Intel’s Roadmap: Ivy Bridge, Panther Point, and SSDs

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• DanNeely - Friday, May 6, 2011 - link

  looks like it's not going quite as fast as was expected; prior rumors had it stripped from the x79 chip too.
  
  OTOH if filling in all the expansion slots in an ATX board would've been tricky with x79, it's going to be even worse for enthusiast z7x boards unless the number of lanes on the southbridge is increased, especially if DMI isn't given a boost to allow the SB lanes to run at 3.0 speeds as well. 2x gb nics, and 3rd party audio will take 3 lanes. Additional usb3 and sata 6gb controllers will take 1 each. That leaves at most 3 SB lanes to make 1x slots. The situation is worse if the board makers insist on adding legacy firewire or pata ports. Thunderbolt ports will IIRC eat a PCIe lane each as well. I suspect 4 to 8 lane pcie bridge chips (or possibly PCIe to PCI bridge chips) will end up being fairly common on these boards.

• JarredWalton - Friday, May 6, 2011 - link

  Do the current 6-series chipsets connect to the CPU with a 20Gbps DMI link, which isn't even enough for all the potential peripherals if they're all maxed out, but in practice that almost never happens.
  
  8x PCIe 2.0 lanes = 40Gbps
  2x SATA 6Gbps = 12Gbps
  4x SATA 3Gbps = 12Gbps
  14x USB 2.0 = 6.72Gbps
  Gigabit Ethernet = 1Gbps
  --------------------------------
  Total Potential = 71.72Gbps!
  
  I believe the 7-series is still using DMI 2.0, so it remains at 20Gbps, but now the total potential bandwidth for all ports is:
  
  8x PCIe 2.0 lanes = 40Gbps
  4x USB 3.0 = 19.2Gbps
  2x SATA 6Gbps = 12Gbps
  4x SATA 3Gbps = 12Gbps
  10x USB 2.0 = 4.8Gbps
  Gigabit Ethernet = 1Gbps
  --------------------------------
  Total Potential = 89Gbps
  
  Realistically, the SATA ports are pretty much never going to all be 100% utilized at the same time, and the same goes for the PCIe ports and USB ports. It's possible Intel will tweak the DMI interface to boost bandwidth as well, which could easily accommodate the additional bandwidth heavy devices.

• DanNeely - Friday, May 6, 2011 - link

  I was looking at the number of devices to connect, not total bandwidth (pcie to pci or pcie-pcie (more lanes) bridge chips don't help with that.
  
  My observation is that after you connect all the devices to the PCIe bus that need to be connected, you don't have enough lanes left to fill out all 7 slots on an enthusiast level full atx board. Depending on the chipset you have anywhere between 1 and 3 slots off the CPU, and at most 3 1x slots off the southbridge. With thunderbolt potentially eating a 6th, and a few of the 6x series boards having enough USB3 controllers to have 8 or 10 USB3 ports, it's entirely possible to use up all of the southbridge's 8 lanes just on onboard controllers. The main advantage I see in potentially running the SB lanes at PCIe3 speeds isn't total bandwidth which isn't likely to be saturated; but allowing board makers to use 4xUSB,3 4x SATA6GB, or 2x GB nic controllers to get their port inflation numbers up while only consuming a single PCIe lane instead of 2.

• DanNeely - Friday, May 6, 2011 - link

  That or they should bump the number of lanes on the southbridge from 8 to 12ish to allow connecting as many low average bandwidth devices as they could when the PCI controller was still available. IIRC the controller on Intel's current desktop boards supports 5 PCI devices.

• Ammaross - Friday, May 6, 2011 - link

  If you remember, current P67 motherboards share PCIe lanes. If you drop a card in the bottom PCIe gfx 4x slot, it disables some on-board things (firewire, some USB headers, etc). In essence, the lanes are shared amongst the devices already.

• DanNeely - Friday, May 6, 2011 - link

  I wasn't aware of anything like that, I assume the disabled headers are USB3 since there's no reason to disable any of the USB2 ports. The firewire port surprises me though, I'd always assumed it would have been stuck on the legacy PCI bus since there's plenty of capacity there and no need for the higher speeds of PCIe.

• DanNeely - Friday, May 6, 2011 - link

  While you're probably right about it not seeing much traction in the enthusiast market, assuming it trickles down to the mobile chipset as well, support for a third monitor would be really nice for my work laptop.

• iwod - Friday, May 6, 2011 - link

  This basically are the rumors we have heard from other places summed up here. Of coz being Anandtech this means the rumors are realistic.
  
  The EU are properly a lot different to current SandyBridge, We expect to have double the Gfx Performance from Ivy Bridge. If any of the previous Intel slide are to be trusted. 22nm would also allow much higher Clock Speed for GPU part.
  
  I hope Anandtech could find out whether Ivy Bridge have FMA.
  
  $100 for a 20GB SLC SSD is really expensive, compare to the previous rumors of 40 - 50 USD.

• Kristian Vättö - Friday, May 6, 2011 - link

  Ivy Bridge IGP will only have 16 EUs which is only 33% more than what SB has. Like Anand mentioned in the SB review, it unfortunately looks unlikely that the IB IGP would be twice as fast, which is a shame.
  
  In the original version, I said the "Larsen Creek" SSD will be priced at around 50$ like the rumors have suggested but apparently Jarred edited that. Of course it is safer to say 100$ and then be happily surprised when it turns out to be 50$ instead of getting those angry comments when it turned out to be 100$ instead of 50$.

• iwod - Friday, May 6, 2011 - link

  My thought is that these "Next Gen EU " would be completely different to current EU, that is why it is not fair to compare EU numbers to performance.
  
  And if this new EU runs 33% faster per clock, and runs at 33% higher clock while having 33% more EU then previous EU, should land us at 100% performance increase.
  
  Of coz, Hardware dont matter much on GPU, not at all. It is software, drivers that makes ALL the difference. As we have seen with S3. Nvidia has double the Software Engineering compare to hardware working on it. And if Intel continue the way it is, their GPU hardware will never get the respect they deserve.
  
  I am looking forward to the Larsen Creek SSD.