I checked this on a few of those game requirement check sites and it seemed to give me the OK, but i'd like a second opinion. Here are my specs:

Intel Core 2 Duo E7300 2.66 GHz
3 GB RAM
ATI Radeon HD 3450 (512 MB)
Windows XP Pro 32 Bit Service Pack 3

I know it's not a great PC, but I thought I might give it a try if anyone thinks I can run it, though if it's going to run at a slow crawling frame rate then I won't waste my time downloading it when it comes to GOG. I will still purchase it from GOG so i'll have it when I do get a better PC :)
Neverwinter Nights 2 seemed to run a "decent" frame rate on my PC with the detail settings turned down to medium, but i've heard The Witcher is a bit of a pain to get running on anything but a Single Core.
Any answers would be greatly appreciated, thanks.

Oh good. Now I just have to hope my graphics card will run it. My frame rate will stutter a little bit when trying to display smoke effects in 3D graphics games, I assume that's because of my card. I remember seeing a review for the card and the review said it did terribly trying to run Half Life 2. Given the stutter with smoke effects, i'm kind of inclined to believe them, though I think they reviewed the 256 MB version of that card.
The strange thing is when I ordered my PC a few years ago I ordered the 256 MB version of that card, it's even listed as 256 MB on my invoice, but when I checked my display options recently I found out that it's actually a 512 MB card. Could the company I ordered from have made a mistake and given me a better card or is the info on my PC mistaken?
One more question, I have a 300 Watt power supply which seems to run everything fine, but could that be the reason for the slowdown caused by smoke effects in 3D games? Sorry for so many follow up questions.

It could be the company's mistake. I don't know exactly how much video memory TW1 uses so the extra 256 MB may or may not make a difference. Either way, that card is a weakling by nowadays' standards.
I think the smoke effects lag just because the card can't handle them, the PSU doesn't do that.

Actually, that seems like an awfully out of balance system you have there. That video card is seriously limiting your gaming potential, since your CPU is not too bad. I'd say that the E7300 could be paired with at least a HD5770 or even better since gaming performance is mostly determined by the video card. Although the 300W PSU wouldn't be enough then.

EDIT: the X1950 Pro is a lot more powerful than the 3450. If possible at all, I'd upgrade the 3450 (and the PSU to match, 5770 claims to need at least a 450W rated unit) and that should give your game performances a huge noticeable boost.

Yeah, unfortunately I didn't know much about this stuff at the time I grabbed my PC and I wasn't expecting to do alot of modern PC gaming because of DRM so I got an "okay" Dell Inspiron 530. I thought of upgrading the card and power supply, but I had heard that a bigger supply might fry the motherboard, plus my PC tower is a "mid tower" case so it might be too cramped to even fit that stuff in there and might cause overheating.
Here a video of it (mine has some different specs of course):
http://www.youtube.com/watch?v=SsRhzLYHeSY

A big PSU will not fry your motherboard, a cheap crappy one will (no matter how many watts it claims to have). Your components will draw only the power they need. Even on a 1000w PSU your computer would still idle at ~100w power.
Besides, modern powerful PSUs come with a big 12 or even 14 cm fan on the bottom side so that should improve the air flow a bit.

The case does seem a bit tight in the video, how much room is there actually for the video card? The HDD seems to get in the way for longer cards.

You should check the maximum length of the video card and see if anything more powerful would fit.
The PSUs are mostly standard size, only a few high-end ones are longer. A 450w or so unit would be exactly the same size you have now, just with better cooling.

I can't seem to find the power consumption anymore on the 5770 tech sheet, but 450W is just a "recommendation" (that's indeed what AMD recommends, but it's overkill), the card itself uses "only" 81W when burned with FurMark: http://www.xbitlabs.com/articles/video/display/radeon-hd5770-hd5750_5.html. So all it really requires from the PSU is a 75W 6-pin PCI Express power connector.

That's right, but one must also consider the price of the PSU and that cheaper ones have problems with actually producing the power numbers written on them. 450w is a safe bet from AMD, as even the cheesier ones should be enough for the 5770.

Besides, as the PSU is the foundation of the computer, I see two options:
-get a decent one that is more powerful then actually needed (450-500w)
-get a high quality one with less wattage (350-400w)

Both will feel relaxed powering the system we are talking about. A cheaper one at 350w may start to fail at some point because I've understood that PSU wattage decreases slightly with age due to capacitor aging and whatnot.

Bottom line: more powerful / higher quality PSU = not frying the computer anytime soon :)

My point was rather: option 3: try to keep current PSU ;) (not really sure if the Dell Inspiron thing has the required 75W 6-pin PCIE power connector though)

But otherwise, if getting a new PSU sure it's a good idea to get a somewhat over-dimensioned one (to get that optimal PSU efficiency that you reach when at 50% of max power, and because anyway it's hard to find a good-quality low-power PSU)

Cheap sketchy power supplies are a risk (and a fire hazard) no matter what power you run them at. Don't think you can get away by just buying the cheapest 600-watt power supply for a 300-watt load.

Power supplies are, surprisingly, the hardest component to shop for, because there is some truly wretched crap being sold as power supplies.

I start by using this site to get a reasonable estimate of actual load: eXtreme Power Supply Calculator Lite

Then add 50% to its recommended value, because you don't want to run even an excellent power supply at anything close to full load.

Just try this one : http://www.systemrequirementslab.com/cyri/

That site is the worst of its kind. It doesn't even know the difference between dedicated and shared VRAM, or the Core 2 Duo E6300 and the Pentium Dual-Core E6300.

If I had a dollar for every n00b I'd had to talk down after he heard from that site that he couldn't run a game, or every one that heard that he could and then found out no, he really couldn't, I'd be a lot less poor.

Feh. Avoid that site at all costs.

It runs on:
Integrated ATI Radeon X300 graphics with VGA and DVI-D
AMD Athlon 64 X2 Dual-Core 4200+
2GB RAM

http://h10010.www1.hp.com/wwpc/us/en/sm/WF06a/12454-12454-64287-321860-3328896-3253421.html

most details set to low, no problem playing it.

No requirements checker showed ;-)

You are probably thinking of multiple GPU systems (i.e. SLI or Crossfire). The Witcher has problems with those, but it's fine with multi-core CPUs. I have a quad core and it runs fine.

J'ai les Witcher 1 2 3 . Le 2 et le 3 marchent très bien .Mais le 1 se bloque dans les faubourg de Wyzima.Plus moyen qu'il ne marche si quelqu'un à la solution merci d'avance .