by Andrei Frumusanu

SPEC: Renoir vs Picasso vs Ice Lake

Kicking off our look at performance, let's start with SPEC and analyzing how AMD managed to increase the performance against Picasso with its first-generation Zen cores. The newer generation Renoir with Zen2 cores should in theory see more significant performance upgrades thanks to the improved IPC of the new microarchitecture – but today’s 4700U also is just a mid-tier part with a lower 15W TDP as well as “just” featuring DDR4-3200 – not the fullest memory configuration possible as the SoC also support LPDDR4X up to 4266 MHz.

For our SPEC harness, We’re testing under WSL1 in Windows due to simplicity of compilation and compatibility, and are compiling the suite under LLVM compilers. The choice of LLVM is related to being able to have similar code generation across architectures and platforms. Our compiler versions and settings are as follows:

clang version 8.0.0-svn350067-1~exp1+0~20181226174230.701~1.gbp6019f2 (trunk)
clang version 7.0.1 (ssh://

-Ofast -fomit-frame-pointer
-mfma -mavx -mavx2

Our compiler flags are straightforward, with basic –Ofast and relevant ISA switches to allow for AVX2 instructions.

Single-Threaded Performance

SPECint2017 Rate-1 Estimated Scores

In SPECint2017, the new Zen2 based Ryzen 7 4700U is performing well, although the score increase compared to the last-generation 3780U aren’t as big for some workloads. As a reminder, the 3780U clocks up to 4.0GHz in terms of boost clocks while the 4700U clocks up to 4.1GHz. SMT being disabled on the 4700U should also give it a slight advantage in IPC over other Zen2 platforms given that it doesn’t have to statically share some core resources anymore in this mode.

Renoir showcases the biggest increases in workloads such as 548.exchange2_r and 525.x264_r which are back-end execution bound workloads, and the microarchitectural improvements here help a lot.

On the other hand, the weakest improvements are seen in workloads such as 520.omnetpp_r – this test is mostly memory latency bound and unfortunately the new chip here barely just matches its predecessor. The same can be said about 505.mcf_r where the improvements are quite meager.

The generational improvements here aren’t enough to catch up to Intel’s Sunny Cove cores in the Ice Lake i7-1065G7. Although that core might be running at higher single-core TDPs and power consumption, it still makes for a big gap in some of the more instruction pressure and cache pressure high workloads such as 500.perlbench_r and 502.gcc_r where the Intel chip still has a considerable lead in.

SPECfp2017 Rate-1 Estimated Scores

In SPECfp2017, these are floating point heavier test workloads. The generational increases here are also relatively smaller, with even an odd regression in 527.cam4_r. The Intel chip still has a lead across the board, and with particular large gaps in the more memory heavy workloads such as 519.lbm_r and 549.fotonik3d_r.

SPEC2017 Rate-1 Estimated Total

Overall, in terms of single-threaded performance, the Zen2 Renoir chip might seem a bit underwhelming, but when looking at the IPC improvement it’s actually not that far off from what’s expected of the new microarchitecture. In both SPECint and SPECfp we see a 12% performance per clock improvement, which is generally in line with Zen2’s generational improvements. As a reminder, the mobile chips here only feature a quarter the CCX L3 cache compared to its desktop counterparts, and that will result in smaller IPC gains, especially in memory heavy workloads.

AMD’s higher-end SKUs such as the 4900HS score slightly better due to the higher boost frequencies, but nothing significant enough to change the single-threaded competitive landscape; Intel still has a substantial advantage here thanks to a much stronger memory subsystem.

Multi-Threaded Performance

The multi-threaded performance comparison today is actually quite interesting just for the fact that the 4700U doesn’t feature SMT. Whilst it lacks multi-threading on the cores, it makes up for it by simply having 8 physical cores on the chip, double that of Picasso-based SoCs as well as Intel’s latest Ice Lake CPUs. Again, performance here will be strongly impacted by the TDP as well as cooling of the systems. Both AMD parts are 15W TDP designs, while the Intel chip sustains 25W.

SPECint2017 Rate-N (8 Instances) Estimated Scores

The resulting multi-threaded performance is quite varied across the benchmarks. What immediately stands out is that in purer execution heavy workloads the new Renoir chip pretty much demolishes its predecessor as well as the competition. This makes sense given that Zen2 has good execution resources and Renoir has double the physical core count to scale up performance.

