diff --git a/GPU/GPUTracking/Definitions/GPUSettingsList.h b/GPU/GPUTracking/Definitions/GPUSettingsList.h
index 0ff8adb1cb957..51a0add7dbeea 100644
--- a/GPU/GPUTracking/Definitions/GPUSettingsList.h
+++ b/GPU/GPUTracking/Definitions/GPUSettingsList.h
@@ -512,6 +512,9 @@ AddOption(shipToQC, bool, false, "", 0, "Do not write output files but ship hist
 AddOption(shipToQCAsCanvas, bool, false, "", 0, "Send TCanvases with full layout to QC instead of individual histograms")
 AddOption(clusterRejectionHistograms, bool, false, "", 0, "Fill histograms with cluster rejection statistics")
 AddOption(histMaxNClusters, uint32_t, 500000000, "", 0, "Maximum number of clusters in rejection histograms")
+AddOption(minNClFindable, uint32_t, 70, "", 0, "Minimum number of (weighted) MC clusters for a track to count as findable")
+AddOption(minNClEff, uint32_t, 10, "", 0, "Minimum number of (weighted) MC clusters for a track to contribute to all-tracks efficiency histogramm")
+AddOption(minNClRes, uint32_t, 40, "", 0, "Minimum number of (weighted) MC clusters for a track to contribute to resolution histogram")
 AddShortcut("compare", 0, "--QAinput", "Compare QA histograms", "--qa", "--QAinputHistogramsOnly")
 AddHelp("help", 'h')
 EndConfig()
diff --git a/GPU/GPUTracking/qa/GPUQA.cxx b/GPU/GPUTracking/qa/GPUQA.cxx
index 6f640578a8804..2e9c3a1870385 100644
--- a/GPU/GPUTracking/qa/GPUQA.cxx
+++ b/GPU/GPUTracking/qa/GPUQA.cxx
@@ -158,15 +158,12 @@ static constexpr float PT_MAX = 20;
 static constexpr float ETA_MAX = 1.5;
 static constexpr float ETA_MAX2 = 0.9;
 
-static constexpr float MIN_WEIGHT_CLS = 40;
-static constexpr float FINDABLE_WEIGHT_CLS = 70;
-
 static constexpr bool CLUST_HIST_INT_SUM = false;
 
 static constexpr const int32_t COLORCOUNT = 12;
 
 static const constexpr char* EFF_TYPES[5] = {"Rec", "Clone", "Fake", "All", "RecAndClone"};
-static const constexpr char* FINDABLE_NAMES[2] = {"", "Findable"};
+static const constexpr char* FINDABLE_NAMES[2] = {"All", "Findable"};
 static const constexpr char* PRIM_NAMES[2] = {"Prim", "Sec"};
 static const constexpr char* PARAMETER_NAMES[5] = {"Y", "Z", "#Phi", "#lambda", "Relative #it{p}_{T}"};
 static const constexpr char* PARAMETER_NAMES_NATIVE[5] = {"Y", "Z", "sin(#Phi)", "tan(#lambda)", "q/#it{p}_{T} (curvature)"};
@@ -1185,10 +1182,10 @@ void GPUQA::RunQA(bool matchOnly, const std::vector<o2::tpc::TrackTPC>* tracksEx
           if (info.primDaughters) {
             continue;
           }
-          if (mc2.nWeightCls < MIN_WEIGHT_CLS) {
+          if (mc2.nWeightCls < mConfig.minNClEff) {
             continue;
           }
-          int32_t findable = mc2.nWeightCls >= FINDABLE_WEIGHT_CLS;
+          int32_t findable = mc2.nWeightCls >= mConfig.minNClFindable;
           if (info.pid < 0) {
             continue;
           }
@@ -1217,9 +1214,9 @@ void GPUQA::RunQA(bool matchOnly, const std::vector<o2::tpc::TrackTPC>* tracksEx
           float localY = -info.x * s + info.y * c;
 
           if (mConfig.dumpToROOT) {
-            static auto effdump = GPUROOTDump<TNtuple>::getNew("eff", "alpha:x:y:z:mcphi:mceta:mcpt:rec:fake:findable:prim");
+            static auto effdump = GPUROOTDump<TNtuple>::getNew("eff", "alpha:x:y:z:mcphi:mceta:mcpt:rec:fake:findable:prim:ncls");
             float localX = info.x * c + info.y * s;
-            effdump.Fill(alpha, localX, localY, info.z, mcphi, mceta, mcpt, mRecTracks[iCol][i], mFakeTracks[iCol][i], findable, info.prim);
+            effdump.Fill(alpha, localX, localY, info.z, mcphi, mceta, mcpt, mRecTracks[iCol][i], mFakeTracks[iCol][i], findable, info.prim, mc2.nWeightCls);
           }
 
           for (int32_t j = 0; j < 4; j++) {
@@ -1304,7 +1301,7 @@ void GPUQA::RunQA(bool matchOnly, const std::vector<o2::tpc::TrackTPC>* tracksEx
         if (mConfig.filterPID >= 0 && mc1.pid != mConfig.filterPID) {
           continue;
         }
-        if (mc2.nWeightCls < MIN_WEIGHT_CLS) {
+        if (mc2.nWeightCls < mConfig.minNClRes) {
           continue;
         }
         if (mConfig.resPrimaries == 1 && !mc1.prim) {