can anybody tell me what the difference is between these to card. I keep reading about "how" to unlock it but not much on why and what the benefit(besides the obvious financial aspect)
so you're saying, that as far as the hardware configurations goes, there are no differences, only that some of the shaders were disabled?Originally Posted by sexybastard;13100271
A 6950 is almost the exact same card as a 6970. The have the same PCB so there share all the same circuitry.
But AMD needed to differiante the cards so they simply disabled some shader units and lowered the clocks. But these changes were made to the bios so with a different bios you get back all the functionality of a 6970 for much cheaper.
Originally Posted by InterestedThirdParty
so you're saying, that as far as the hardware configurations goes, there are no differences, only that some of the shaders were disabled?
guess I'm going with two 6950s then
I'm fine with this - increasing the ram past 1350 does literally nothing for my framerates and almost nothing for benchmarks (which I have later realised is to do with ECCOriginally Posted by kidwolf909;13100384
I believe the RAM IC's on the 6970's are more capable/higher voltage than those on the 6950's.
Hence the plethora of people unable to hit 6970 memory clocks on their unlocked 6950's.
This is technically incorrect.Originally Posted by BradleyW;13100473
But..the 6950 2GB Ref is the bang same as the 6970. It is a 6970 with a different bios flashed. That's all!
+rep to you. This is EXACTLY what I observed when I was benchmarking with Heaven 2.5 (with tesselation normal though. I could comfortably go past 1400, but observer lower/no change in performance. So, dropped it down to 1350 (see sig rig) and was the sweet spot for me.Originally Posted by whybother;13100552
Almost no 6950 will run faster than 1375mhz without error correcting. Most benchmarks like 3dmark11 aren't affected by the error correcting, so many people wrongly assume their card runs fine as their score increases.
I've found Heaven with tessellation disabled is the bet way to determine error correction. However, when you get to a certain speed, you will begin to gain fps due to the raw power compensating for error correction.
For example (figures are not accurate and just for illustration):
1375mhz - 45fps
1400mhz - 43fps
1425mhz - 44fps
1450mhz - 45fps
1500mhz - 46fps
Except for the resistors and a change in where power is directed to, i believe the memory chips may also be just a better batch, high class of the same class if you get what i mean. Also, people who get lower fps with overclocked Vram, i've noticed this on many ati cards i've had in the past.