6 ms·
"FCBGA package with 2892 pins" Yikes! Thats pretty dense on the other side, would love to see a picture. It's a 100 watts, so at 3.3 volts its drawing 30+ amp
by AstroJetson 10y ago
"FCBGA package with 2892 pins"
Yikes! Thats pretty dense on the other side, would love to see a picture.
It's a 100 watts, so at 3.3 volts its drawing 30+ amps, so I'm guessing that a good chunk of those pins are power and ground. Is that a good theory?
- xiaopanga 10y agoModern cores are more like 1V or lower. so more like 100A
- revelation 10y agoThat's crazy. Do modern cores not also use local, integrated power regulation? I think I remember an Intel PR release about that, but I don't know the detail.
- pstrateman 10y ago> Process：Manufacturing with 28nm process standard Vcc for 28nm is 850-1050mV (varies based on the exact process) so yeah more like 100A and probably that's all going through the pins without on die power regulation
- xiaopanga 10y agoThe inductors are still too big to be on-chip
- deleted 10y ago[deleted]
- hatsunearu 10y agoIntel toyed around with fully integrated inductors even in production but I think they kicked them off chip for thermal reasons.
- mattthebaker 10y agoIntel only recently introduced this feature, and it surely required a lot of R&D. At the time they were most likely the only one, and may still be.
- xorblurb 10y agoThen they removed it in their most recent chips...
- brandmeyer 10y agoIIRC, the only part they replaced was the controller IC itself. All of the main power components (switching transistors, filter inductors and capacitors) remained off-chip. Consider that the VRM's have as much or more silicon in them than in the host processor, and they have completely different breakdown voltage and switching speed requirements relative to a CPU.
- aembleton 10y agoHere's a picture of it: http://www.phytium.com.cn/Public/Home/images/ban2000.png http://www.phytium.com.cn/Public/Home/images/ban2000.png
- aluhut 10y agoSince the page is already on the way down here is a rehost: http://i.imgur.com/beAY5De.png http://i.imgur.com/beAY5De.png
- geezerjay 10y agoLook, pixel art.
- AstroJetson 10y agoThanks to the two of you, it's even more amazing than I though.
- Animats 10y agoDoes each CPU have its own path to memory?
- AstroJetson 10y agoFollowup question. Now that we know it's 100 amps of current going to the chip. In a conservertive world that would be ~300 power and another ~300 ground pins. (Could be 100 of each) Lets talk board layers. My best board was two data, one power and one ground. I was nowhere near 100 amps for current needs. How many layers in a motherboard to support this CPU? I'm thinking that these state of the art chips are really pushing the support infrastructure of board layers and power supplies. Thanks1
- hatsunearu 10y agoWho still uses 3v3 on these kinds of chips? Even cheap ass FPGAs use 1v8.