1) What's your overall budget? That would allow me to suggest better parts.
2) Not sure if that RAM will work with that motherboard - I had an Asus M87XXX series - it did not like Corsair XMS RAM - after the board failed on me I later found upping the voltage on the RAM from 1.35V to 1.5V is what did it.
Plus if you're going AMD I'd suggest 990FX or not at all - the 990FX is a great chipset, but most of their older platforms are getting really old and outdated, and the Intel P67, Z68 and H61 chipsets are all infinitely better. I'm not gonna say AMD platforms are useless - where they really excel where Intel doesn't are in the ability to use peripherals better and the ability to use graphics card lanes better. If in the future you wanted to do an SLI setup the 990FX makes far better use of multiple graphics cards than SB does. You might want to read this before deciding:
Definitely an improvement - the Sabertooth 990 is a solid board, I've been looking at getting one myself, but I'll probably wind up going with the Gigabyte 990FXA-UD5. You'll have to double check and make sure that the RAM is compatible before you buy. From my experience - AMD motherboards do NOT like certain makes and models of RAM, unlike their Intel counterparts.
I would recommend looking at getting a better case - not to say the one you've chosen is bad but what you want to look out for is cable management. The cheaper cases don't usually offer that feature compared to the more expensive cases on the market.
1. What's your overall budget? Post according to this thread if you will. I'll definitely go with a cheaper board and a faster gfx card. Will make your gaming experience better by a long way (Provided of course you're looking for a gaming rig). Also, no mention of the PSU. Any case, post according to the link. I'll see if I can come up with something better.
3. You should definitely get a faster HDD. That one's a 5400RPM "green" energy saving laptop drive if you will. When the world is shifting towards super fast SSD's, the least you can do is to get a 7200 RPM standard drive. Will be more expensive, but definitely worth it.
No, it's not bad, it's just redundant. The money could be better spend elsewhere.
BTW, it is bad to get a get a PSU that cannot deliver the specified voltage, but I'm sure you meant wattage
What's your primary requirement? If it's for general usage you can drop down the GPU and the PSU. If it's for gaming though, you'll do well to get a slightly beefier GPU especially for higher resolution monitors. Getting a cheaper board will help you do that.
PSU: £63 Seasonic Bronze S12II-520 - High quality PSU manufacturer. Not really sure about Powercool though - couldn't find any reviews on any of the major sites.
Case: £33 Your link.
Total: £581 Plus shipping (If any). Actually now that I have added it up, looks like you can even keep your Sabertooth if you want. The Gigabyte can accommodate 32nm 95watt 8 core chips. But doesn't support USB 3 and SATA 6Gb/s. So if you think you can afford it, go right ahead
Is the sabertooth motherboard considerably better than the gigabyte that you linked, or would I be better off saving the money. I am not building it solely for gaming but would like it to cope well when playing demanding games. I think I might keep the graphics card I originally linked purely for price reasons. Also, I have found this CPU, is it better than the one from above or should I stick with the one from above.
Stay away from the bulldozers from now. The Phenom II quads are faster per mhz.
The Sabertooth does have multiple SATA 6Gb/s, USB 3, SLI compliant, more overclocking features and better VRM cooling. If you're looking to keep your rig for any more than 2 yrs or planning to get a SATA 6Gb/s SSD in the meantime, or indeed wring out the last possible Mhz from your chip, I'll say you're better off with the Asus board.
As for your original post, I'll swap the board out (older socket), get 8GB RAM for £5-6 extra and get a faster HDD (though smaller). The GPU (GTX 460) is a tad 50:50. It's a great card, but newer, more efficient options are available.
Your second build looks better, but the Powercool PSU, I'm not really sure 'bout. Couldn't find any mention of it anywhere on the major sites. But if it is a well known and respected brand across the pond, might as well go with it.