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July 27th, 2023 07:00
Confused about CAMM
I'm considering a 7680 laptop (after returning a 7670 a year ago because of poor performance) but am confused about CAMM. It appears the only way to get 128 GB in a Dell these days is with CAMM.
Here's where I'm confused: the script that sales is reading me says CAMM is faster than SODIMM. I understand the theory (shorter traces, etc.) but the 128 GB CAMM Dell offers is DDR5 3600, significantly slower than the 128 GB of DDR5 4800 that's in my Lenovo P16 right now.
What am I missing?
Thanks
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ejn63
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July 27th, 2023 10:00
In addition to the potential for greater speed due to the proximity to the CPU, CAMM has packaging advantages over soDIMMs (and unlike the other alternative, soldered-on LPDDR, it's replaceable, at least). As for the speed difference, it could be that a 128G CAMM running faster than 3600 is not stable, or it isn't compliant with RF emissions when running at that speed.
It remains to be seen if CAMM catches on with other manufacturers -- if it doesn't, it will forever be more expensive than soDIMM memory (though if you're ordering with maxed-out RAM, that may not be an issue).
richardgames
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July 27th, 2023 11:00
"it could be that a 128G CAMM running faster than 3600 is not stable, or it isn't compliant with RF emissions when running at that speed."
If so, that gets at the crux of my question. SODIMM doesn't have those issues - I'm using it right now. So.... what's the point of CAMM?
Yes it's thinner, but by the thickness of a penny. I don't see how that matters. Is losing that much memory bandwidth worth the thickness of a penny?
Dunno. I just can't make any sense of the thickness argument and everything I've read about speed is at odds with what's actually out there.
It's a mystery to me...!