Category: Analysis

MSI officially about RTX 4070 Ti Super 16G Ventus 3X faults

Analysis, Graphics, News | | Ľubomír Samák

MSI has released a statement saying that the RTX 4070 Ti Ventus 3X graphics cards did indeed come out with an untweaked BIOS that prevents this graphics card from achieving its maximum performance. However, there seems to be a fix already that could solve everything. Still… let’s revisit this topic and try to sort through the possible technical reasons that cause the significant fluctuation in the performance of the cheapest three-fan MSI RTX 4070 Ti Super. Read more “MSI officially about RTX 4070 Ti Super 16G Ventus 3X faults” »

How we measured computer PSUs. The acoustic part

Analysis, PSUs | | Ľubomír Samák

The PSU tests, which will be published shortly, will also include a detailed noise analysis. Each model has a different fan, a different grille in front of it, and operates at a different speed under the same loads, all of which shapes the different noise character. In order to make everything clear and accurate, spectral analysis of the sound is essential. This tells us which frequencies are noisier and how each PSU actually “sounds”. Read more “How we measured computer PSUs. The acoustic part” »

How we measured computer PSUs. The electrical part

Analysis, PSUs | | Ľubomír Samák

The time has come to introduce the testing methodology for computer PSUs. We will divide this into two articles, where the first will cover procedures for obtaining key electrical quantities (i.e. surrounding efficiency, voltage regulation, voltage ripple, etc.). A separate sequel will then focus on the analysis of acoustic profiles. But now on to the purpose for which we travelled to the external testlab. Read more “How we measured computer PSUs. The electrical part” »

Why ATX 3.0? Features and advantages of the new PSU standard

Analysis, PSUs | | Jan Olšan

We are currently working on a series of power supply tests, from which you already saw a preview with thermal imagery and temperature measurements of the 12pin (a.k.a. 12+4pin) 12VHPWR cables. In this article we will look at what the PSUs produced using this standard have to offer. Even older good quality PSUs can last a long time in several generations of your PC, so what in the ATX 3.0 specification makes it worth switching over? Read more “Why ATX 3.0? Features and advantages of the new PSU standard” »

What does GeForce RTX accelerate in DaVinci Resolve Studio 18?

Analysis, Graphics | | Ľubomír Samák

DaVinci Resolve (Studio) video editing applications are highly optimized for hardware acceleration by GeForce RTX graphics cards. These can dramatically reduce the time of some tasks, turning hours into minutes or, for larger projects, days into hours. We’ll take a look at what exactly this is about in a two-part miniseries dedicated to streamlining work in Black Magic Studio video editors with NVIDIA Ada Lovelace GPUs. Read more “What does GeForce RTX accelerate in DaVinci Resolve Studio 18?” »

Why want a GeForce RTX 4000? Nvidia DLSS 3.5 technology analysis

Analysis, Extra tests, Graphics | | Jan Olšan

In this article, we’ll take a look at some of the exclusive technologies that Nvidia GeForce RTX 4000 generation graphics cards can provide. We are going to explain the most significant new features currently supported by the GeForce graphics card ecosystem and perform tests showing how they affect performance in Cyberpunk 2077 with the new Phantom Liberty expansion. And we’ll also take a look at what they’re doing to image quality. Read more “Why want a GeForce RTX 4000? Nvidia DLSS 3.5 technology analysis” »

Analysis: The main reasons why fans vibrate

Analysis, Fans | | Ľubomír Samák

We pay close attention to fan vibration in our tests, as it clearly indicates the mechanical qualities of the design. However, it is always good to have an idea why some fans vibrate more, others less, some not at all. And we will deal with this in more detail in this article, which is based on our own experience, but also on notes from fan developers. Can a cheap fan reach high speeds without vibration? Read more “Analysis: The main reasons why fans vibrate” »

AVX10 seeks to replace AVX-512, will work on big.LITTLE CPUs

Analysis, News, Processors | | Jan Olšan

Yesterday we reported that x86 processors – at least those from Intel – will get Advanced Performance Extensions (APX), a major change in the programming of these CPUs. But Intel is also planning big changes to SIMD instructions with AVX10 technology, which will unify vector extensions whose subsets are now a mess, and should also address the problem of big.LITTLE processors. But this may in turn kill the true 512-bit SIMD capability of AVX-512. Read more “AVX10 seeks to replace AVX-512, will work on big.LITTLE CPUs” »

Dynamic pressure. How does it relate to other fan parameters?

