Intel Core i7 Power Efficiency, Overclocking, and More Information

Intel has been well-deserving of respect in the PC hardware industry since the introduction of the first Core microarchitecture, and their new Nehalem (Core i7) processors continue the trend of high performance that Intel has established. The Core i7 processors are a significant release, especially important to those working in video editing, video encoding, and 3D rendering.

Intel Core i7 CPUIntel has been well-deserving of respect in the PC hardware industry since the introduction of the first Core microarchitecture, and their new Nehalem (Core i7) processors continue the trend of high performance that Intel has established.  The Core i7 processors are a significant release, especially important to those working in video editing, video encoding, and 3D rendering.  The new processor line definitely strengthens Intel’s reign over AMD even on the eve of AMD’s 45nm Phenom processor debut.

The Nehalem is a very power-efficient processor. Compared to earlier models, the Core i7 CPUs offer a 10-20% decrease in power consumption, quite a substantial amount.  No more than a year from now, Intel will also release the same architecture built on a 32nm, which should provide an even greater reduction in power consumption.   Nehalem also has great potential for notebooks PCs.

Initially, it was rumored that Intel had restricted the Core i7 processors in such a way that they could not be overclocked effectively due to the temperature, current power draw, and TDP evaluation of TURBO mode.  However, that did not turn out to be the case.  This limitation can simply be disabled via a motherboard BIOS option.   As for the actual overclocking, it’s a little different, but sometimes change can be a good thing.  Fortunately, the Core i7 overclocks just as well as its predecessor by increasing the BCLK (bus clock) or multiplier.

Like the Phenom, Intel’s Core i7 is sectioned into “core” and “uncore” areas. The core area includes the four processor cores and their L1 and L2 caches.  The uncore area contains the memory controller and shared L3 cache. The uncore runs at 2.66GHz for the Core i7-965 processor and 2.13GHz for the Core i7-940 and Core i7-920 processors.

As with the core clock, the uncore is set based on yield and performance targets. The uncore clock is governed by a basic multiplier of the BCLK (133MHz), which is 20x for the Core i7-965 and 16x for the Core i7-940 and Core i7-920. The uncore also uses a dedicated voltage (1.20V), which does not scale up/down.

Nehelam introduces many changes at once, including a static CMOS design, new power gate transistors, QPI, an integrated memory controller, Hyper Threading, and a couple other features and architectural tweaks. The only request we could ask would be 95W and 65W Nehalems to make this processor truly irresistible for everyone!

1 comment
Leave a Reply

Your email address will not be published.

You May Also Like
Read More

Logitech Z-500 Wireless Speakers

Most people use laptops to gain freedom from wires and portability. While it's true that everything is packed into a small, self-contained machine with a notebook, once you start connecting other devices, your battery life runs low, requiring the power cable, etc., sometimes it feels like we're back to square one. Logitech recently brought out its Z-500 speakers that help clear the clutter by providing wireless enhanced audio.
Read More

Transcend SATA-II 2.5″ SSD

Transcend recently released a 128GB MLC solid state drive (SSD). The Transcend drives offer 145MB/s read and 92MB/s write performance (sustained), which guarantees faster file transfers whether you're working with a 1GB or 100GB file size.
Read More

AeroCool AeroRacer Pro PC Case

The AeroCool AeroRacer Pro is an amazing-looking race car inspired PC case that offers serious built-in cooling. The AeroRacer Pro steel, mid-tower PC case features a huge 400-mm fan on the left side of the case, the largest commercial case fan in the world.
Read More

GPU Accelerated Computing

As most here will know, GPU is short for graphics processing unit, a piece of hardware that is dedicated to rendering graphics. Years ago, when the personal computer first found its way into homes, dedicated GPUs did not exist. All graphics were displayed and manipulated by the CPU (the central processing unit). As a result, only primitive images could be displayed, without performance issues. It wasn’t until the 1980s that the first dedicated GPU was invented.