sexta-feira, 29 de março de 2013

External Graphics Over PCIe 3.0? Netstor's NA255A, Reviewed

URL: http://www.pheedcontent.com/click.phdo?i=a4816868ee03119b423fb21dc59a5cf9


External Graphics Over PCIe 3.0? Netstor's NA255A, ReviewedNetstor sent over its TurboBox NA255A, an external enclosure capable of accommodating four dual-slot graphics cards across one 16-lane PCI Express 3.0 connection. Is this thing fast enough for general-purpose GPU compute workloads? How about gaming?

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quinta-feira, 21 de março de 2013

New Advance In 3D TV Technology

URL: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/YFGKfZe3Dh0/story01.htm


sciencehabit writes "If you've pondered whether to sink a cool couple of grand into a fancy new three-dimensional TV but didn't want to mess around with those dorky glasses, you may want to sit tight for a few more years. Researchers at Hewlett Packard Laboratories in Palo Alto, California, report that they've come up with a new 3D technology that not only doesn't require viewers to wear special glasses, but it also can be viewed from a wide variety of angles. The advance could propel the development of mobile 3D devices as well as TVs."

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Core i7-4770K: Haswell's Performance, Previewed

URL: http://www.pheedcontent.com/click.phdo?i=ed26d4e54554f9441fe01039da2e2eab


Core i7-4770K: Haswell's Performance, PreviewedA recent trip got us access to an early sample of Intel's upcoming Core i7-4770K. We compare its performance to Ivy Bridge- and Sandy Bridge-based processors, so you have some idea what to expect when Intel officially introduces its Haswell architecture.

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quinta-feira, 14 de março de 2013

CPU Air Cooler Roundup: Six Coolers from Noctua, SilverStone, be quiet!, and Cooler Master

URL: http://www.anandtech.com/show/6830/cpu-air-cooler-roundup-six-coolers-from-noctua-silverstone-and-cooler-master


Now that CPU cooler reviews have begun in earnest here at AnandTech, it's been interesting to see just how conventional wisdom plays out in practice. There's been a pervasive attitude that closed loop coolers are only really competitive with the highest end air coolers, and there may be some truth to that, but we have at least one of those flagship coolers on hand today along with parts from SilverStone and Cooler Master.

terça-feira, 5 de março de 2013

Seagate Announces New Laptop and Desktop SSHDs (Solid State Hybrid Drives)

URL: http://anandtech.feedsportal.com/c/34653/f/635203/s/2939e953/l/0L0Sanandtech0N0Cshow0C68160Cseagate0Eannounces0Elaptop0Eand0Edesktop0Esshds0Esolid0Estate0Ehybrid0Edrives/story01.htm


A few days ago we reported that Seagate would stop selling 7200 RPM 2.5” hard drives by the end of the year. Now we know why. Seagate will continue to offer 5400 RPM 2.5” drives, but if you want more performance without diving into the performance/capacity tradeoffs of an SSD Seagate will offer you its 3rd generation solid state hybrid drive (SSHD).

Once sold under the Momentus XT brand, the 3rd gen hybrid drives will simply be sold under the SSHD moniker. As Seagate alluded to many times in the past, we’ll also be getting a 3.5” hybrid drive as well. The two families will simply be called the Seagate Laptop SSHD and Seagate Desktop SSHD.

While both families will have many members, at launch we’ll see the following:

Seagate SSHD Lineup 1H 2013
  Capacity Form Factor Platters Speed NAND Price
Seagate Laptop SSHD 500GB 2.5" 7mm 1 5400 RPM 8GB MLC $79
Seagate Laptop SSHD 1TB 2.5" 9.5mm 2 5400 RPM 8GB MLC $99
Seagate Desktop SSHD 1TB 3.5" 1 7200 RPM 8GB MLC $99
Seagate Desktop SSHD 2TB 3.5" 2 7200 RPM 8GB MLC $149

All of the drives use a standard SATA interface, and all of them feature 8GB of MLC NAND (with a small portion of the NAND set aside for use in SLC mode, similar to SanDisk’s nCache). This is a disappointingly small amount of NAND, however Seagate hinted at future, higher performance versions shipping with somewhere around 32GB of NAND. As we found in our investigation of Apple’s Fusion Drive, the ideal number is likely somewhere in the 128GB - 256GB range but that puts you in a very different price class.

