The Sandy Bridge Review: Intel Core i7-2600K, i5-2500K and Core i3-2100 Tested
by Anand Lal Shimpi on January 3, 2011 12:01 AM ESTZ68
In developing its 6-series chipsets Intel wanted to minimize as much risk as possible, so much of the underlying chipset architecture is borrowed from Lynnfield’s 5-series platform. The conservative chipset development for Sandy Bridge left a hole in the lineup. The P67 chipset lets you overclock CPU and memory but it lacks the flexible display interface necessary to support SNB’s HD Graphics. The H67 chipset has an FDI so you can use the on-die GPU, however it doesn’t support CPU or memory overclocking. What about those users who don’t need a discrete GPU but still want to overclock their CPUs? With the chipsets that Intel is launching today, you’re effectively forced to buy a discrete GPU if you want to overclock your CPU. This is great for AMD/NVIDIA, but not so great for consumers who don’t need a discrete GPU and not the most sensible decision on Intel’s part.
There is a third member of the 6-series family that will begin shipping in Q2: Z68. Take P67, add processor graphics support and you’ve got Z68. It’s as simple as that. Z68 is also slated to support something called SSD Caching, which Intel hasn’t said anything to us about yet. With version 10.5 of Intel’s Rapid Storage Technology drivers, Z68 will support SSD caching. This sounds like the holy grail of SSD/HDD setups, where you have a single drive letter and the driver manages what goes on your SSD vs. HDD. Whether SSD Caching is indeed a DIY hybrid hard drive technology remains to be seen. It’s also unclear whether or not P67/H67 will get SSD Caching once 10.5 ships.
LGA-2011 Coming in Q4
One side effect of Intel’s tick-tock cadence is a staggered release update schedule for various market segments. For example, Nehalem’s release in Q4 2008 took care of the high-end desktop market, however it didn’t see an update until the beginning of 2010 with Gulftown. Similarly, while Lynnfield debuted in Q3 2009 it was left out of the 32nm refresh in early 2010. Sandy Bridge is essentially that 32nm update to Lynnfield.
So where does that leave Nehalem and Gulftown owners? For the most part, the X58 platform is a dead end. While there are some niche benefits (more PCIe lanes, more memory bandwidth, 6-core support), the majority of users would be better served by Sandy Bridge on LGA-1155.
For the users who need those benefits however, there is a version of Sandy Bridge for you. It’s codenamed Sandy Bridge-E and it’ll debut in Q4 2011. The chips will be available in both 4 and 6 core versions with a large L3 cache (Intel isn’t being specific at this point).
SNB-E will get the ring bus, on-die PCIe and all of the other features of the LGA-1155 Sandy Bridge processors, but it won’t have an integrated GPU. While current SNB parts top out at 95W TDP, SNB-E will run all the way up to 130W—similar to existing LGA-1366 parts.
The new high-end platform will require a new socket and motherboard (LGA-2011). Expect CPU prices to start off at around the $294 level of the new i7-2600 and run all the way up to $999.
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krazyderek - Monday, January 3, 2011 - link
putting the 3000 on the the 2600k and 2500k parts ALMOST made sense as an up-sell, but you can't even use their IGP when on a P series board when you're overclocking! If the Z series wont' be out for a while why the hell would i buy an overclocking chip now? so i can spend more money to replace my H series motherboard with a Z series? Nice try.It's frustrating that you have to pick your sacrifice.... you either get the 3000 with the K sku, or you get VT-d and TXT with the standard sku. Intel doesn't have an offering with both which is kind of ridiculous for high end chips.
mino - Wednesday, January 5, 2011 - link
Yeah, what is most disappointing is lack of Virtualization support even from i3's (!)For christ's sake, Virtualization is the most BASIC requirement for any box today and even s775 Pentium, not to mention the WHOLE AMD lineup have it!
For me this means nothing sub-i5 is useable in ANY capacity, business or private while i5 are (financially) and overkill for most uses.
Well done Intel. You have just lost ~100 $100 certain sales this year. Whatever, will have to wait for Llano for the mainstream stuff.
DrSlothy - Wednesday, January 12, 2011 - link
I think that's an error in the review table, though one I've seen in every Core review so far - did Intel marketing give out wrong specs?Intel website shows the entire Sandy Bridge line-up to have Hardware Virtualisation (VT-x) support, though some are missing VT-d
tech6 - Monday, January 3, 2011 - link
Another great review from Anandtech - thanks guys.It seems odd that the 3000 series graphics engine would be only included on a part designed for over clocking and the boards that support overclocking can't handle integrated graphics. I would have thought that the other way around would have made more sense.
In any case the 2600K and 2500K look like great value parts and are just what I was waiting for!
DanNeely - Monday, January 3, 2011 - link
Does anyone know if QuickSync will appear on LGA-2011 chips? I know they aren't going to have the general purpose GPU components, but this is enough of a performance booster that I'd think Intel would want to keep it on their high end consumer platform in some fashion.ThaHeretic - Monday, January 3, 2011 - link
I see TXT in the last chart above with no explanation as to what it is or why it is differentiated. They -took out- functionality from the unlocked parts? That seems backwards...Kevin G - Monday, January 3, 2011 - link
This functionality will likely appear in Sandybridge Xeons for socket 1155. Intel *generally* segments the Xeons by core count and clock speed, not by feature set like they do for consumer chips. The other feature Intel is holding back is ECC which should be standard in socket 1155 Xeons.DanNeely - Monday, January 3, 2011 - link
It's a hardware security feature. It's best known for the Trusted Platform Module; an on board cryptographic device used in some corporate computers but not used in consumer systems. Probably they just want to keep people from building high end secure servers with cheap, overclocked K parts instead of the much more profitable XEONs for 2-3x as much.http://en.wikipedia.org/wiki/Trusted_Execution_Tec...
kache - Monday, January 3, 2011 - link
I think I'll wait for the SB xeons and the new EVGA SR-2, hoping that EVGA will release it.adrien - Monday, January 3, 2011 - link
Numbers will probably speak by themselves. ;-)17:37 ~ % md5sum *.png
bee3c83b3ef49504e0608a601a03bfc2 6870.png
bee3c83b3ef49504e0608a601a03bfc2 snb.png
So the 6870 and cpu-rendering have the same image.