Analysis, Fans | | Ľubomír Samák

Pressure here, pressure there. Omitting the adjective and not clearly specifying what type of pressure is being referred to can lead to all sorts of misunderstandings. Especially when in fan terminology, the word pressure is usually associated with static pressure. Not infrequently, however, dynamic or total pressure is meant. Complicated? Not really, you just need to be clear about what is being talked about and learn to read between the lines a bit. Read more “Dynamic pressure. How does it relate to other fan parameters?” »

Totally simply: What is fan static pressure and what does it say?

Analysis, Fans | | Ľubomír Samák

A trivial topic for some, for others something they didn’t understand as well as they should have. This is also indicated by various activities on discussion forums, including posts like “airflow is irrelevant, you mainly need high static pressure on a radiator”, which somewhat points to a connection of wrong contexts. In this article we will discuss very simply, with examples, what static pressure is and how to grasp it correctly. Read more “Totally simply: What is fan static pressure and what does it say?” »

big.LITTLE by AMD: Zen 4c has the same IPC as the big Zen 4

Analysis, News, Processors | | Jan Olšan

After Intel’s hybrid CPUs, AMD is preparing its own big.LITTLE scheme that uses a mix of Zen 4 cores and a new Zen 4c variant that will be used in servers but also in laptops. However Zen4c is and at the same time is not a little core. While having much smaller footprint, it is said to be fully architecturally equivalent to the large core, including (almost?) the same performance per 1 MHz. The only little thing about it is clock speed. Read more “big.LITTLE by AMD: Zen 4c has the same IPC as the big Zen 4” »

ARM unveils record-breaking Cortex-X4 core with eight ALUs

Analysis, News, Processors | | Jan Olšan

ARM has been releasing a new generation of processor cores every year lately. This year will be no different (except for the Computex timing). ARM has unveiled a complete line of new architectures: a new Cortex-X4 “prime” big core for maximum single-threaded performance, a new medium Cortex-A720 core whose role is to provide multi-threaded performance (like Intel’s E-Core), and finally a new low-power Cortex-A520 little core. Read more “ARM unveils record-breaking Cortex-X4 core with eight ALUs” »

RDNA 3 the same as RDNA 2? Wrong, computational tests show

Analysis, Graphics | | Jan Olšan

We’re still in the process of finishing our review of the Radeon RX 7600 (the Pulse model by Sapphire), but we made a little preview, looking at a subset of tests that might go unnoticed in the final review: compute applications benchmarks. Why? The card seems to show better than typical performance gains in them. We’ve seen opinions stating that Navi 33 GPU bingst nothing new versus the Navi 23 chip, but these results say otherwise. Read more “RDNA 3 the same as RDNA 2? Wrong, computational tests show” »

Analysis: RGB LED implementation changes fan noise

Analysis, Cooling, Fans | | Ľubomír Samák

The headline may sound strange, but after reading the article it will make sense. After modifying a fan from unlit to lit, its noise level can change for a very simple reason. This is true even if the shape of the rotor or the operating speed has been maintained. As far as noise is concerned, a change by integrating ARGB LEDs does not always lead to a worse result. Still, it is important to know why any differences occur in the first place. Read more “Analysis: RGB LED implementation changes fan noise” »

Removing notches on fan blades? Sometimes a mistake

Analysis, Cooling, Fans | | Ľubomír Samák

On edges of blades of some fans there are small notches forming a kind of teeth, typically on the trailing edges, closer to the motor. These elements serve to break up tonal peaks, and it’s curious that manufacturers are abandoning them rather than adding them. In some designs, however, such a modification can be seen as a backwards move; elsewhere it’s an understandable one. We have a few examples for you. Read more “Removing notches on fan blades? Sometimes a mistake” »

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