Benchmarking Performance: CPU System Tests

Our first set of tests is our general system tests. These set of tests are meant to emulate more about what people usually do on a system, like opening large files or processing small stacks of data. This is a bit different to our office testing, which uses more industry standard benchmarks, and a few of the benchmarks here are relatively new and different.

PDF Opening

First up is a self-penned test using a monstrous PDF we once received in advance of attending an event. While the PDF was only a single page, it had so many high-quality layers embedded it was taking north of 15 seconds to open and to gain control on the mid-range notebook I was using at the time. This put it as a great candidate for our 'let's open an obnoxious PDF' test. Here we use Adobe Reader DC, and disable all the update functionality within. The benchmark sets the screen to 1080p, opens the PDF to in fit-to-screen mode, and measures the time from sending the command to open the PDF until it is fully displayed and the user can take control of the software again. The test is repeated ten times, and the average time taken. Results are in milliseconds.

System: PDF Opening with Adobe Reader DC

The extra frequency of the new processors is helping when it comes to opening our monster PDF, but also the extra L2 cache is likely having an effect as well.

FCAT Processing

One of the more interesting workloads that has crossed our desks in recent quarters is FCAT - the tool we use to measure stuttering in gaming due to dropped or runt frames. The FCAT process requires enabling a color-based overlay onto a game, recording the gameplay, and then parsing the video file through the analysis software. The software is mostly single-threaded, however because the video is basically in a raw format, the file size is large and requires moving a lot of data around. For our test, we take a 90-second clip of the Rise of the Tomb Raider benchmark running on a GTX 980 Ti at 1440p, which comes in around 21 GB, and measure the time it takes to process through the visual analysis tool.

System: FCAT Processing ROTR 1440p GTX1080 Data

FCAT takes in a frame, processes it and dumps it, all on a single thread. The quicker you get through the workload the better, and frequency is supreme, hence we get the 7820X followed by the 7800X then the 7900X. Even though the 7900X has the higher turbo here, the results are with the margin expected.

3D Particle Movement v2.1

This is the latest version of the self-penned 3DPM benchmark. The goal of 3DPM is to simulate semi-optimized scientific algorithms taken directly from my doctorate thesis. Version 2.1 improves over 2.0 by passing the main particle structs by reference rather than by value, and decreasing the amount of double->float->double recasts the compiler was adding in. It affords a ~25% speed-up over v2.0, which means new data.

System: 3D Particle Movement v2.1

Give 3DPMv2.1 some cores, and it will show you the world / some numbers. The 1800X and 6950X were gunning for top spot, but the extra frequency of the 7900X wins here.

DigiCortex 1.20

Despite being a couple of years old, the DigiCortex software is a pet project for the visualization of neuron and synapse activity in the brain. The software comes with a variety of benchmark modes, and we take the small benchmark which runs a 32k neuron/1.8B synapse simulation. The results on the output are given as a fraction of whether the system can simulate in real-time, so anything above a value of one is suitable for real-time work. The benchmark offers a 'no firing synapse' mode, which in essence detects DRAM and bus speed, however we take the firing mode which adds CPU work with every firing.

System: DigiCortex 1.20 (32k Neuron, 1.8B Synapse)

DigiCortex loves a bit of memory, although when speaking with the developer, there can some instances where the beast needs to be fed. Losing the inclusive L3 might be a factor here, especially with the 7800X all the way down.

Agisoft Photoscan 1.0

Photoscan stays in our benchmark suite from the previous version, however now we are running on Windows 10 so features such as Speed Shift on the latest processors come into play. The concept of Photoscan is translating many 2D images into a 3D model - so the more detailed the images, and the more you have, the better the model. The algorithm has four stages, some single threaded and some multi-threaded, along with some cache/memory dependency in there as well. For some of the more variable threaded workload, features such as Speed Shift and XFR will be able to take advantage of CPU stalls or downtime, giving sizeable speedups on newer microarchitectures.

System: Agisoft Photoscan 1.0 Total Time

Photoscan is a mixed bag of operations, going through single thread sections to multithread and a range of cache/memory bandwidth requirepements. There's not much difference between thw 10 core and the 8 core, but the frequency helps against Broadwell-E.

