Originally posted by: Howard
Even now, the top of the line graphics cards (Crossfire X1900XT and SLI 7900GTX) are bottlenecked by even overclocked Athlon FX CPUs in certain situations. It's not inconceivable that the next-gen cards will suffer even more if CPU performance doesn't increase.
It depends on those "certain situations" really though. I agree with you 100% at 1280x1024 and below (the majority of LCDs out there). But at resolutions above that, only the GPU power will hold a system back (I'll link some benches below).
When I hear someone wanting to build a high-end gaming machine, a 1280x1024 LCD doesn't come to my mind. IMO, if the OP isn't putting a good deal of money into a very good LCD or a good CRT, then, yes, the ultra-high-end GPU is wasted unless he matches it up with a good CPU. If he's planning on playing at 1600x1200 or above, a simple A64 3000+ would give him similar performance as high-end FX chips (and likely Conroe as well).
CPU is an FX-57 and frames go lower as res goes higher than 16x12--
1,
2... well the whole article basically since it focuses on CFire, SLI, and the GX2.
CPU scaling for
Oblivion... 800+mhz extra speed... dual-core... Oblivion doesn't care.
Conroe may beat AM2 by
40% in Far Cry... but that's at 1024x768. That gain drops to 0% for Q4 and SC:CT at 1600x1200 with AA/AF. Since we know AM2 isn't really much faster than their sckt939 counterparts, it's relatively safe to assume Conroe isn't going to be faster than sckt939 at higher resolutions. For those with 19" LCDs, it's a different story.
IMO, if you want a high-end gaming rig right now, spec out a great 20"+ LCD monitor or CRT, match it with the absolute best GPU solution out there (if you like ATI go Crossfire, if nV go either SLI GTX or GX2), pick out a powerful PSU, then grab whatever A64 you can get with the rest of your budget (the 3000+ are going for $100 right now).
Here's one way to look at it if you're interested in gaming at 1600x1200-- let's use Oblivion for example since I found a bench that shows single and dual GPUs
well. If you spend a lot for a high-end CPU, you'll get no benefit at all at 1600x1200 (as shown in my link above). However, if you go with a low-end chip and match it with a second gfx card, you can almost double your frames:
single GTX--
20.3
SLI GTX--
38.7 (91% increase)
Granted, 2 GTXs can kill any budget... even one where price is "no object". But, the same holds true for the cheaper SLI GTs. You can grab those now for $250 ea. with a hot deal. That's $500 plus $100 for the 3000+. For $600, you'll get a lot better performance with that than with a single GT matched with an X2 4200+ for the exact same price.
Sorry for the long post. These are just some thoughts that come to my head when someone mentions a high-end gaming system.