Which is better....?

The Athlon II X4 635 is the obvious choice out of the three you've mentioned.. 8600GT is not that powerful for any modern age game regardless of the game and/or resolution & settings.. Try to get an ATI HD 5770 1GB instead..

+1^
Between those,go with Athlon II X4 CPU.
And definitely change your VGA for gaming purposes.

X4 635, or even a 440 if budgets an issue,
Plus you wont need 6Gb, in any shape 6Gb is going to lose you your dual channel
better stick to 4gb imo and go for that Sapphire 5770  
Moto

X4 635 for me too.

But why 8600GT now? Its a waste!

What's your total budget for the GPU?

6GB as everyone said is useless. Most applications don't fully utilize 4GB at all. So you can stick to 4GB and spend the rest on the card.

for the gpu 800$ atm. and my gpu because its from my old pc and i didn't buy a new one

yea the video card could be better this is about the same maybe better newer version of the 9800gt for 50.00 after rebate
GALAXY NVIDIA GT240 512MB DDR5 PCI EXPRESS VIDEO CARD
http://www.frys.com/product/6219280?ref=dynamitedata.co...
http://forums.anandtech.com/showthread.php?t=2095361
let us know how much you want to spend we can recommend better suggestions?

$800 for the whole setup ? where are you going to buy online ? are you looking at a whole new $800 build

only for the card mate i get the cpu for free

which is the better cpu heres a good artical might help you decide
AMD's New Year Refresh: Athlon II X4 635, Phenom II X2 555, Athlon II X2 255 & Athlon II X3 440
http://www.anandtech.com/show/2923/1

by the way ( i know its a off-topic) how important is l3 cache because the athlon ain't got any.....

and what about a phenom Phenom II X4 925 vs Athlon II X4 635 is it much better?

L3 cache is important when it comes to gaming. If you are into gaming then i think the L3 cache would be handy and if you are looking at Phenoms then get a Phenom II 955 and get it over and done with.

In the post above you mentioned that $800 for the GPU? Is that true? You can get a HD5970 for that!

yeah. i don't want nvidia cards anymore ... i will get the best ati card for the money i have....

So is it $800 for the whole upgrade or just the GPU?

just the graphic card

ok guys i ordered the Phenom II X4 925 thank you for all your support  

Amazing!! $800 you can get:

HD5970
HD5850 1GB CF
And some HD 5870 CF as well.

GTX460 1GB SLI
GTX470 SLI
GTX480

With that budget you can get pretty much anything you want.

If you prefer a single card solution then the HD 5970 would certainly kill all competion. Otherwise i suggest the GTX470 SLI.

Also make sure you have a good PSU.

yes mate, i do prefer a single card   because i have only one pci express x16 slot .... and yes probably i will take the ati
HD5970

Wow that is so much money for a GPU setup... Why a cheap CPU? Shoulda just gone with the extra and went for the 955 =P A perfectly fine setup is 5850 CF, the reason being 5850's can actually be OC'd to the point of a 5870 stock. I have a single 5850 950/1205 and it runs at the same speed as a single 5870. So if your able to OC the 5850's to around 900/1XXX you'll be able to save 200$ and in essence have 5870 CF.

Also, just for your future reference for L3 Cache. It isnt THAT important for even gaming. The difference is probably only 2-5 fps, which isn't a huge difference.
http://www.tomshardware.com/reviews/athlon-l3-cache,241...

thanks for the link mate, great info.  

5970 is a great card but what resolution do you play at ?

1920x1080

5970 would still be a dual card setup.. Better go for the GTX 480.. Pair it up with a powerful CPU though to avoid any bottlenecks..

O.o no..... he already bought his CPU... Plus he could just OC to avoid bottlenecks...

for your info i didn't buy it .... i could send it back when it arrives get my money back and order a new one... simple

Ohhh, Ok. Well If you could just take like a small portion like 30$ more and you could get a 955. More like 20ish$. The 955 has the unlocked multi so you'll be able to OC further that way it'll decrease the likeliness of a bottleneck if you get the 5970. Higher clock speed = less bottle neck (usually thats the case) Plus the 955 could easily get to 3.9-4.0ghz on air. Say like a Hyper 212+, which cools great and it's only 20 sum dollars. Don't get the 212+ on newegg its double from any other store.

i cannot support the 955 black edition.... and i cannot find the 95w one in my country   (not from USA) ... i would import it but its freakin' expensive...
highest i can go is 945 ..... ;(

OH ok, the 945 is alright, it's not to shabby. I'm sure you'll be able to hit like 3.9 or 3.8