AMD Radeon 6990m Showing 6970m

I bought it from ebay but the seller is telling me it shows 6970 but it has the 6990 and he sent me a gpu-z print screen with the 6990 gpu-clock and shader spec.
how van I be sure I have the 6990 because that's what I got that lap for ..

 

here's your solution:

Alienware M17x R3 & M18x: AMD 6970 and 6990 Show in Device Manager as AMD 6900 Series | Dell

 

If the 6990M is not from Dell (so part numbers won't apply), just check the number of Shaders reported by GPU-Z or similar utilities. The 6990M has 1120; the 6970 has 960. You can fake clocks, but you can't fake shaders.

 

Wrong, my 6970m in M17x R3 shows up as 1120 shaders, but its the Eurocom card, not Dell =)

 

The Eurocom cards you refer to (and some Chinese generic versions) are (ES) models which are actually 6990M's with 160 shaders locked out in the vbios. Those shaders can be unlocked and the card returned to 6990M status by reflashing the vbios. When that occurs, and the full 1120 shaders are accessible, you have a 6990M. I would have thought the supply of those cards would have been cleaned out by now.