The Sandy Bridge Preview
by Anand Lal Shimpi on August 27, 2010 2:38 PM ESTA New Socket and New Chipsets
There’s no nice way to put this: Sandy Bridge marks the third new socket Intel will have introduced since 2008. The first was LGA-1366 for the original Nehalem based Core i7. In 2009 we got LGA-1156 for Lynnfield, later updated with support for the dual-core Clarkdale CPUs launched in 2010. Next year, Sandy Bridge will launch with LGA-1155.
The CPU and socket are not compatible with existing motherboards or CPUs. That’s right, if you want to buy Sandy Bridge you’ll need a new motherboard.
As is the case today, there are two lines of chipsets for consumer desktops: H and P series. The H series supports Sandy Bridge’s on-die graphics, while the P series is strictly for discrete graphics.
At launch we’ll have P67 and H67 based motherboards, both of which are in testing right now. A quarter later we’ll see value H61 motherboards added to the mix.
| Chipset Comparison | ||||||
| P67 | H67 | H61 | P55 | H57 | H55 | |
| CPU Support | Sandy Bridge LGA-1155 | Sandy Bridge LGA-1155 | Sandy Bridge LGA-1155 | Lynnfield / Clarkdale LGA-1156 | Lynnfield / Clarkdale LGA-1156 | Lynnfield / Clarkdale LGA-1156 |
| CPU PCIe Config | 1 x 16 or 2 x 8 PCIe 2.0 | 1 x 16 PCIe 2.0 | 1 x 16 PCIe 2.0 | 1 x 16 or 2 x 8 PCIe 2.0 | 1 x 16 PCIe 2.0 | 1 x 16 PCIe 2.0 |
| RAID Support | Yes | Yes | No | Yes | Yes | Mp |
| USB 2.0 Ports | 14 | 14 | 10 | 14 | 14 | 12 |
| SATA Total (Max Number of 6Gbps Ports) | 6 (2) | 6 (2) | 4 (0) | 6 (0) | 6 (0) | 6 (0) |
| PCIe Lanes | 8 (5GT/s) | 8 (5GT/s) | 6 (5GT/s) | 8 (2.5GT/s) | 8 (2.5GT/s) | 6 (2.5GT/s) |
With P67 you lose integrated graphics but you gain the ability to run two PCIe x8 cards off of the CPU. You also get fully unlocked memory multipliers with P67, whereas H67 is locked to whatever official DDR3 speeds Intel supports with Sandy Bridge (currently DDR3-1333).
Both H67 and P67 support 6Gbps SATA, however only on two ports. The remaining 4 SATA ports are 3Gbps. Motherboard manufacturers will color the 6Gbps ports differently to differentiate.
There’s no native USB 3.0 support on these chipsets, but most motherboard makers are looking to third party solutions to enable USB 3 on Sandy Bridge boards.
The other major (and welcome) change is the move to PCIe 2.0 lanes running at 5GT/s. Currently, Intel chipsets support PCIe 2.0 but they only run at 2.5GT/s, which limits them to a maximum of 250MB/s per direction per lane. This is a problem with high bandwidth USB 3.0 and 6Gbps SATA interfaces connected over PCIe x1 slots. With the move to 5GT/s, Intel is at feature parity with AMD’s chipsets and more importantly the bandwidth limits are a lot higher. A single PCIe x1 slot on a P67 motherboard can support up to 500MB/s of bandwidth in each direction (1GB/s bidirectional bandwidth).
With native 6Gbps SATA support, the faster PCIe interface will be useful for any third party USB 3.0 controllers.
Original Nehalem and Gulftown owners have their own socket replacement to look forward to. In the second half of 2011 Intel will replace LGA-1366 with LGA-2011. LGA-2011 adds support for four DDR3 memory channels and the first 6+ core Sandy Bridge processors.
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AndreC - Saturday, August 28, 2010 - link
Hi there.. I`m currently a freelance 3D generalist.. and I was going to upgrade my old Core 2 Quad QX6700 with a Core i7 980X. But now i`m not that confident. Sandy bridge looks amazing, I was sad seeing the new socket for sandy bridge, it does not compell me to buy a new motherboard now... does anyone know if the 1366 socket will stick with the nex gen High end market? I dont want to shoot myself in the foot here.AndreC - Saturday, August 28, 2010 - link
Sorry dind`t read the last frase...Great Review btw. cheers
sdsdv10 - Saturday, August 28, 2010 - link
As noted in the Intel roadmap in the article, for at least part of 2011 they will be sticking with 1366 for the release of the Core i7 990X (to replace the 980X). However, after that the Intel performance platform will switch over to socket LGA-2011. Here is a quote from the articlea (page 3)."Original Nehalem and Gulftown owners have their own socket replacement to look forward to. In the second half of 2011 Intel will replace LGA-1366 with LGA-2011. LGA-2011 adds support for four DDR3 memory channels and the first 6+ core Sandy Bridge processors."
AndreC - Saturday, August 28, 2010 - link
Yeah.. as I said "Sorry dind`t read the last frase..." but thx anyway..It`s a shame to be always changing sockets, but probabily a necessity to evolve the technology.
Kaihekoa - Saturday, August 28, 2010 - link
Having the first chips target the mainstream market is a very smart move by Intel because that's where AMD makes it's money. I'm honestly not impressed by the performance numbers, but I am impressed by the overall performance, power consumption, and pricepoints for these next gen CPUs. What I'm really looking forward to is the performance segment of Sandy Bridge.mino - Saturday, August 28, 2010 - link
Intel's mainstream is not where AMD's is.Especially in 2011.
Ontario:
. . . CPU - above Atom, under everything else
. . . GPU - 5450/Sandy class
Lliano:
. . . CPU - 2C Sandy class
. . . GPU - 5650 class (at least 3x Sandy)
Bulldozer Desktop(8C):
. . . CPU - 4C Sandy Class
. . . GPU - discrete 5750+ class
So basically AMD's platform in the Intel's "mainstream" $200+ class will be a Bulldozer with discrete GPU. Aka AMD's high end stuff.
silverblue - Saturday, August 28, 2010 - link
Not sure I agree with that. From AMD's own figures, Bulldozer is significantly faster than STARS. It would be more realistic to expect Bulldozer to perform closely to Sandy Bridge, however we really need more benchmarks before we get a true idea. Bulldozer looks great on paper, but that's virtually all we have so far.In any case, you compared Bulldozer to "4C Sandy Class", which would be an 8-thread Sandy Bridge, and thus - at least relatively - high end. And I'm not getting into the core/module argument again... ;)
mino - Sunday, August 29, 2010 - link
What I wanted to point out is that Intel sees the 4C Sandy as a "mainstream" part.Reason being they are moving HUGE amounts (compared to AMD) of $150-$250 parts.
On the other hand, AMD sees the mainstream at $100-$200 and that is a Llano market.
For AMD, Zambezi is high-end that justifies discrete GPU.
And Yes, Bulldozer 8C should compare with 4C Sandy favorably, (it would mostly go to pricing).
tatertot - Sunday, August 29, 2010 - link
BD 8C is going to be up against 8C and 6C Sandy on LGA-2011 in the client space.mino - Monday, August 30, 2010 - link
am sure AMD WOULD like it that way. But no. Not really.8C Bulldozer versus 6C Sandy might actually be competitive.
However 32nm SOI is a new process so we might as well forget about 4GHz parts for now.
Also, Sandy 6C is Q4 part and 8C is most probably 2012 part.