Questioning @ any time,
Answering @ all times possible ;P

Yes (in some cases) and no: yes, because some games offer such great graphics (GTA IV, Max Payne 3) that it might come in handy! And for example: anti-aliasing (pixel rate usage ↑ → more color information = more data = more MBs); playing on full HD? → 2,073,600 pixels = more MBs needed. So when you're running (advanced) DX11 @ 1920 x 1080 and enjoying a lot of AA and for example AF, in some cases maybe > 2GB might be better........

....no because I would recommend max. 1.5GB cards (for gaming purposes) and for example in my case: 1440 x 900 resolution and still Windows XP (DX9), max. 1024MB...but I'm still fine with my 512MB VRAM :)

That's what I can say about it! Depending on how we interpret your question, there are different answers....but remember that a lot of marketing is used; often only the amount of VRAM is mentioned in an advertisement (?)

He saviour, great to have you 'here' ;) → Assuming that you've got a fitting and nice RAM configuration (4GB DDR3 1333MT/s....), you're running DX11 and that you want a setup with a good price/quality: for example the GTX 560 (or HD 5870 1024MB) should be enough for DX11 @ 1366 x 768 when you want to max. out most of the games of today (including average AA settings + advanced DX11 use) + a 2nd generation quad core i5-2300 :) Don't forget the PSU and realize following: when you for example get SO much FPS (without using V-sync or with...when your screen's refresh rate is like 100Hz), for example because your GFX can handle a certain game very well (too well...), it's possible that you put a lot more strain on the CPU than the GPU, because the CPU needs to be @ speed to produce a lot more frames ;) Then the i5-2300 is your assurance ;)

I've also noticed when I start up a game and it says "Press any key" I can't find the any key.

1st: the HD 7870 is a DirectX 11 level GPU which will support the most recent software version/APIs/features, sure :)
2nd: not much memory bandwidth in return? Then I think you meant the laptop versions from the 600 series? → the memory bandwidth is calculated by using the memory clock, bus width and type of RAM (multiplier); I see a lot of the laptop Keplers have a relatively low data bus width and some have GDDR3 memory ;)

Hey BilliTomoose, thanks for your question: the most important and specific funtion of cache memory is, that CPU request anticipation can be executed much better → Recently used data/instructions from main memory locations are stored in L1, L2 and in the meantime in most cases L3 cache; from there it can be accessed by the CPU for execution very faster (↓ latency) → total access time (in ms) = ↓ Is this clear?
Some facts:
1. L1 cache: next to the processor core and built in SRAM
2. L2 cache: close to the core and causes slowdowns due to refresh cycles (DRAM)
3. L3 cache: On the motherboard = much slower, but still much faster than system RAM/main memory
4. cache misses → L1 (no data/instructions? a miss = loss of efficiency) → L2 (No data/instructions?) → L3 (No data/instructions?) → main memory (final destination)
Enough? :)

*Edit*:
2. L2 cache:
3. L3 cache:

maybe 4 or 6 gb.... just like several years ago when minimum RAM is 512mb or 1gb

RAM is cheap ;)

Dude it is next to the F13 key! That's so easy to find ;)

Haha, thanks TM :) The 'any' key is here, you have lost it :P You can also press a-n-y at once :D I don't know about a 'F13' key either :D

As you know, it's my pleasure ;) Thanks too :) 9 hits and 0 questions is still ok to me, let's hope for some interesting stuff! M