Weird under-clocking framerates

[Guest]

I recently created an under clock profile in MSI Afterburner to keep my Sapphire Vapor-X HD 7950 cool and quiet when doing light tasks such as watching youtube.

My underclocked profile is as follows: 

Core voltage: 950 mV

Memory voltage: 1600 mV

Power limit -10%

Core clock: 475 MHz

Memory clock: 625 MHz

My overclocked profile is as follows:

Core voltage: 1181 mV

Memory voltage: 1600 mV

Power limit: +5%

Core clock: 1117 MHz

Memory clock: 1433 MHz

(My Overclock is quite low and looks weird but this is because it gives me an even Memory bandwidth number and Floating point performance number)

I ran Furmark for a good 5 minutes with the Underclocked settings and got a solid 43 FPS (min:43 max:43 avg:43) and very cool temps. 

I thought this was weird so I ran the test with my normal Overclocked speeds and got about 58 fps (min:47 max 78: avg: 58).

this is incredibly strange and I'm not sure if this is an error, any comments?

[GM_Peka]

That's pretty strange, you should monitor what actual frequency your card is running at while the program is running.