Articles: CPU

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Archiving and Encryption

To test the processors performance during data archiving we resort to WinRAR archiving utility. Using maximum compression rate we archive a folder with multiple files 699 MB in total size.

Core i7-2600K and Core i7-990X Extreme Edition processors show very similar results in this test, although the LGA1366 processor is a little bit ahead of the competitor.

The processor performance during encryption is measured with an integrated benchmark from a popular cryptographic utility called TrueCrypt. I have to say that it can not only effectively utilize any number of processor cores, but also supports special AES instructions.

Encryption is a process that can be well paralleled, so six cores of the Gulftown processor, which also support AES instructions, show brilliant results. So, Core i7-2600K gets defeated not only by Core i7-990X Extreme Edition, but also by a slower six-core CPU – Core i7-970.

Image Editing

We measured the performance in Adobe Photoshop using our own benchmark made from Retouch Artists Photoshop Speed Test that has been creatively modified. It includes typical editing of four 10-megapixel images from a digital photo camera.

Not all the filters in Adobe Photoshop are well optimized for multi-threading. As a result, during complex image processing large number of computational cores doesn’t matter that much. So, the victory here goes to Sandy Bridge processors with advanced microarchitecture and higher relative performance, namely, Core i5-2500K and Core i7-2600K. As for Core i7-990X Extreme Edition, the performance difference between it and its vis-à-vis reaches impressive 10%.

We have also performed some tests in Adobe Photoshop Lightroom 3 program. The test scenario includes post-processing and export into JPEG format of a hundred 12-megapixel images in RAW format.

However, when it comes to batch image processing in Adobe Photoshop Lightroom, it creates completely different type of processor workload. Here Sandy Bridge microarchitecture loses to the pure computational power of six Gulftown cores. As a result, Core i7-990X Extreme Edition turns out 15% faster than Core i7-2600K.

Audio Processing

We use Apple iTunes utility to test audio transcoding speed. It transcodes the contents of a CD disk into AAC format. Note that the typical peculiarity of this utility is its ability to utilize only a pair of processor cores.

We knew the outcome of the audio transcoding test in iTunes even before we started it. The number of cores doesn’t matter here, it is the performance of a single core that does. And this is something Sandy Bridge processors are truly superior in. That is why quite naturally the top two lines on the chart are occupied by Core i5-2500K and Core i7-2600K.

The test in Cakewalk Sonar X1 measured the time it took to mix a short test track.

And again LGA1155 processors are the leaders. It is a pity that Sandy Bridge microarchitecture is not yet used in processors with more than four computational cores. But even without extra cores Core i7-2600K defeated all competitors, including Core i7-990X Extreme Edition, in most applications, including a few professional ones.

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