Sorry to make a post just asking: Which one? but I don't really know when comparing the cards which features are most important i.e. core clock speed vs pixel pipelines and memory interface. I also don't know if either or both of these would be bottlenecked by my current system.
I'm looking for advice on which of these cards would be a better purchase for an older agp rig. I currently have a pentium 4 3 ghz processor and 1 gig of ram. I had to replace a power supply and the 9800 pro it fried. I picked up an an Antec earthwatts 380watt psu but have yet to replace the video card.
I'd really appreciate any advice about which features are most important and which brand is more reliable. They are almost exactly the same price and it seems like my power supply would be adequate for either.
Jeff 2087: The 7900 you linked makes me wish I was ready to upgrade to PCI Expressbut between the motherboard and a new PSU it would be too expensive right now.
Ananan: the 7800 does look pretty good but i'm a little concerned about the power supply requirements.
Kaotao: I probably wouldnt be overclocking either of them as I'm inexperienced with overclockling. I'm be inclined to agree with getting the cheaper one if performance is about the same but I'm concerned about some of the reviews about the evga 7800 gs being somewhat unreliable and particuarly one about the power supply requirements being deceptive.
Pros: Can't tell because I can't get the board to run.
Cons: Published spec is wrong Most power supplies can't handle this chipset.
Other Thoughts: The nVidia spec states that a 350W or higher power supply is required to run the 7800GS. The manufacturer states (over the phone) that this spec is very misleading. The real spec is 19-20 amps CONTINUOUS (not maximum) on the 12V rail. Many power supplies, even in the 500-600W range, do not provide this much current at 12 volts. Check your power supply carefully before you buy this card.
My PSU is rated at 17 amps over the first 12v rail and 15 amps over the second rail (link: http://www.antec.com/specs/EA380_spe.html ) so if those are the real requirements are that high I might have to get the 7600 gt. There's of course contradictory review about The Power requirements:
Huge upgrade from my previous FX5600XT. Now I run every game at 1280x1024, max details on everything, with solid framerates. Minimal power requirements, I'm running it off a 250W (300W max) Dell PSU, and its stable as anything. Got this one $25 cheaper than listed on newegg today (2/25/2006), so its a great deal.
So unless someone has more information about the power supply specs or experience running the 7800 on a similar PSU to mine and and the out of box performance is almost identical I'm leaning towards the 7600 gt.
Thanks again for the advice and info about the relative power of the cards.
Sorry to keep asking all these questions but I'm not sure about how to calculate if i have the necessary power for the X1650 XT. I read on newegg that it required 30 amps on the 12v rail and my PSU is rated at 17 amps on the first rail and 15 amps on the second rail. Are these individual amps the max numbers available or are they combined with something else to find the maximum power available.
Unfortunately i picked up the power supply at CompUSA as the store was closing down (so it can't be exchanged) and I'm on a somewhat tight budget so i'm sort of wed to the PSU at this point. The power supply is an antec earthwatts 380 watts (specs: http://www.antec.com/specs/EA380_spe.html )
If the X1650 XT would work it would be a very tempting option at 140$