Graphics card question for Acer X1420G-U5832; is this a good upgrade?

I know I'm not the only one that's sought to upgrade this particular computer, having seen two previous threads here about the same computer and an upgrade involving a Sapphire ATI Radeon 5570 HD. I know that will work without much issue. However, I want to see if I can go further with the same minimalist upgrading. Because of this, I made an account here in hopes of getting some answers.

I am currently looking at this card, also from Sapphire. Only, this one's higher end, being a Radeon 6570 HD found here. For those curious about the 5570 HD, that's here. I have looked at its benchmarks and it looks promising, but I have two questions.

First, is this a sufficient upgrade compared to the HD 5570? It's only a few dollars difference, but I'm seeking the best performance that I can get without doing a ton of upgrades. Second, it looks like it'll fit (looking at the card, it seems to be a low profile, which is necessary), but if anyone has the same computer, perhaps one can be a better gauge of that? Thanks for any answers anyone can give.

That's kind of the issue. To clarify with the computer, it's a SFF model. So I don't know if I can go much higher. If I stick with Sapphire (and for that matter, Newegg), the best low-profile they seem to have available is the 6570, even on Sapphire's own website. For the $60-70 range, though, it might be worth the few extra dollars.

Also, those are the exact benchmarks I looked at beforehand. But I'll admit that others are more tech savvy than I am, so I felt asking here was still the best choice of action before putting my money where my mouth is.

EDIT: I don't have either card at present. If I did already have the 5570, then yeah, I'd be in agreement that it's not enough to warrant an upgrade. But I will keep looking. That's how I got this far.

Thanks, that's what I'm hoping. I'll be keeping this open if anyone has a better idea.

Okay, I have another question. I've managed to find a 2GB variant of the 6570. Now, I doubt an extra gig of VRAM will make that much of a difference and thus not be worth an additional $15-20 (I'm aiming for sub-$100, so options are still open), but would it use much more power than the 1GB card in my original post? Reviews are saying it'll work in as low as a 250W power supply, but as mine's a bit lower at 220W, I'd rather make sure beforehand.

If it helps, it's still a Sapphire card.

Save the money as the 6570 isn't fast enough to take advantage of the extra GB of memory.

I know, I know, this thread's a shade old now. However, I didn't mark it as solved just in case I still had questions and the thread didn't become too old. So, yeah, yet another question of sorts. Apparently, Sapphire has recently released a low-profile 6670 HD. From my understanding, this would be even better due to not only it being slightly higher end, but also a faster memory option (GDDR5; the 6570's only DDR3). It'll still fit within the price range I've aimed for, but I still have concerns for power draw. To compare, the 6570 uses 44W, its GDDR5 cousin uses 60W, and the 6670 uses 66W sll of these under typical load. Going by the review posted above, the total draw still falls just under 220W even on their test machines. My question, yet again, is this: is it enough of an upgrade to warrant a higher price ($35 more than the 6570, at $100). I'm currently leaning towards yes due to the faster memory it'd offer and having some extra oomph aside, but I'd also like to know if it's worth taking a chance due to the 50% increase in wattage. As always, any answers/opinions will be greatly appreciated.

One thing you have to remember is that that 220W power supply you have is not 220W on the 12V rail, but the combined total of all rails (3.3V, 5V and others). Without knowing the full specs of the power supply in that Acer, at a guess I would say you actually have less than 150W on the 12V rail (which is what the card runs on) which if you look here,

AMD Radeon HD 6670 1 GB Review - Page 20/26 | techPowerUp

they actually measure what the card draws instead of the system total wattage. They have the 6670 at 42W average, which when added to your CPU (which draws around 95W at load) doesn't leave a whole lot left for the rest of the components that require power.

I just did some quick checking, both on what the power supply is and its ratings. That can be found here. Unless I'm wrong in the calculations I did, you'd be about right; the maximum wattage for the 12V rail is 168 (14 Amps x 12 Volts). Which would leave only about 31W after both are considered, or 23W under peak load. If my monitor runs off the same rail, then that only leaves 10W for whatever else runs off that rail. Which is probably everything that isn't the HDD or disc drives, I'm guessing.