The Intel Skylake-X Review: Core i9 7900X, i7 7820X and i7 7800X Tested
by Ian Cutress on June 19, 2017 9:01 AM ESTBenchmarking Performance: CPU Legacy Tests
Our legacy tests represent benchmarks that were once at the height of their time. Some of these are industry standard synthetics, and we have data going back over 10 years. All of the data here has been rerun on Windows 10, and we plan to go back several generations of components to see how performance has evolved.
Benchmarking Performance: CPU Office Tests
Comparing Skylake-S and Skylake-X/SP Performance Clock-for-Clock
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FreckledTrout - Monday, June 19, 2017 - link
Missing the 7820x on the power draw graph.Ian Cutress - Tuesday, June 20, 2017 - link
The 7820X power numbers didn't look right when we tested it. I'm now on the road for two weeks, so we'll update the numbers when I get back.chrysrobyn - Monday, June 19, 2017 - link
In my head I'm still doing the math on every benchmark and dividing by watts and seeing Zen looking very different.Old_Fogie_Late_Bloomer - Monday, June 19, 2017 - link
I'm sure I'm wrong about this, but it makes more sense to me that the i9-7900X would be a (significantly) cut down HCC die instead of a perfect LCC. i9 vs i7, 44 vs 28 lanes, two AVX units instead of one?And yet the one source I've found so far says it's the smaller die. It's definitely the LCC die, then?
Ian Cutress - Tuesday, June 20, 2017 - link
HCC isn't ready, basically. LCC is. Plus, having a 10C LCC die and not posting a top SKU would be wasteful of the smallest die of the set.Also, delidding a 10C SKU.
Old_Fogie_Late_Bloomer - Tuesday, June 20, 2017 - link
Well, it wouldn't be a waste if Intel's yields weren't good enough to get fully functional dies. The fact that Intel is not just releasing fully functional LCC chips but announced that they would be the first ones available suggests that they have no trouble reliably producing them, which is pretty impressive (though they have had plenty of practice on this process by now).Thanks for the response; I thoroughly enjoyed the review and look forward to further coverage. Exciting times!
Despoiler - Monday, June 19, 2017 - link
Considering Ryzen is in the desktop category and these Intel chips are HEDT, we need to wait to see what Threadripper brings. AMD won't have the clock advantage, but for multithreaded workloads I suspect they will have more cores at a cheaper price than Intel.FreckledTrout - Monday, June 19, 2017 - link
I wouldn't say AMD wont have a clock advantage once you get to the 14 and 16 core chips. They might not but you saw the power numbers and thermals, Intel very well may have to pull back the frequency as they scale up the cores more than AMD will.FMinus - Thursday, June 22, 2017 - link
Actually I think it's the other way around. AMD might have clock advantage on higher core models thanks to not going with the monolithic approach. Easier to to cool those beasts but power is still an issue.If you imagine four 1800x on one interposer, you can see them reaching 4GHz on all of those dies, that said the power consumption would be massive, but easier cooler as the intel 16 core variant.
Lolimaster - Tuesday, June 20, 2017 - link
The 1995X will have a stock 3.6Ghz for the 16cores, same as the 7900X with just 10.