Overclocking Results:

stock overclocked gpu speed: 750 mhz 830 mhz memory speed: (800) 3200 mhz (850) 3400 mhz if you're new to Overclocking and not sure what to do, check out these two excellent Guides for some pointers: Overclocking the CPU and Memory Overclocking the Videocard

The ASUS EAH4770 FML HTDI/512MD5/A videocard ships with its ATI 'RV740' GPU running at 750MHz and 512MB of GDDR5 memory clocked at a respectable 800MHz, or effective 3.2GHz (quad-pumped).

As always, PCSTATS overclocked the videocard through ATI's Catalyst Control Center using ATI Overdrive. The fan was set to run at 100% from the start and PCSTATS started with the GPU first, pausing to test the results with a quick 3D benchmark before continuing. We take note of any stability problems or artifacts, then list the maximum stable and artifact-free overclocked speed the videocard achieves. The same process is repeated with the memory, then both GPU and memory are overclocked together.

ASUS' EAH4770 FORMULA is a mainstream videocard, which generally means good overclocking is to come. Unfortunately the overclocking sliders in ATI Catalyst Control Center don't have all that much range... in fact the GPU could be overclocked to a maximum of just 830MHz.

Considering this, we didn't bother increasing the clock speed in small jumps, and instead went right for gold. The Radeon HD 4770 was pushed from its default of 750MHz right to 830MHz in one fell swoop. The graphics card handled this without breaking a sweat - no visible artifacts or instability.

The memory options were similarly limited by ATI Overdrive, so with the GPU back at stock speeds the 512MB of GDDR5 memory on the ASUS EAH4770 FORMULA was aggressively overclocked right to the max - 850MHz.