The reviews that compared 4.8GHz Sandy vs 4.8GHz SB was showing a bit less than 10%, seems more like 5% on avg in that case.
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here is tested 2600K PCIe 2.0 vs 3770K PCIe 3.0
http://www.motherboards.org/review/i...-core-i7-3770k
heres another
http://www.bjorn3d.com/articles/Inte...idge/2214.html
I wonder if there will be a newer stepping to get the heat down.
Am abit dissapointed its looking like i may skip ivy bridge and just invest in a i7-3930K.
ivy bridge might be the impetus necessary for someone to build a vapor chamber water block. you could modify a video card heatsink as the prototype. the ivy bridge chip is so small, the surface area needs to be increased as efficiently as possible. that means off with the heat spreader, off with the copper block, and on with a phase change!
An IHS stripping test would be much appreciated.
Go for it Marc !!
Any iGPU overclocking articles? :)
I was gonna say, all the reviews I was reading completely skipped the thermal part, lmao.
Yes that is what made most of the reviews rather worthless in my opinion. There are some to have them, but we recently had the Bulldozer launch and there was no shortage of testing of thermals (or power) as their should be. Heat is an integral metric that many people use to compare products and need to know so that adequate cooling is supplied. I eventually did see some reviews with some thermal testing (why most who did overclocking wouldn't include it is beyond me - especially ananad who almost always include a comparison of thermals and overclocking on both aftermarket and supplied stock heatsinks).
I'm not saying there is a conspiracy, but it doesn't make sense why so many reviews lacked temp information. I'm considering getting an IB setup this summer as I want something with good power and I don't want to get something rather warm.
I only hit the button once...
Since it double posted might as well add this:
http://hwbot.org/newsflash/1685_why_...d_22nm_process
Quote:
Maybe you know, Ivy Bridge are around the corner. Maybe you knows too, they are worst clocker then Sandy Bridge. We know why ...
As you know, Intel is with the 22nm production late. Production is not good, and there are big problems with the chips. The original "on paper" concept of 22nm chip with Tri-gate transistors is extremely low supply voltage. But, with current revisions Intel can not keep voltage in planned values. This is a problem. The chips have a higher voltage than planned, broadly comparable with Sandy Bridge. And that's wrong.
Tri-gate transistor needs to switch to a lower voltage. But for a correct recognition of the I/O status needs more current than planar transistor. Three-gate area is greater than one-gate and the current is several times higher than in Sandy Bridge chips. When Intel reach a planned low voltage, everything will be fine. Lower voltage means acceptable currents, less leakage and a great consumption. Unfortunately, it does not meet the current "E1" revision.
Current 22nm chips have high voltage, higher than they should have. The values are similar to Sandy Bridge chips. Properly should be the default voltage below 1V and it is not now. But Ivy Bridge needs a lower voltage, at the same voltage as Sandy Bridge consumption and temperature is significantly higher due to higher currents in the chip.
Basic Ivy Bridge idle voltage is above 1V, higher than Sandy Bridge. The load voltage is lower than that of Sandy Bridge and consumption is lower, but temperatures are higher. If the Ivy Bridge voltage increases, consumption and temperatures extremely jumps up. This problem can be solved only by improving the production, so maybe its time for another revision. Indeed it may be a potential problem in laptops with the highest third-generation Core i7 models.
In the desktop this problem occur with less overclocking than Sandy Bridge and significantly higher power consumption and temperatures. If you have a nice 5GHz + Sandy Bridge, keep it for now. Ivy Bridge ends with overclocking on the air somewhere around 4.6 to 4.7 GHz. But slightly lower overclocking then Sandies compensates higher performance per clock, so it is not a major problem.
i doubt removing the IHS would have any benefit at all unless a direct impingement block was used, as mention earlier. The solder used to attach the IHS to the die has much better thermal conductivity than the thermal pastes that we use for our heatsinks. So by removing the IHS, which helps spread the heat out over a greater area helping our heatsink/waterblock extract that heat, you would probably see a rise in temperature.
From all the reviews the best(IMO) is the vr-zone's 4.8Ghz showdown between SB and IB:
http://vr-zone.com/articles/ivy-brid...own/15637.html
Nice tables with % difference in a lot of desktop workloads. Power numbers (when OCed) too.Very nicely done.
Their conclusion/summary is all one needs to know when it comes to IB:
Quote:
Originally Posted by vr zone
Still in dutch, english article at the shrimps will be up tonite normally. But the graphs tell the tale
http://www.4tech.be/nl/review/intel-...i7-3770k?page=
3570K played nice up to 1600mhz with 0.15 voltage added; the 3770K was not stable over 1450mhz iGPU...
With extra system ram speed, the games scaled too... but still a long way to go for Intel to catch up with AMD APU
There is a big misconception that because the tim used between the ihs and the core (indium-gallium solder), it is what makes it an effective heatspreader. However, tim only serves to fill the gaps between the ihs (copper) and the core, where air will normally be to fill in the microscopic gaps/imperfections in the surface between the heatspreader and the core. The majority of the thermal conductivity is closer to 400W/mK. Replacing the ihs with the cooler directly will increase thermal performance, because the tim does not make up the majority of the contact. (or it shouldn't. If it is, you don't understand how tim works!)