The benefit of using only 8GB of NAND is that Seagate is able to keep prices very low. Both Laptop and Desktop SSHDs are expected to carry around a $15 - $20 price premium over competing 7200RPM alternatives.

The NAND mostly acts as a read cache, although this time around Seagate claims it will be able to cache some writes. Seagate is understandably sensitive to writing tons of data to the NAND since it’s only an 8GB MLC device, but endurance shouldn’t be too much of a problem to navigate around with good firmware. There’s no data separation, everything that is written to NAND also exists on the hard drive - although it’s not clear if that write happens in tandem or sequentially.

Seagate is particularly proud of their very low time to use performance with the new SSHDs. Apparently Seagate aggressively tuned its algorithms to cache roughly all accesses that happen within the first minute of power on.

Although I’m not very excited about the performance of these drives compared to SSDs, their low price should make Seagate’s SSHDs an obvious choice compared to a traditional hard drive. The fact that we’ll get both 2.5” and 3.5” SSHDs is nice since many SSD users on the desktop are still consumers of mechanical drives as well. Personally I’m not sure how much I’d benefit from using Seagate’s Desktop SSHDs in my RAID array since I mostly do large block sequential transfers (which would be uncached) to/from the array. For gamers or folks who have an SSD that’s smaller than their total application footprint these SSHDs might be compelling.

When I first reviewed the Momentus XT I concluded “There's no reason for any performance oriented mechanical drive to ship without at least some small amount of NAND on board.” Three years later, it looks like that vision has finally come to be.



segunda-feira, 4 de março de 2013

ioSafe N2: A Disaster-Resistant Synology DS213

URL: http://anandtech.feedsportal.com/c/34653/f/635203/s/293168a9/l/0L0Sanandtech0N0Cshow0C680A60Ciosafe0En20Ea0Edisasterresistant0Esynology0Eds213/story01.htm


The emergence of the digital economy has brought to fore the importance of safeguarding electronic data. We have discussed the 3-2-1 data backup strategy before in the piece where we covered ioSafe's Indiegogo campaign. The strategy involves keeping three copies of all essential data, spread over at least two different devices with at least one of them being off-site or disaster-resistant in some way. It is almost impossible to keep a copy of large frequently updated data sets current in an off-site data backup strategy. This is where companies like ioSafe come in.

We had reviewed ioSafe's SoloPRO, a disaster-resistant external hard drive last year and it is now the turn of the ioSafe N2 network attached storage unit to be put under the microscope. The ioSafe N2 is a Synology DS213 in a disaster-resistant chassis. Read on for a closer look at the hardware and the performance of the unit.

 



domingo, 3 de março de 2013

Adjusting to Google Glass May Be Hard

URL: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/waiq7bjnORE/story01.htm


New submitter fluxgate writes "Steve Mann (whom you might know for his having pioneered wearable computing as a grad student at MIT back in the 1990s) writes in IEEE Spectrum magazine about his decades of experience with computerized eyeware. His article warns that Google Glass hasn't been properly engineered to avoid creating disorientating effects and significant eyestrain. While it's hard to imagine that Google has missed something fundamental here, Mann convincingly describes why Google Glass users might experience serious problems. Quoting: 'The very first wearable computer system I put together showed me real-time video on a helmet-mounted display. The camera was situated close to one eye, but it didn’t have quite the same viewpoint. The slight misalignment seemed unimportant at the time, but it produced some strange and unpleasant results. And those troubling effects persisted long after I took the gear off. That’s because my brain had adjusted to an unnatural view, so it took a while to readjust to normal vision. ... Google Glass and several similarly configured systems now in development suffer from another problem I learned about 30 years ago that arises from the basic asymmetry of their designs, in which the wearer views the display through only one eye. These systems all contain lenses that make the display appear to hover in space, farther away than it really is. That’s because the human eye can’t focus on something that’s only a couple of centimeters away, so an optical correction is needed. But what Google and other companies are doing—using fixed-focus lenses to make the display appear farther away—is not good.'"

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