The Force10 S60 is a top of rack switch designed with truely deep buffers that specifically addresses the congestion management requirement that derives from a downward speed step. Buffer tuning is at the back of the command reference manual. Controls that limit the maximum queue depth can be adjusted. After all, 1.25 GBytes is a lot of buffer.
The Gig-E ports present at 44 RJ45 tw-pair and 4 SFPs. This may be in deference to the top-of-rack application. 44 Rack Units is a full 7 ft cabinet. The SFP+ ports are purchased two at a time as uplink modules.