Ich glaube, ich kann fast haben Sie es.... Also, multiplizieren wir die "generator256" durch das "Geheimnis" und das "Geheimnis" ist einfach nur der private Schlüssel. Aber ich habe das verloren, was passiert in "CurveFp curve256 = new CurveFp(p,a,b);. Was geschieht, um diese zahlen gleich der "curve256" und was geschieht dann mit, dass zu schaffen "generator256"?Dann, wie ist pubkeypoint aufgebrochen geben Sie die x-und y-Wert?nicht der Multiplikation der gnerator256 und das Geheimnis einfach das Ergebnis in eine Zahl, wo die erste Hälfte ist der x-Punkt und in der zweiten Hälfte ist der Punkt y auf dem Graphen? (btw, ich glaube, ein Großteil des Codes funktioniert nicht, hab ich Recht?)

Zusammenfassung: die unterschiedliche Herangehensweise an die Berechnungen. Nvidia-GPUs wie CPUs, in das Sie nur wenige Prozessoren, die Arbeit zu tun, aber schneller. ATI GPUs haben langsamere Prozessoren, aber viel mehr von Ihnen.

Sie finden eine vollständige Beschreibung auf der entsprechenden wiki-Seite :

Erstens, AMD-designs GPUs mit vielen einfachen ALUs/Shader (VLIW-design), die eine relativ niedrige Frequenz Uhr (in der Regel 1120-3200 ALUs auf 625-900 MHz), in der Erwägung, dass der Nvidia-Mikroarchitektur besteht aus weniger komplexeren ALUs und versucht, zu kompensieren, mit einer höheren shader-clock (in der Regel 448-1024 ALUs auf 1150-1544 MHz). Weil dieses VLIW vs. non-VLIW Unterschied, Nvidia verbraucht mehr Quadratmillimeter die-Fläche pro ALU, daher packen kann weniger von Ihnen pro chip, und treffen Sie die Frequenz Wand früher als AMD, die verhindert, dass Sie die Erhöhung der Takt hoch genug zu erreichen oder zu übertreffen, die AMD ' s performance. Dies führt zu einer raw-ALU performance-Vorteil für AMD:

AMD Radeon HD 6990: 3072 ALUs x 830 MHz = 2550 Milliarden 32-bit-Instruktion pro Sekunde
Nvidia GTX 590: 1024 ALUs x 1214 MHz = 1243 Milliarden 32-bit-Instruktion pro Sekunde 

Diese Ungefähre 2x-3x performance-Unterschied über die gesamte Bandbreite von AMD-und Nvidia-Grafikkarten. Es ist sehr sichtbar in allen ALU-gebunden GPGPU-Arbeitslasten wie Bitcoin, Passwort bruteforcers, etc.

Zweitens, ein weiterer Unterschied zugunsten Bitcoin-mining auf AMD-GPUs anstelle von Nvidia ist, dass der mining-Algorithmus basiert auf SHA-256, was macht starken Gebrauch von der 32-bit-Ganzzahl rechts drehen-Betrieb. Diese Funktion kann implementiert werden als eine einzelne hardware-Anleitung auf AMD-GPUs (BIT_ALIGN_INT), aber erfordert drei separate hardware-Anweisungen emuliert werden, die auf Nvidia-GPUs (2 Schichten + 1 hinzufügen). Dies allein gibt AMD einen anderen 1.7 x performance-Vorteil (~1900 Anweisungen anstelle von ~3250 ausführen der SHA-256-Komprimierung-Funktion).

Zusammen, diese 2 Faktoren machen die AMD-GPUs insgesamt 3x-5x schneller als das mining von Bitcoins.

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