4 ms·
Because of space constraints and power constraints. It isn't only the space for the memory that you need. You also need space on the die for the memory controll
by lwkl 3y ago
Because of space constraints and power constraints. It isn't only the space for the memory that you need. You also need space on the die for the memory controller, caches and the memory channels.
If you look at annotated die shots of these CPUs you can see that the memory controllers use significant space on the die. So if you wanted to add more memory you needed to remove something else on the chip. Also you might need to change the cache hierarchy and the layout of the chip.
Like everything else in chip design this is a trade off. And the chip designers make different trade offs for server CPUs that can support up to multiple terabytes of RAM. If there were a big enough demand for a mobile chip with more RAM they would probably make one.
[1] die shots: https://twitter.com/highyieldYT/status/1719379808516280716 https://twitter.com/highyieldYT/status/1719379808516280716
Edit: I might have misunderstood the OP.
The two biggest reasons are laptops have only 8 or 16 GB memory because most people don't need any more than that and the people that need more are willing to pay the markup.
- duped 3y agoNo one is asking for terabytes of RAM in a laptop. I have two 16GB SODIMMs installed right now on a consumer laptop with a consumer processor that I'm typing this on. So it's hard to chock this up to anything but nonsense.
- lwkl 3y agoI might have misunderstood the OP. High end models are more expensive because the people that buy them are either businesses or enthusiasts. So they either have a monetary gain from the higher performance or they just want the best thing. SO both of them will pay a reasonable markup. Another reason is that the high-end laptops are a low volume product so this increases the cost of handling them. So naturally you would have consider this in the price.
- figassis 3y agoThey’re low volume because they’re unreasonably expensive, not the other way around.
- sonicanatidae 3y agoSure, a reasonable markup, but we're talking about a company that will sell you a charging cable for $100+ with a straight face.
- wlesieutre 3y agoWhich cable is that?
- HappMacDonald 3y agoThe other one
- sonicanatidae 3y agohttps://www.apple.com/shop/product/MN713AM/A/thunderbolt-4-usb%E2%80%91c-pro-cable-18-m?afid=p238%7CsJOguDArN-dc_mtid_1870765e38482_pcrid_652838197326_pgrid_147153194586_pntwk_g_pchan_local_pexid__&cid=aos-us-kwgo-pla-btb_lia--slid---product-MN713AM/A https://www.apple.com/shop/product/MN713AM/A/thunderbolt-4-u...
- wlesieutre 3y agoBit of a stretch to call that a "charging cable." Their 240W rated 2 meter USB-C charging cable is $30 https://www.apple.com/shop/product/MU2G3AM/A/ https://www.apple.com/shop/product/MU2G3AM/A/ But if you're interested in why the Thunderbolt cable costs more than charging cables, some folks put one through a CT scanner recently: https://www.youtube.com/watch?v=AD5aAd8Oy84 https://www.youtube.com/watch?v=AD5aAd8Oy84
- sonicanatidae 3y agoThat's fair, as it does more than just charge. Let's take another example from Apple: https://www.apple.com/shop/product/MWUG2LL/A/pro-stand https://www.apple.com/shop/product/MWUG2LL/A/pro-stand
- 3y ago
- PH95VuimJjqBqy 3y agowhich is why the only laptops in my home are the ones purchased by my employer.