benchmarking Slowly Decreasing Firestrike results

[cooky560 Veteran]

Basically I fitted a new graphics card into my lan party going machine and since then I've noticed a steady decline in my benchmark scores. 

 

Before each test I restarted the machine and waited 2 minutes to allow it to finish booting.

 

My scores since I purchased the upgrade have been as follows:

 

On day of purchase: 7100

 

Test 1: 7060

Test 2: 7053

Test 3: 7048

Test 4: 7035

Test 5: 7029

 

I'm scared to run any more since I might be killing my graphics card, any ideas on what is happening?

 

Build

Intel i5 4670k 3.4ghz stock clock 

8GB Ram

Gigabyte Windforce 3x oc Geforce GTX 770 4gb on factory clock of 1187 mhz plus nvidia boost

Gigabyte Z87-HD3 Motherboard

Corsair GS600 600 psu