- Joined
- Jul 13, 2016
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- 3,274 (1.07/day)
Processor | Ryzen 7800X3D |
---|---|
Motherboard | ASRock X670E Taichi |
Cooling | Noctua NH-D15 Chromax |
Memory | 32GB DDR5 6000 CL30 |
Video Card(s) | MSI RTX 4090 Trio |
Storage | Too much |
Display(s) | Acer Predator XB3 27" 240 Hz |
Case | Thermaltake Core X9 |
Audio Device(s) | Topping DX5, DCA Aeon II |
Power Supply | Seasonic Prime Titanium 850w |
Mouse | G305 |
Keyboard | Wooting HE60 |
VR HMD | Valve Index |
Software | Win 10 |
1) who runs their PC 24/7 load? Unless you donate time to a project like Folding@home?
This is kind of a strawman argument. You don't need to run your PC under load 24/7 to see the savings. Even with half that time it's still over $100 in savings excluding any environmental cooling costs.
The power difference between the 7950X3D and 13900K in mixed workloads is nearly 100w as well so even in mixed workload scenarios the 7950X3D is going to consume vastly less power.
That said I'd challenge the notion that most people buying a 7950X3D aren't putting all those cores to use. If they aren't they are wasting their money. It still takes me 1 1/2 days to run a high quality AV1 encode on a 7950X.
There are certainly other professions that will be putting these CPUs to work around the clock whether that be encoding, rendering, ect.
2) You can set eco mode to 65W on regular chips and they will have the same energy savings without any additional tweaking needed.
65w will tank performance on a 13900K. The 7950X also looses performance at 65W as well. Mind you nothing is stopping you from enabling eco mode or tweaking these X3D chip's either. ECO and PBO power settings are available on all Ryzen 7000 series processor.
The only reason to get these 3D chips is for gaming or a workload that really benefits, if there is any outside of games.
Bigger energy savings would be had from laptops because desktop base power is relatively large due to inefficiency but really the consumption here is not that much in most people’s energy use.
Would the energy savings actually be larger if you switched to a laptop though?
AMD's comparable mobile processor, the 7945HX has a TDP between 55 and 75w and consumes over 100w during a heavy multi-core workload. When limited to 100w, it scores 33487 points in CB R23 MT. Meanwhile the 7950X3D scores 35693 when set to prefer cache and consumes 141w. Given that even at stock it's within sticking distance of the very new 7945HX, it's very possible that when limited to 100w the 7950X3D can match or even beat the power efficiency of the mobile part. It's also good to note that the 7945HX is only a few days old and is 36% faster than the i9-13980HX when both are limited to 100w so it's by far and away the most efficient part for this comparison.
Source for 7945HX info: https://www.notebookcheck.net/AMD-s...te-much-lower-power-consumption.698349.0.html
I think you are under-estimating the efficiency of the 3D cache, even without the power binning a top end laptop SKU goes though or the power optimizations you have the 7950X3D which could feasibly match a laptop chip in power efficiency.
I can think of many regions in the world where either electricity price or climate heavily incentivizes a 7950X3D or 7800X3D purchase, aside from it's class leading performance.