3 ms·
>and halves the power usage of a traditional design. Um, really? Rumors talk of a 65W (and a 100W) Kaby Lake G CPU. The CPU is 4C/8T @ 3.1/4.1. That's 10% more
by chx 9y ago
>and halves the power usage of a traditional design.
Um, really? Rumors talk of a 65W (and a 100W) Kaby Lake G CPU. The CPU is 4C/8T @ 3.1/4.1. That's 10% more than the 7700HQ which is 45W. The GPU side is rumored to be 1000MHz 24CU and 4GB HBM2 @ 700 MHz.
Now the Ryzen 5 2500U is a 15W part with 8 CUs up to 1100 MHz. The CPU surely eats some watts out of that so I do not think it's too outlandish to claim 24 CUs eat less than 30W especially with a lower frequency.
All in all, I absolutely can't see the claimed gigantic power usage savings Intel purports here. It looks like 10% perhaps 15% based on the above data. What am I missing?
- aeleos 9y agoI understood that statement as saying they were halving the power usage compared to a traditionally designed chip interconnect that uses ordinary traces rather than the EMIB silicon chip talked about in the article. Not halving the power usage of the entire chip, just the power required for the chip connection.
- chx 9y agoBewildering. Does a chip interconnect consume anything worthwhile mentioning? Wouldn't that be converted to heat? I have never heard of the motherboard itself heating up... Edit: yes, the VRM and the chipset itself have beefy heatsinks but not the interconnect between them. https://images.evga.com/products/gallery/131-SX-E295-KR_XL_5.jpg https://images.evga.com/products/gallery/131-SX-E295-KR_XL_5... look at the bazillion traces running on the PCB.
- dbcurtis 9y agoIt is the drivers on the chip required to go off-chip that consume power and create heat. Look at a die photo. Those wee little transistors in the middle? Logic and memory. Those giagantic cow turds around the edge? I/O drivers.
- yvdriess 9y agoThe heat density of off-chip interconnects are low, but that does not mean non-zero power consumption.
- mjw1007 9y agoI expect they mean EMIB halves the amount of power used for communicating between the CPU part and the GPU part.