The Core i7 980X Review: Intel's First 6-Core Desktop CPU
by Anand Lal Shimpi on March 11, 2010 12:00 AM EST- Posted in
- CPUs
Final Words
I have to say that Intel's Core i7 980X is the first Extreme Edition CPU that I've ever gotten excited about. In the past you used to have to choose between more cores or high clock speeds. Thanks to power gating and Gulftown's PMU, those days are over. The 980X gives you its best regardless of what you throw at it. Lightly threaded apps benefit from the larger L3 cache and heavily threaded apps take advantage of the extra cores. The performance advantage you get at the low end ranges from 0 - 7%, and on the high end with well threaded code you're looking at an extra 20 - 50% over the Core i7 975. Even more if you compare to a pedestrian processor. There are a few cases where the 980X does lose out to the Core i7 975 thanks to its higher latency L3 cache, but for the most part it's smooth sailling for the 6-core beast.
The performance advantage comes at no extra power cost either. Enabling 6 cores on a 32nm process means that the die actually got smaller and power consumption remained mostly unchanged. It really is the best of both worlds, at least for a 130W chip. It's almost Conroe-like in its ability to dominate the charts without any technical limitations. If money were no object, the Core i7 980X is clearly the best you can get.
The only problem is price, as is always the case with these Extreme Edition processors. While I don't expect 6-core CPUs to trickle down to the mainstream, if we had a version priced at ~$500 it would be an amazingly easy sell. I wonder where Intel will price the Core i7 970, allegedly also a 6-core Gulftown derivative. We'll have to wait another quarter to find out.
Even taking into account price, if you do any significant amount of compute intensive 3D work, video encoding or Excel modeling, the Core i7 980X is worth it. If you're the type of user who always buys the Extreme Edition knowing that you can get better bang for your buck further down the lineup, this time you're actually getting your money's worth. On the desktop, the next 12 months are fairly stagnant in terms of CPU performance improvements. We'll see a clock bump to the 980X at the beginning of 2011, but it'll be even longer before we get a replacement.
There is of course the higher powered alternative. You could pick up a dual-socket Xeon board and a pair of quad-core Nehalem Xeons for a bit more than a X58 + 980X. You'd end up with more cores, albeit with a higher power budget and higher price tag. The Core i7 980X is such a difficult processor to recommend. It's something I'd personally never spend the money on. But if I needed more compute in a single chip, it's really the only thing that could scratch that itch.
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aigomorla - Thursday, March 11, 2010 - link
W3680 will be a workstation hexcore @ 3.2ghzIm guessing since its a 3600 series, it will be a 1 x QPI, so it will not work in tandium on a DP board.
Xeons are uber expensive tho.
And this one if its gonna be priced like the W3580's is gonna have a price of around 1499.
:X
Rev1 - Thursday, March 11, 2010 - link
I know the OC's were on stock cooling but being this chip starts out @ 3.33 ghz and having a smaller 32nm size, the OC capability seems very underwhelming. I heard this chip is good for extreme overclockers because they did away with the cold boot bug. This thing probably puts out to much heat for any current air or wc setup to get a good oc out. That being said i dont see replacing my D0 920 anytime soon.aigomorla - Thursday, March 11, 2010 - link
come to our cpu and overclocking forum.http://forums.anandtech.com/showthread.php?t=20576...">http://forums.anandtech.com/showthread.php?t=20576...
Or read one of my comments with a forum link.
I showed people what it can do on higher voltages, when you take heat away from the equation of being the limited value.
Hacp - Thursday, March 11, 2010 - link
With the 800 dollar premium over an I7 920, why don't you just build a second 920 system instead!aigomorla - Thursday, March 11, 2010 - link
http://forums.anandtech.com/showthread.php?t=20450...">http://forums.anandtech.com/showthread.php?t=20450...;)
I welcome you guys to join our forums.
You'll see more info on stuff on the OC potentials in that preview.
atfuser - Thursday, March 11, 2010 - link
Looks like the i7-860 is where gamers and people who run lots of multicore apps want to spend their money. Gamers will save $750 and will see almost no difference in performance.RaistlinZ - Thursday, March 11, 2010 - link
Yes, gamers will still be more than satisfied with their i7 920's @ 4Ghz. Especially considering those chips are only $200 at Microcenter these days.I just hope the upcoming Xeon CPU's will have more of a mainstream price.
quickbunnie - Thursday, March 11, 2010 - link
I think the L4D performance is actually due to the extra cores, as source engine games have n-1 multithreaded scaling. It's been shown to have diminishing returns past 3-4 cores, so a 6% bump for an extra 2 cores makes more sense to me than the extra cache, considering no other games show this level of performance increasevailr - Thursday, March 11, 2010 - link
What happens if you put this 6 core CPU in a non-upgraded bios X58 board? Do you then have the minimal functionality to be able to flash the bios to the updated version? Or does the system fail completely, to even show anything on the video display?Just wondering...
aigomorla - Thursday, March 11, 2010 - link
If your bios can not handle gulftown, it will just refuse to post.eVGA boards are even more picky. If you somehow manage to get a hold of an A0 stepping gulftown, you can not use the same bios on a B0 or B1 gulftown.
The b0 and b1 are the retail versions, while the A series were pure evaluation / testing samples.
Some asus boards should support gulftown without bios updates, however its still recommended u get one.
And if u guys come into our forums, you will see i pushed one up to 4.4ghz with HT ON, @ 1.388 vcore, so i think my 980X is better then the one Raja has.
Sorry Raja.. :P