Overclocking

Lucky for me we already had a copy of EVGA’s Precision X software when I put the GTX 770 to the test or I wouldn't have had much luck. EVGA has put a lot of time into fine tuning their software over the years to make it simple and easy to use when overclocking or just watching your cards performance. It is so easy in fact that my wife has been using it for some time with her GTX 580 Classified and now for a short period of time with her new GTX 770 ;). It was great to see that it was easy enough for her to jump in and toy around with it while having no experience at all.

Moving on to our overclock testing I took the same approach that I normally would and the same approach that I used on the GTX 770 reference card. I start with testing out GPU clock speeds and then move on to Memory, once I have the best possible speeds I toy around with combining them and see how it all works. I have put together a spreadsheet with my overclocking experience below. To initially test my overclocks I use test 2 on 3DMark 11 set to performance settings, there are more demanding tests out there but I have found this one to be similar to a lot of games in load.

GPU Clock Speed Overclocking

GPU Clock Speed Offset

Pass/Fail

Resulting GPU Speed

FPS Result

Notes

103Mhz

Pass

1346Mhz

54.69

 

155Mhz

Fail

1333Mhz

N/A

 

135Mhz

Fail

1320Mhz

N/A

 

122Mhz

Fail

1320Mhz

N/A

 

107Mhz

Fail

1306Mhz

N/A

 

105Mhz

Pass

1306Mhz

55.07

 

106Mhz

Pass

1306Mhz

55.07

 

107Mhz

Pass

1306Mhz

55.10

 

117MhZ

Pass

1306Mhz

55.04

 

117Mhz

Fail

1306Mhz

N/A

Added voltage

 

Memory Clock Offset Overclocking

Memory Clock Speed Offset

Pass/Fail

Resulting Memory Speed

FPS Result

Notes

400Mhz

Pass

3903Mhz

51.63

 

500Mhz

Pass

4001Mhz

51.73

 

550Mhz

Pass

4059Mhz

51.76

 

575MhZ

Pass

4082Mhz

51.80

1 Artifact

600MhZ

Pass

4104Mhz

51.81

1 Artifact

625Mhz

Pass

4131Mhz

51.83

30+ Artifacts

 

Combined GPU and Memory overclocks together

GPU Offset

Memory Offset

Pass Fail

FPS Result

Notes

117MHZ

600MHz

Pass

55.92

5 Artifacts

This time around the GTX 770 acted a little more erratic when overclocking the GPU. A good example of this was adding voltage to a known good clock killing it. When you figure in the overclock on this card already my results were fairly close though, the reference card was able to do 1320Mhz while this card hit 1306Mhz and wouldn't go a click over it. On the memory side of things I was once again very impressed with the clocks I was able to get with this card. I even pulled a little more than I could on the reference design. I settled on the same 4104Mhz or 8208Mhz effective clock speed on both the reference and EVGA cards but I found the EVGA card to be much more stable at that clock, this might be related to its additional cooling.

 

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garfi3ld's Avatar
garfi3ld replied the topic: #31187 30 May 2013 20:09
The second review for today is a second GTX 770, this time around with EVGA's new ACX cooling. Check out the review to find out how the additional cooling performed.
Deb0's Avatar
Deb0 replied the topic: #31188 30 May 2013 20:30
For all the futuristic looks of the nVidia style cards I like how the EVGA is keeping it classic sexy.

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