Renoir’s performance here is very good across most workloads, but there’s a few workloads where Intel’s Ice Lake CPU comes closes or beats it even (502.gcc_r) – again these are the workloads that are most memory intensive.

SPECfp2017 Rate-N (8 Instances) Estimated Scores

SPECfp across 8 instances again shows similar results. Renoir fares extremely well across execution bound workloads, but this time around loses a lot more often against the Ice Lake chip in memory-bound workloads even though it has a 2x core count advantage.

The chip’s performance in memory-bandwidth heavy 519.lbm_r is particularly odd as it manages to fare worse than single-core results of a desktop Zen2 based system, and again far behind the Ice Lake counterparts.

SPEC2017 Rate-N (8 Instances) Estimated Total

Overall, AMD’s 4700U’s multi-threaded performance is fantastic in areas where it should matter most in a laptop-based system. The 2x core count advantage more than makes up for the lack of SMT, and workloads such as rendering and other creative tasks are the platform’s strong-points. In more memory-heavy workloads, performance doesn’t scale all that well as clearly the new chip still has a big weakness in its memory subsystem – scientific workloads or code compiling won’t scale nearly as well.

We have to wonder how Renoir will fare on an LPDDR4X configured system – unfortunately we haven’t been able to test such a platform yet. Overall, the 4700U seems like an excellent chip given its 15W TDP, but let’s see how it performs in our system benchmark suite…

Design System Performance


View All Comments

  • watzupken - Wednesday, May 6, 2020 - link

    If you are looking for better monitor and longer battery life, I think you will need to move up to the Swift 5 series. I observed that Acer have been using very dim monitors (250 nits or lower) on their Swift 3 series for a number of years now and I doubt they will give you a better option to maintain the product segmentation. Reply
  • Peskarik - Wednesday, May 6, 2020 - link

    thanks, watzupken Reply
  • x86koala - Wednesday, May 6, 2020 - link

    Hi anandtech,

    I found phones like Hisense A5c, A5pro cc and Hisense tablet Q5 very unique for their E-ink / RLCD screen, could you please do a review when they are available on the market? Thanks!
  • deil - Wednesday, May 6, 2020 - link

    I really hope 8GB is upgradable. Ram is cheap and right now I am painfully constrained on 12 GB, and I have dedicated gpu.

    for work my 32GB box is also sometimes to small, and that 8 core should be able to lift, even games.
  • Steve1992 - Wednesday, May 6, 2020 - link

    Far Cry 5 runs pretty cool:
    Maybe an issue with your test sample?
  • Valantar - Wednesday, May 6, 2020 - link

    I'm a bit disappointed in the GPU testing suite here. A combination of synthetics and AAA titles of various ages seems an odd fit for an iGPU - where are the lighter titles, esports titles, etc? _A lot_ of people would want to know how a notebook like this handles LoL, Rocket League, CS:GO, etc.

    Still, interesting how DDR4-3200 Renoir Vega 7 beats (or sometimes matches) LPDDR4X-3733 Ice Lake G7 - at 15W vs 25W no less, if the comparison is the Dell XPS 13. Makes me very interested in seeing an in-depth review of a 25W-configured 4700U or 4800U with LPDDR4X-4266.

    Also good to get confirmation that a 25W cTDP-up laptop is what you want for gaming - those bouncy frequencies would make for poor frametime consistency.
  • Oxford Guy - Thursday, May 7, 2020 - link

    How about 8 watts.

    "The laptop really struggled with its thermals, dropping the framerate into single digits often. The device attempted to run at around 18 Watts of power draw, slightly over the 15 Watt TDP, but in fact only averaged around 8 Watts during this run."
  • Valantar - Thursday, May 7, 2020 - link

    I saw that, but an average due to crazy throttling spikes can't be seen as representative (nor can the FPS in that case be used; that's why you have 1% and .1% minimums.). Hopefully there will be a firmware/BIOS update to improve this. Reply
  • alufan - Wednesday, May 6, 2020 - link

    the 4900HS is 35w not 45 Reply
  • qwertymac93 - Wednesday, May 6, 2020 - link

    Turd screen, turd battery, turd cooling.
    This things a turd. Price is irrelevant. You can buy second hand for half the price with similar compromises if that's what you want.

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