Compare 9 series cards for a 4k setup

4k gtx 9 series

GTX 970 (x3) - $1677
        Total Ram --- 12, Total Cores - 4992, Total GigaTexels/s - 327, Total Watts - 435
        (Scaled) --- GigaTexels/s - 250, GTS/Watt - 0.57, GTS/$ - 0.15
        Value Score --- 1.02

GTX 980 (x2) - $1558
        Total Ram --- 8, Total Cores - 4096, Total GigaTexels/s - 288, Total Watts - 330
        (Scaled) --- GigaTexels/s - 274, GTS/Watt - 0.83, GTS/$ - 0.18
        Value Score --- 1.16

GTX 980 Ti (x2) - $2198
        Total Ram --- 12, Total Cores - 5632, Total GigaTexels/s - 352, Total Watts - 500
        (Scaled) --- GigaTexels/s - 334, GTS/Watt - 0.67, GTS/$ - 0.15
        Value Score --- 1.22

GTX Titan X (x2) - $3058
        Total Ram --- 24, Total Cores - 6144, Total GigaTexels/s - 384, Total Watts - 500
        (Scaled) --- GigaTexels/s - 365, GTS/Watt - 0.73, GTS/$ - 0.12
        Value Score --- 2.09

cards.js

(function () {
  'use strict';

  function CardProfile(name, price, cores, baseClock, gts, ram, watts) {
    this.name = name;
    this.price = price;
    this.cores = cores;
    this.baseClock = baseClock;
    this.gts = gts;
    this.ram = ram;
    this.watts = watts;
  }

  function CardResult(cardProfile, noCards) {
    this.cardProfile = cardProfile;
    this.noCards = noCards;
  }

  CardResult.prototype = {
    getCost: function () {
      return this.getValue(this.cardProfile.price);
    },
    getWatts: function () {
      return this.getValue(this.cardProfile.watts);
    },
    getRam: function () {
      return this.getValue(this.cardProfile.ram);
    },
    getCores: function () {
      return this.getValue(this.cardProfile.cores);
    },
    getGts: function (scaling) {
      return this.getValue(this.cardProfile.gts, scaling);
    },
    getGtsPerWatt: function (scaling) {
      return this.getGts(scaling) / this.getWatts();//returns gts per watt - higher is better
    },
    getGtsPerDollar: function (scaling) {
      return this.getGts(scaling) / this.getCost();//returns gts per dollar - higher is better
    },
    getScore: function () {
      var gtsDollar = this.getGtsPerDollar(true);
      var gtsWatts = this.getGtsPerWatt(true);
      var ram = this.getRam(true);

      return gtsDollar * gtsWatts * ram;
    },
    getValue: function (value, scaled) {
      if (scaled) {
        var output = 0;
        for (var i = 1; i <= this.noCards; i++) {
          output += value * this.getCardNoModifier(i);
        }
        return output;
      }
      else {
        return this.noCards * value;
      }
    },
    getCardNoModifier: function (val) {
      switch (val) {
        case 1 : return 1;
        case 2 : return 0.9;
        case 3 : return 0.39
      }

      return 0;
    }
  }

  var gtx970 = {card: new CardProfile('GTX 970', 559, 1664, 1050, 109, 4, 145), amount: 3};
  var gtx980 = {card: new CardProfile('GTX 980', 779, 2048, 1126, 144, 4, 165), amount: 2};
  var gtx980ti = {card: new CardProfile('GTX 980 Ti', 1099, 2816, 1000, 176, 6, 250), amount: 2};
  var gtxTitanX = {card: new CardProfile('GTX Titan X', 1529, 3072, 1000, 192, 12, 250), amount: 2};
  var cards = [gtx970, gtx980, gtx980ti, gtxTitanX];

  for(var i = 0; i < cards.length; i++) {
    var data = new CardResult(cards[i].card, cards[i].amount);
    console.log('%s (x%d) - $%d', cards[i].card.name, cards[i].amount, data.getCost());
    console.log('\tTotal Ram --- %d, Total Cores - %d, Total GigaTexels/s - %d, Total Watts - %d', data.getRam(), data.getCores(), data.getGts(), data.getWatts());
    console.log('\t(Scaled) --- GigaTexels/s - %d, GTS/Watt - %d, GTS/$ - %d', Math.round(data.getGts(true)), (Math.round(data.getGtsPerWatt(true) * 100) / 100), (Math.round(data.getGtsPerDollar(true) * 100) / 100));
    console.log('\tValue Score --- %d\n', (Math.round(data.getScore() * 100) / 100));
  }
})();