So to correct them in the fab, their degree of leakage are measured and corrective fuses are added to the GPU package, and correct VID set for the chip’s leakage characteristics. Some have higher electrical leakage, some have low. Not all GPUs are born equal, not even in the same wafer. Look at it this way, let’s say there’s an imperfect car manufacturing company, and not all the cars that come out of it have perfectly aligned and balanced wheels, and so to “increase yields”, the car maker puts its cars (at the factory), through corrective studs that will align/balance out wheels. MSI GeForce GTX 570 – ASIC quality: 136.0% – (user: R.I.P) GeForce GTX 465 – ASIC quality: 101.4% – (user: Voodootool)ĮVGA GeForce GTX 560 Ti – ASIC quality: 102.3% – (user: Woodz) So wait for the next versions of GPU-Z to see if values above 100% come from a simple bug or not…
#ASIC SCORE GPU Z UPDATE#
Update (2012.01.23): According to Geeks3D’s readers screenshots, the ASIC detection seems to have some problems: values can be greater than 100%. Here what AMD’s Dave Baumann says:Īctually, it does the opposite! We scale the voltage based on leakage, so the higher leakage parts use lower voltage and the lower leakage parts use a higher voltage – what this is does narrow the entire TDP range of the product.Įverything is qualified at worst case anyway all the TDP calcs and the fan settings are completed on the wors case for the product range. Update (2012.01.23): the ASIC quality detection is probably based on the GPU voltage. Then the question: how ASIC quality detection is done and, above all, is it reliable?Īnd you, what is the ASIC quality of your GPU? This test with two identical cards (MSI Cyclone) is interesting because it shows us that ASIC quality detection is not based on a database. As I said, finest GPUs are found in high-end graphics card (MSI’s Lightning: > 96%) while worst ones are found in entry level card (ASUS GT 520: 56%). MSI GeForce GTX 460 Cyclone (sample number two) – ASIC quality: 62.0%ĮVGA GeForce GTX 580 SC – ASIC quality: 60.0%ĪSUS GeForce GT 520 Silent – ASIC quality: 56.3%Īs you can see with MSI’s GTX 460 Cyclone samples, you can’t rely too much on ASIC quality to choose a graphics card because even on the same model of graphics card (here MSI GeForce GTX 460 Cyclone 768D5 OC), ASIC quality values can be quite different. MSI GeForce GTX 460 Cyclone (sample number one) – ASIC quality: 75.4% MSI GeForce GTX 470 – ASIC quality: 85.4% MSI GeForce GTX 580 Lightning – ASIC quality: 96.3%ĮVGA GeForce GTX 480 – ASIC quality: 88.6% Here are the ASIC qualities for some GeForce cards: The finest dies are reserved for ultra-high end cards (like MSI’s Lightning series, ASUS Matrix, EVGA Classified for example) while pieces of silicon with large amount of electrical leaks are found in entry level cards… The ASIC quality should allow to quickly know if a GPU is overclockable or not. Not all GPUs on a silicon wafer have the same quality, some dies are finer than other.
The latest GPU-Z 0.5.8 includes a new feature that displays the quality of the GPU ( ASIC quality) of recent graphics cards (GeForce GTX 400, GTX 500 and Radeon HD 7800, HD 7900 series).