This is the FirePro V4900 graphics card. This PCI Express 2.0 graphics card has a full-height PCB (unlike the V3800) and its two-pin heatsink fan covers both the Turks core and the video memory. The fan is quiet during operation, even when running outside of a chassis.
The Turks GPU found on the AMD FirePro V4900 is clocked at 800MHz. For reference, the FirePro V4800 graphics core is clocked at 775MHz and its core is based upon a previous-generation (Evergreen) Redwood XT.
The FirePro V4900 has 1GB of GDDR5 video memory operating at 1000MHz and with a 128-bit interface and 64GB/s of bandwidth. The FirePro V4800 had 1GB of GDDR5 memory operating at 900MHz and bandwidth of 57.6GB/s.