diff --git a/web/yaamp/core/backend/bench.php b/web/yaamp/core/backend/bench.php
index 6656baa..110d808 100644
--- a/web/yaamp/core/backend/bench.php
+++ b/web/yaamp/core/backend/bench.php
@@ -25,16 +25,30 @@ function BenchUpdateChips()
 		$dups = getdbocount('db_benchmarks', "vendorid=:vid AND client=:client AND os=:os AND driver=:drv AND throughput=:thr AND userid=:uid",
 			array(':vid'=>$bench->vendorid, ':client'=>$bench->client, ':os'=>$bench->os, ':drv'=>$bench->driver,':thr'=>$bench->throughput,':uid'=>$bench->userid)
 		);
-		if ($dups > 10) {
+		if ($dups > 10 || round($bench->khps,3) == 0) {
 			//debuglog("bench: {$bench->device} ignored ($dups records already present)");
 			$bench->delete();
 			continue;
 		}
 
 		$chip = getChipName($bench->attributes);
-		debuglog("bench: {$bench->device} ($chip)...");
 		if (!empty($chip) && $chip != '-') {
 			$bench->chip = $chip;
+			$rates = dborow("SELECT AVG(khps) AS avg, COUNT(id) as cnt FROM benchmarks WHERE algo=:algo AND chip=:chip",
+				array(':algo'=>$bench->algo, ':chip'=>$chip)
+			);
+			$avg = (double) $rates['avg'];
+			$cnt = intval($rates['cnt']);
+			if ($cnt > 250) {
+				$bench->delete();
+				continue;
+			} elseif ($cnt > 5 && $bench->khps < $avg / 2) {
+				$user = getdbo('db_accounts', $bench->userid);
+				debuglog("bench: {$bench->device} ignored, bad {$bench->algo} hashrate {$bench->khps} kHs by {$user->username}");
+				$bench->delete();
+				continue;
+			}
+			debuglog("bench: {$bench->device} ($chip)...");
 			$bench->save();
 		}
 	}
diff --git a/web/yaamp/modules/bench/functions.php b/web/yaamp/modules/bench/functions.php
index 3bda4d7..2681997 100644
--- a/web/yaamp/modules/bench/functions.php
+++ b/web/yaamp/modules/bench/functions.php
@@ -154,7 +154,7 @@ function getChipName($row)
 		if (strpos($device, 'AMD Athlon ')) {
 			return str_replace('AMD ', '', $device);
 		}
-		$device = preg_replace('/AMD (A6\-[1-9]+) APU .+/','\1', $device);
+		$device = preg_replace('/AMD (A6\-[1-9]+[KM]*) APU .+/','\1', $device);
 		$device = preg_replace('/AMD (E[\d]*\-[\d]+) APU .+/','\1', $device);
 		$device = preg_replace('/AMD (A[\d]+\-[\d]+[KP]*) Radeon .+/','\1', $device);
 		$words = explode(' ', $device);
@@ -174,7 +174,10 @@ function getChipName($row)
 			$chip = str_replace('GT ','', $chip);
 			$chip = str_replace('GTX ','', $chip);
 			$chip = str_replace('650 Ti BOOST','650 Ti', $chip);
+			$chip = str_replace('760 Ti OEM','760 Ti', $chip);
 			$chip = str_replace(' (Pascal)',' Pascal', $chip);
+			$chip = str_replace('Tesla P100-SXM2-16GB','Tesla P100', $chip);
+			$chip = str_replace('Tesla V100-SXM2-16GB','Tesla V100', $chip);
 			$chip = preg_replace('/ASUS ([6-9]\d\dM)/','\1', $chip); // ASUS 940M
 			$chip = preg_replace('/MSI ([6-9]\d\dM)/','\1', $chip); // MSI 840M
 			$chip = preg_replace('/MSI ([6-9]\d\dMX)/','\1', $chip); // MSI 940MX
@@ -183,6 +186,8 @@ function getChipName($row)
 			if (strpos($chip, 'P104-100') !== false || strpos($chip, 'CMP4-1') !== false)
 				$chip = 'P104-100';
 		}
+		// Quadro 600 - Quadro 2000
+		if (strstr($row['device'], 'Quadro') && !strstr($chip, 'Quadro')) $chip = "Quadro $chip";
 	}
 
 	return $chip;