Benchmarking Suite 2017 Benchmarking Performance: CPU Rendering Tests
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  • jjj - Monday, June 19, 2017 - link

    The 10 cores die is clearly 320+mm2 not 308mm2. The 308mm figure rounds down the mm based on those GamerNexus pics. From there, you slightly underestimate the size of other 2 die. Reply
  • Sarah Terra - Monday, June 19, 2017 - link

    Fair point but what I take from this review is that you are going to be spending pretty much double the cost or higher of ryzen for a proc that will have a 30% larger power envelope if you want higher performance. Intel is scrambling here, well done AMD. Reply
  • jjj - Monday, June 19, 2017 - link

    With 8 cores and up, thermal is a big issue when you OC Skylake X.. Power also to some extent.
    The 6 cores looks interesting vs the 7700k but not so much vs anything else. CPU+mobo gets you north of 600$ and that's a lot. If it had all the PCIe lanes enabled, there would be that but ,while plenty will buy it, it makes no sense to. And ofc there should be a Coffee Lake 6 cores soon , we'll see how it is priced- in consumer 6 cores with 2 mem chans is fine.
    More than 6 cores are priced way too high and , if you need many cores, you buy for MT not ST so ST clocks are less relevant.

    Intel moving in the same direction as AMD on the cache size front is interesting- larger L2 and smaller L3. Now they have "huge cache and memory latency issues"" just like Ryzen lol.
    W/e, Intel's pricing is still far too high and this platform remains of minimal relevance.
    Reply
  • ddriver - Monday, June 19, 2017 - link

    Funny thou, when Ryzen under-performed in games that was no reason to not publish gaming benches, in fact being the platform's main weakness there was actually emphasis put on that... but when it comes to intel we gotta have special treatment... Let's hear it for objectivity!

    Granted the 7800X finally brings something of relatively decent value, but still no good reason to justify the purchase unless one insists on an intel product, for the brand, for thunderbolt or hypetane support.

    "To play it safe, invest in the Core i9-7900X today."

    Really? With Threadripper incoming in a matter of weeks? For less than 1000$ you will get 16 zen cores. It will definitely beat the 7900X by a decent margin in terms of performance, plus the massive I/O capabilities and also ECC support, which I'd say is vital. That just doesn't sound like a honest recommendation. Not surprising in the least.
    Reply
  • ddriver - Monday, June 19, 2017 - link

    Also, on top of that we have launch prices for Ryzen rather than current prices. Looks like a rather open attempt to diminish AMD's platform value. Reply
  • Ian Cutress - Tuesday, June 20, 2017 - link

    We've always posted manufacturer MSRPs in our CPU charts. There has been no official price drop from AMD; if you're seeing lower, it's being run from the distributor level.

    On the TR issue, we basically haven't tested it and don't know the price. Lots of variables in the air, which is why the words are /if you want to play it safe/. Safe being the key word there.
    Reply
  • ddriver - Tuesday, June 20, 2017 - link

    Dunno Ian, in my book this sounds more like hasty than safe. The safe thing would be to wait out. Even without the incipient TR launch, early adoption is rather unsafe on its own. As it is, it sounds more like an attempt to dupe people into spending their money on intel in the eve of the launch of a superior value and performance product from a direct (and sole) competitor.

    It is true that nothing is still officially known about TR, but based on the ryzen marketing strategy and performance we can make safe and accurate speculations. I expect to see the top TR chip launched at 999$ offering at the very least 30% of performance advantage over the 7900X in a similar or slightly higher thermal budget, of course in workloads that can scale nicely up with the core count.

    Comparing the 7900X to the 1800X, we have ~35% performance advantage for 205% the price and 150% the power usage. Based on that, it is a safe bet that TR is going to shine.
    Reply
  • fanofanand - Monday, June 26, 2017 - link

    Ian is a scientist, the less guessing the better. Give him an opportunity to review TR before giving suggestions. Doesn't that seem fair? Reply
  • t.s - Tuesday, June 20, 2017 - link

    Play it safe? Really?? Please. As if everyone in this world's stupid. Reply
  • Ranger1065 - Wednesday, June 21, 2017 - link

    There has never been a better time to give Intel the middle finger. Reply

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