Intel Core i7-975 Extreme

Core i7-975 ExtremeSpecs: Socket LGA-1366; Core clock: 3.33GHz; 32KB data/instruction cache per core; L2 cache: 256KB per core; L3 cache: 8MB shared; 130W TDP.Test system specs: Motherboard: Asus Rampage II Extreme; Memory: 6GB Corsair DDR3-1600; Graphics: Zotac GeForce GTX 260 Core 216; HDD: 300GB WD VelociRaptor

Intel has held the performance crown for more than three years—ever since the launch of its Core 2 microarchitecture. It goes without saying that the company doesn’t need to introduce a new flagship just to one-up itself. And yet Intel is yanking the cover from a fresh Core i7 CPU: the 975 Extreme.

Although it runs a scant 133MHz faster than its predecessor, we’re hardly able to complain, as this processor costs just as much as the one it replaces. As with the 965 Extreme, Intel’s latest iteration boasts four cores armed with Hyper-Threading. Its QuickPath Interconnect operates at 6.4 GT/s. And the processor’s triple-channel integrated memory controller supports up to DDR3-1066 speeds (officially). Of course, most motherboards expose additional multipliers to push RAM significantly faster, and we were able to get our test platform cruising at DDR3-2133 as part of our overclocking gauntlet. The processor itself topped out at 4.12GHz via a 31X multiplier, standard 133MHz BCLK, and 1.38V.

Performance using those overclocked settings is naturally unrivaled. Even at stock settings, however, our benchmark results are impressive. As we’d expect given Core i7’s established track record in A/V software, DivX and Xvid encoding is lightning-fast. And because WinRAR is optimized to take advantage of threading, it’s able to compress our test archive using all eight of Core i7’s logical cores.

At the end of the day, we appreciate a 3.33GHz processor at the same price as Intel’s former flagship. But at $999, “value” is most definitely a relative term. The 2.66GHz Core i7-920 is still an undeniable favorite. After all, most of the samples we’ve seen are good for 4GHz, so long as you’re willing to overclock. Without question, that’s the route we’d take in building a brand new Core i7-based machine

Paul Cross, ComputerPowerUser

Clear DNS Cache

Windows XP/Vista store the DNS information of Web sites you’ve visited, to reach those sites faster each time you access them. The cache sometimes gets corrupted or stores a lot of unusable data, and that leads to slower Internet response times. To clear the cache, go to the command prompt and type ipconfig /flushdns. The command purges the DNS cache and restores your Internet access speed.

Mario Morejon, PCMag

Give Your Laptop Battery a Longer Lease on Life

Does your laptop spend more time on your desk than your lap? If so, you’re probably causing your battery to wear out much sooner than it needs to.

See, it’s a sad (and expensive) fact of life: You’re lucky to get 18-24 months from a battery before it loses a good chunk of its charge capacity (meaning it no longer powers your laptop for as long as it used to).

And you’re accelerating this unfortunate timeframe if you leave your laptop plugged in 24/7, which is common for most folks who work at a desk. Because the battery rarely (if ever) gets a chance to discharge, it loses its capacity to hold a charge.

The simple solution: Pull the battery out of the laptop and leave it out when you’re deskbound. Most laptops can run on straight AC power, so there’s no need for the battery. And it’s easy enough to pop back in when you hit the road (though obviously you’ll want to make sure it’s charged, so plan ahead a bit).

It’s a hassle, sure, but consider the price of a replacement battery: usually $100 or more. What’s more, old, discarded batteries wreak havoc on landfills. Sooner or later, they’ll leak acid into the ground. So it’s in your best interests to keep your battery as long as possible, and to keep it from dying a premature death.

Rick Broida, PCWorld