Wednesday, January 19, 2011
Intel plans to deliberately limit Sandy Bridge overclocking
A video leaked to HKEPC and posted on YouTube (see from 2mins onwards) confirms the fact that only a 2-3 per cent OC via Base Clock adjustments will be possible. This is because Intel has tied the speed of every bus (USB, SATA, PCI, PCI-E, CPU cores, Uncore, memory etc) to a single internal clock generator issuing the basic 100MHz Base Clock.
This clock gen is integrated into the P67 motherboard chipset and transmits the clock signal to the CPU via the DMI bus. This means there's no need for an external clock generator that used to allow completely separate control of all the individual hardware.
When you're overclocking, you want to be able to push certain frequencies, such as the Base Clock and memory clock, but leave others, such as SATA, completely stable as they're very sensitive to adjustment. Current motherboards allow multiple bus speeds because external clock generators are programmable via the BIOS.
According to one Taiwanese motherboard company, on a Sandy Bridge system, the fact that all the busses are linked means that turning up the Base Clock by just 5MHz caused the USB to fail and SATA bus to corrupt.
onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"
We chatted about possible work-arounds but at the moment the few 'asynchronous' setups tried were currently not working. It's been claimed to use out-of-the-box the design was deliberately limited with the intention to simplify board design and lower costs. This obviously has the 'unfortunate' side effect that enthusiasts will be unable to manually overclock Sandy Bridge CPUs to their limits, but the CPU's own internal overclocking, TurboBoost, will still work and Intel will offer some controlled multiplier overhead for enthusiasts as a token gesture.
At the time of writing we are still talking to Taiwan's motherboard companies, but the few we have had contact with are certainly worried as Intel's move not only impacts enthusiasts, it also takes control and emphasis away from motherboard manufacturers. After all, why would you buy one board over another if they all overclock the same? On the plus side, if a company does crack the Base Clock limit, then it means a potentially huge advantage over the competition. It's no understatement to say the next few months are crucial for the motherboard engineering teams.
On the plus side though, memory strap limits are at present removed on sample Sandy Bridge hardware - Intel's slides claim 2,133MHz - which is nice to have, but since most of the performance comes from additional CPU MHz rather than memory speed, it's not the answer we were really looking for.
HKEPC also mirror what we've heard and go further to include details Intel's upcoming LGA2011 Sandy Bridge-E and 'Patsburg' chipset that will replace the current X58 and LGA1366 platforms.
According to HKEPC the upper limit DDR3 support currently exceeds 2,666MHz (wowzers) and most importantly follows previous current generations basic designs so overclocking potential is unaffected, yet, unspecified.
Intel still plans to sell K-series CPUs which come with an unlocked CPU multiplier - and with this move, the K-series CPUs start to make a lot more sense, as they will be the only Intel CPUs capable of overclocking. Is this move a slap in the face for enthusiasts that will send them towards an AMD Fusion platform or are CPUs just getting fast enough that overclocking really doesn't matter that much to you any more?
Tuesday, March 3, 2009
Ultimate desktop: A $16,000+ PC
"Our client came to us with a need we hear often: he wanted a high performance machine, but wanted it quiet. Of course, “quiet” is a subjective term... Building a mainstream PC to be quiet isn't difficult at all, but high-performance machines are more challenging. This particular computer has four quad-core Opteron processors, 32 GB of memory, two VelociRaptor hard drives in RAID1, and six 1 TB hard drives in RAID 5. That's not a easy machine to make quiet! We opted to cool the machine with a massive radiator mounted to the side of the case, providing an extreme amount of radiator surface area, allowing us to run the fans at 5 V for nearly silent operation. And the temperature on the CPUs? 36 C at idle, 45 C at load.
We begin by testing the board under air cooling, to make sure the motherboard, CPUs, and memory are working properly. It takes half a day to run one pass of MemTest!"
More Story here
Saturday, January 3, 2009
Asus' Triton 81 CPU Cooler for Core i7 and LGA1366 Motherboards
This beauty is straight out of the Triton design philosophy and shares a lot of design elements with it's brethren. There are a pair of 90mm fans (PWM controlled blue LED models which typically operate at 18dBA) mounted on opposite sides of the fin assembly. The fins are made of aluminum and enclose four copper heat pipes which run up from the copper base. The unit measures 4.7 X 4.6 X 5.7-inches and weighs 1.5 pounds.
Not interested in the LGA1366 mainboards and the Core i7 yet? Waiting to perhaps buy after a while but still need a new cooler now? Check out the Triton 81 for plenty of backwards compatibility, including LGA775, Socket 1207, 1207+, AM2, AM2+, 939, and 940. Information on the new Triton should be available on Asus' cooling site soon.
Tuesday, December 23, 2008
Danamics Innovates the First Liquid-metal Based CPU Cooler
Sunday, December 7, 2008
Overclocking Phenom II at 6+ GHz: How AMD May Have Done It
Saturday, December 6, 2008
Intel Core i7 Overclocking - Core i7 Overclocking
World's first personal supercomputer unveiled
With its £4,000 price tag, the Tesla supercomputer is beyond the reach of most consumers, but is expected to revolutionise the way scientists and medical professionals carry out their work.
The gadget's power will allow doctors to process the results of brain and body scans much more quickly. This would allow them to tell patients within hours instead of days whether they have a tumour.
Scientists also believe that the supercomputers could help them discover cures for diseases, such as cancer and malaria, much more quickly than using traditional research methods.
This is because the device lets them run hundreds of thousands of simulations to create a shortlist of the drugs that are most likely to offer the potential for a cure.
Until now, supercomputers were massive systems made up of thousands of machines taking up entire rooms, which cost millions of pounds to build and maintain.
By contrast, Tesla personal supercomputers will cost between £4,000 and £8,000 and look much like an ordinary PC.
David Kirk, chief scientist at NVIDIA, the American company which has designed the new technology, said: "Pretty much anything that you do on your PC that takes a lot of time can be accelerated with this."
"These supercomputers can improve the time it takes to process information by 1,000 times.
"If you imagine it takes a week to get a result [from running an experiment], you can only do it 52 times a year. If it takes you minutes, you can do it constantly, and learn just as much in a day."
The new computers make innovative use of graphics processing units - a technological breakthrough, which the company claims could bring lightning speeds to the next generation of home computers.
They went on sale to British customers yesterday and will initially be sold to universities and to the scientific and research community.
The PC maker Dell, however, said that it would soon be mass producing them for the general consumer market.
Eric Greffier, a Dell senior executive, said: "Before mobile phones were reserved for the few, now we can't live without them. It will be the same with these supercomputers. They are the building block for the computing of the future."
Source: http://www.telegraph.co.uk/scienceandtechnology/technology/3564435/Worlds-first-personal-supercomputer-unveiled.html