guys I've got a question for you :
What is SMT Enabled? What does SMT stands for? What does it do?
Can anybody please explain me cause I can't find it on the web :$
guys I've got a question for you :
What is SMT Enabled? What does SMT stands for? What does it do?
Can anybody please explain me cause I can't find it on the web :$
SMT = simultaneous multi threading, aka hyper-threading on P4's
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Heat
I'm not 100%, but I'm pretty sure it's not power based downclocking, it's merely the basis for when turbo mode is allowed to kick. The override on the 965 allows you to set that limit so that turbo mode functions nearly all the time when the cpu is in use. On the locked chips, turbo mode only kicks in when this headroom is available. There is no forced thermal throttling when these chips reach this point, just turbo mode won't kick in.
OC'ing will still work, just if you get close to the TDP, you probably won't get that extra oomph to kick in.
Right now, the cpu probably doesn't have quite enough execution throughput to fully utilize the full memory bandwidth that is available to it when all 8 virtual cores are running full bore. There's also the issue that most programs can't even get close to running these chips full bore, so there's plenty there to be used to fulfill the cpu's every whim. Prefetching probably also puts some extra use on the memory, but not much. As you can see from some benchmarks, there is a boost, just only when the cpu is pushing all 8 threads to the max.
Currently the real reason for the extra bandwidth comes from the server space. Since gainstown introduces a NUMA (non-uniform memory access) type platform on intel's line, there will be calls from one cpu to the other to get stuff stored in either chips local memory. This is the case where the bandwidth comes into play. Say CPU0 is running full speed working on some verry threaded server workload, sucking up as much memory bandwidth as it can take. Then CPU1 comes along after not finding what it needs in the memory attached to it, and requests it from the memory attached to CPU0. The bandwidth is still available to fulfill this request without causing any slowdown in what CPU0 is doing.
The real boom for tripple channel probably won't happen till westmere comes out with it's 12 virtual cores that will be even more hungry for bandwidth. Right now, the most people here with bloomfield won't really see much gain unless you're using very threaded programs, but I'm pretty sure that all the crunchers here who are thinking about a gainstown platform will see big improvements when filling all 3 channels to both sockets.
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My feeling at 4.2GHz was that there was something getting in the way but given that on removal of the core contact, three HPC cooler I noticed that only one of the HPCs was making good contact so probably poor cooling. It would happen at ~80-115C depending on the voltage so my guess is that if the temperature swing between idle and load was smaller the lock up would not happen.
We have a Titan cooler to try next, the base in smoother so I'm expecting better results.
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Main-- i7-980x @ 4.5GHZ | Asus P6X58D-E | HD5850 @ 950core 1250mem | 2x160GB intel x25-m G2's |
Wife-- i7-860 @ 3.5GHz | Gigabyte P55M-UD4 | HD5770 | 80GB Intel x25-m |
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Car-- T7400 | Kontron mini-ITX board | 80GB Intel x25-m | Azunetech X-meridian for sound |
The cost of the boards, DDR3 and the chips will prevent people from getting this right off the bat. Its clear this chip was designed for the server market where it will excel vs current Xeon Core 2 based Quads. For 95% of the desktop market Dual Core Core 2's like the 8400 will offer the best bang for your buck. Even so the platform costs are just to high(mainly the 300$ X58 boards)
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That would be nice if the 130W, 100amp limits only applied to turbo mode. That is not what the toms article says, but they could be wrong. All those i940's reaching 4ghz at idle is not relevant, as no chip will reach 130W at idle. The claim by tom's is once the chip is loaded (prime etc) if load exceeds those limits the "cpu reduces its clock speed" . What I would like to see is several of those i940's at load with prime or linpack with cpuz showing the clock speed to make sure it does not downclock on load.
It's not meant to be the mainstream platform, for that you will have to wait for Lynfield and Havendale on socket LGA1156 (around summer 2009).
EDIT: Tom is simply talking crap, besides, turbo-mode can be turned off as far as I know.
Just check the last BIOS screen on this page:
http://techreport.com/articles.x/15816/4
They also state this on the following page:
Originally Posted by The TechReport
Last edited by Helmore; 11-03-2008 at 03:02 PM.
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You say that as if it's a good thing.. The 'revolutionary' new microarchitecture is slower in certain cases than the old one?
I was fully prepared for it not being any faster in games than Penryn, that's to be expected (except for those silly, irrelevant 640x480 benches), but slower by double-digit frames per second in real-use high-res tests? Jesus, Maria, that's pretty ing retarded.
I guess that's what happens when you take the work of the geniuses in Israel and hand it to the NetBurst designers for polishing..
Now to decide whether to get a Penryn, wait this out even more and get a Sandy Bridge, or what..
i think Anandtech sums it up best in their conclusion
they really did a good review on NehalemExpecting a sequel to be a reincarnation of the original is just setting yourself up for disappointment. A good sequel will be able to stand on its own, independent of whatever may have come before it. Nehalem is Intel's Dark Knight, it lacks the reinvention that made Conroe so incredible, but it continues what was started in 2006.
hey Gary how many of these did you guys kill j/k
Tom's is incompetent.
EDIT: This is why ... http://www.tomshardware.com/reviews/...e-i7,2063.html the dimwits didn't even think about flipping that bios option "over current protection" off to try over-clocking.
Last edited by JumpingJack; 11-04-2008 at 12:36 AM.
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When the GPU horsepower is there, Nehalem shows it's muscle:
http://www.guru3d.com/article/core-i...ance-review/19
I warned people about this, that most reviewers would run it up against the GPU wall, and then conclude the CPU was not a 'gaming cpu'. For SLI/xFire setups, this will be the CPU to pair it with.You could also look at this processor as a good investment for future (much faster) graphics cards.
Last edited by JumpingJack; 11-03-2008 at 05:19 PM.
One hundred years from now It won't matter
What kind of car I drove What kind of house I lived in
How much money I had in the bank Nor what my cloths looked like.... But The world may be a little better Because, I was important In the life of a child.
-- from "Within My Power" by Forest Witcraft
Source Custom PCOriginally Posted by Custom PC
They summed up pretty good.
As Los Alamos director J. Robert Oppenheimer watched the demonstration, he later said that a line from the Hindu scripture the Bhagavad Gita came to mind:
"I am become Death, the destroyer of worlds."
Test director Kenneth Bainbridge in turn said to Oppenheimer, "Now we are all sons of b**ches." wiki
Yeah, the scatter of data we saw today ... it would be hard to recommend a pure gamer to use Core i7 unless they were really interested in having just a 'future' upgrade path with just the GPU or they are going to plunge all he way into massive multi-GPU setups.
Most all GPUs today are not well paired with this CPU, the current crop of cheaper 45 nm or Phenom/Deneb will do fine.
One hundred years from now It won't matter
What kind of car I drove What kind of house I lived in
How much money I had in the bank Nor what my cloths looked like.... But The world may be a little better Because, I was important In the life of a child.
-- from "Within My Power" by Forest Witcraft
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