Hulk
Diamond Member
- Oct 9, 1999
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No, Anandtech found that using SPEC - which contains a large variety of workloads - showed that on average there was a drop in IPC compared to Sunny Cove. They didn't just use a single workload for their analysis.
@ uzzi38,
Today is a good day. Thank you for setting me straight on this. I was under the assumption that for the most part the larger L2/L3 cache of Willow Cove would lead to better overall IPC performance vs. Sunny Cove. As you informed me I was dead wrong.
I went ahead and calculated every Anandtech bench from the Tiger Lake review for both Sunny and Willow. Since these were single core tests I used the maximum boost frequency and equalized results for clock speed. For the application benchmarks, which are multicore I used 3.0GHz for Willow and 2.6GHz for Sunny. Ian stated that after 20 seconds of running a multicore bench Ice Lake (Sunny) would thermal down to 2.6GHz. It took a couple of hours to account for variation in clocks and such but I have the numbers. I included the other processors for the single core results since we have a pretty good idea of clock speeds for them.
If anyone would like to see my Excel spreadsheet just PM me and I'll e-mail it to you.
Sunny Cove shows 5.08% better IPC in combined SPEC2006. Zen 3 is a beast.
Summary | SPECint2006 | SPECfp2006(C/C++) | SPEC int+fp | |
5050 | AMD Ryzen 9 5950x | 0.0% | 0.0% | 0.0% |
3900 | Intel i7-1065G7 | -20.9% | -10.1% | -17.3% |
4800 | Intel i7-1185G7 | -22.8% | -24.7% | -23.5% |
4700 | AMD Ryzen 9 3950x | -29.6% | -20.7% | -26.6% |
5300 | Intel i9-10900k | -24.4% | -32.4% | -27.0% |
4200 | AMD Ryzen 7 4800u | -62.1% | -67.1% | -63.8% |
For the application benchmark testing Sunny Cove is showing 0.7% better IPC than Willow Cove.
Now I understand for smaller applications that fit well in the Sunny Cove's smaller but faster L2 (like SPEC int) then Sunny has an advantage. But there are some apps that do require the large L2 even at the "expense" of longer latency.
Again, uzzi38 thanks for setting me straight on this! Took me a few hours to prove it to myself but hard work never hurt anyone (too much)!
Total IPC percentage difference for each group of tests was added and then divided by the number of benchmarks to arrive at these results and the ones above. So because there are more Science and Simulation benches than the other that category is weighted higher in Total result.
Summary | Office and Web Average | Science and Simulation Average | Rendering and Encoding Average | Total | |
2600 | Intel i7-1065G7 (15W) | 0.0% | 0.0% | 0.0% | 0.00% |
3000 | Intel i7-1185G7 (15W) | -4.6% | 4.3% | -1.0% | 0.66% |
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