Can i use gddr2 ram on my asus striker extreme mobo?

You mean DDR2, not GDDR2, right?

Just check your motherboard's memory compatibility specifications. If it supports DDR2-800, then you should be set to go.

i know it can use ddr2, but i have some actual GDDR2-800 ram. gddr2-800 1gb 128mx8 1.8v EP

Sorry, but I'm very sure that you're mistaken. I've seen some DDR2 sticks that were incorrectly called GDDR2, but I've never heard of a case of it being true. It wouldn't make any sense.

so the video cards that ive seen that say gddr2 is also mistaken too?

and i just looked up my gddr2 ram, it exists, and the only diff between them and reg ddr2 is that the gddr2's create more heat due to running at a higher clock rate.

GDDR2 on a video card would probably be a different technology from DDR2 (although it's not unlikely that many DDR2 cards are incorrectly referred to as GDDR2 and vice versa, the same happens with GDDR3/DDR3 and even GDDR5/DDR5 despite there not even being such a thing as DDR5).

On a graphics card, what you said is likely to be correct, but I have never heard of GDDR2 (which is a GPU-optimized memory interface) being used as a CPU's memory. Ehh, maybe I'm wrong about this, I'm just stating my experience.

I would like to see a link to these so called "GDDR2" modules.

GDDR is GPU VRAM only (always has been and always will be), so I really don't understand the confusion here or how GDDR anything could ever be mistaken for normal DDR RAM modules (since GDDR will always reside on a GPU).

OK, I just did a search for those exact modules and they appear to be for netbooks, and not for desktops, anyway (I still don't understand where they get off calling it GDDR2, but whatever).

Edit: I just saw a mention for a normal 240 pin version as well, but as far as knowing whether or not they're compatible with anything, your guess is as good as mine. I've never even heard of such a thing even existing until just now and it looks like only Elpida manufactures them (which makes me think something is WAY off somewhere).

There are many differences between DDR1/2/3/4 and GDDR2/3/5, here are a few of them:
1- GDDR tends to run at much higher frequencies, about twice that of similar generation DDR
2- GDDR has much higher latency, 3-6 cycles longer due to deeper pipelining in the row register multiplexer
3- GDDR has different clocking requirements than DDR
4- GDDR has different data strobe signaling from DDR

The last two make GDDR physically and electrically incompatible with DDR control circuitry. Since no standard CPU/NB memory controller was ever made to use GDDR AFAIK, there has never been such a thing as GDDR DIMMs in recent history. You have to go back in time about 12 years for the last consumer cards that had proprietary DP-RAM or GDDR DIMMs for aftermarket upgrade.

There has never been such a thing as standard GDDR1/2/3/5 DIMMs.

I think this is what he's talking about. http://www.ebay.com/itm/Elpida-1GB-Desktop-Ram-Card-GDD...

I think it really is just normal DDR2 RAM, but I don't know for absolute certain, so I'll reserve judgement.

Since the eBay descriptions say "desktop memory" but no desktop chipset or CPU I know of supports any form of GDDR memory, I would bet my shorts it is plain DDR2.