Is this a good PC build?

Chieftec is a decent enough PSU, I don't really see why you'd bother swapping it out.

It would be much wiser to invest in an extra 2-4GB of RAM rather than replacing that Chieftec power supply. The CPU is still quite capable; just overclock it if the motherboard allows. You could easily hit 3.6 GHz with a 400 FSB.
And you absolutely need an SSD or a modern HDD. Those old 80GB drives are painfully slow. If you grab a newer 1TB drive, you will notice a massive improvement in overall system responsiveness.

Regarding the graphics card, that AMD Radeon R7 260x that crimsonstag84 linked would be a perfect match for the Intel Core 2 duo E8400.

Well, I’ve reached a bit of a crossroads here—I know for certain that I need to pick up a new graphics card and a hard drive, but the decisions are starting to pile up. As for the HDD, I don't really have any need for a massive 1TB drive; something in the 160GB or 320GB range would be plenty for what I'm doing. My main concern, though, is whether this power supply can actually handle pulling enough juice for that AMD Radeon R7 260x!

darkbadger12 said:So, I'm at a bit of a crossroads now—I definitely need to pick up a GPU and an HDD. But which drive should I go for? I don't really need a massive 1TB; maybe something around 160GB or 320GB would suffice. Also, I'm a little worried—will this power supply actually be able to handle that R7 260x card?

Sapphire Radeon R7 260x OC Graphics Card, 2GB GDDR5, DVI, DP, HDMI 11222-06-20G
HDD Desktop Toshiba DT01ACA050 (3.5", 500GB, 32MB, SATA III-600)
XFX Pro Series CoreEdition 80 450W PSU, XFX-P1-450S-X2B9

$544 Centro.hr

Honestly, it’s a bit silly to settle for a 320GB drive when you can usually snag a 500GB one for just a few extra bucks... and as for the power supply? Don't sweat it—it'll handle that setup without breaking a sweat.

He shouldn't need a new PSU since the AMD Radeon R7 260x actually draws less power than an old HD 3870X2.

Well, if you want my two cents—you might as well just take crimsonstag84’s advice and ditch the power supply altogether... I mean, you'll certainly save yourself about $150
!

It draws half as much power, maybe even three times less. 😬

If 500 GB is enough for you, go with this one:
It's the cheapest drive available, so there's really no point in getting anything smaller.

I think it’ll perform decently enough, but let's not get ahead of ourselves here.
Especially when you consider an eighth-gen setup.
It’s not like you have your i5, so don't expect to be hitting 300 fps at 1024x768. With a processor like this, the performance gains are pretty marginal once you start dropping the resolution and settings. That said, it’s still a solid, reliable CPU recommendation. I was actually just looking at a comparison between an AMD FX-8320 and an Intel Core i5-3570, where both maintained a decent average fps, but the FX had much more frequent, massive frame drops. Now, we can only imagine how that compares to some ancient 775 socket chip. It’ll probably pin your GPU at 100% load one second and then tank it down below 50% the next.
Well, you get what you pay for, I suppose.

darkbadger12 said:I'm stuck. I definitely need to buy a GPU and an HDD. But which drive should I grab? I don't need a massive 1TB; maybe just 160GB or 320GB. Also, will this power supply actually handle that R7 260x card?

It'll handle it. That card pulls less juice than your old one.
Just get the 260x and the HDD and call it a day.

I’m definitely going with the 260x and the 500GB HDD! I'll try running everything on this current power supply first—if it struggles to keep up, I'll just pick up a new one later. But if it handles the load without any issues, then honestly, that's a win.

Lol, it’s gotta run better when it’s pulling in almost half the power...
Make sure you account for the GPU, the drive, and the RAM too.