Do not use Xbench for any OpenGL testing. Swords and sandals 5. It's purely CPU bound in most machines. How else would a Radeon card beat out a Radeon 9800 Pro in a 3D benchmark?

In our 'Mac versus PC' game test page, we ran Doom 3 at 1600x1200 with. We used ATIccelerator II to overclock the Radeon X800 XT (core clock set 5%. If you go strictly by Doom 3's published averaged at the end of the. Jun 11, 2009  How to overclock a mac ATI GPU. How to overclock a mac ATI GPU. Skip navigation Sign in. Overclocking a Mac Mini G4 from 1.25 Ghz to 1.5 Ghz - Duration: 4:04.

It's not a good test for 3D.Games are better tools for benchmarking 3D.a2daj is absolutely right. You have to be very careful when choosing a video card benchmark on the Mac. Many benchmarks, and even 3D games, are CPU dependant on the Mac. This is less of a problem with the new G5's, but you should still choose your benchmarks carefully.I recommend the following for video card over-clocking testing:Quake 3 demo, Max settings, 4xFSAA 8XAF, 1600x1200 (or as high as your LCD will go)UT2004 Antalus fly-by bench (NOT the botmatch), Max settings, 1600x1200 (or as high as your LCD will go)I’d like to hear other’s suggestions.abc. Do not use Xbench for any OpenGL testing. It's purely CPU bound in most machines. How else would a Radeon card beat out a Radeon 9800 Pro in a 3D benchmark?

It's not a good test for 3D.Games are better tools for benchmarking 3D.a2daj is absolutely right. You have to be very careful when choosing a video card benchmark on the Mac. Many benchmarks, and even 3D games, are CPU dependant on the Mac. This is less of a problem with the new G5's, but you should still choose your benchmarks carefully.I recommend the following for video card over-clocking testing:Quake 3 demo, Max settings, 4xFSAA 8XAF, 1600x1200 (or as high as your LCD will go)UT2004 Antalus fly-by bench (NOT the botmatch), Max settings, 1600x1200 (or as high as your LCD will go)I’d like to hear other’s suggestions.abcHalo is still the most GPU dependent game out there.

Testing it with lens flares set to low should be good. Unfortunately I believe that it calculates all the time, so the timedemo results include the loading time that is dependent of HD speeds. Halo is still the most GPU dependent game out there.

Testing it with lens flares set to low should be good. Unfortunately I believe that it calculates all the time, so the timedemo results include the loading time that is dependent of HD speeds.I did some testing with Halo and saw pretty flat results going from stock to a 30% overclock.

This same overclock showed dramatic improvements in the Quake 3 benchmark. (I posted the numbers earlier in the thread)Someone suggested that the AGP bus speed or system bus speed might be the limiting factor on my 15' PB 1.25GHz/9600 Mobility since Halo is not supposed to be CPU bound. All I know is that Halo does not seem to benefit from overclocking the GPU on my system.

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Your mileage may vary.I be interested if anyone else has seen a decent improvement in Halo benchmarks.abc. First a note:The settings will not always take effect. You may have to reset and try again. If you see no performance gain in the recommended tests then the settings probably haven't been applied.I can overclock my 9800MSE up to 420mhz:core 380mhz:mem without artifacts.

The core seems to be the first to overheat because at 430mhz I start getting the pixels flashing in dark areas. At these speeds Halo went from 31.03 to 34.81fps at my settings. Quake went from 200 to 220 fps.I put an ATI Silencer on my card so that is probably why i can clock so high. I think from what I've seen at xlr8yourmac.com the highest a stock 9800 can go without artifacts is around 400mhz:core.And for anyone with an OEM 9800, your chip and heatsink is the same (I believe) as the retail version. You should have no problems clocking up to 380mhz:core. Ok, here's my experience.Initially I downloaded and installed the ATIccelerator II.

The numbers it gave me for my card (a Radeon 7500 mobility in a PowerBook G4 Ti 667) were somewhere around 250+mhz for Processor and something around 215mhz for Memory (I can't remember exactly, but those are in the ballpark).After messing around with the settings, I saw some improvements. Then, for kicks, I clicked the Stock Frequencies button.Now, here are my numbers:Processor: 114.75 MHz (-50%)Memory: 183.38 MHz (0%)Now, I may not be the most savvy overclocker ever, but that just doesn't seem right. Stock numbers have my processor SLOWER than the memory, and severely underclocked? I think not.Now, whenever I try and boost my Processor clock simply back to normal, it freezes up at about 170 MHz.Are these numbers true? Is my card really running at 50% normal speed? Is there any way I can rectify this?

What gives?Thanks. Ok, here's my experience.(a Radeon 7500 mobility in a PowerBook G4 Ti 667) were somewhere around 250+mhz for Processor and something around 215mhz for Memory (I can't remember exactly, but those are in the ballpark).Processor: 114.75 MHz (-50%)Memory: 183.38 MHz (0%)That's funny, I got an iBook Oct. 2002 with a Mobility Radeon 7500 and when I first opened up ATIccelerator it showed both frequencies at 90(!) MHz. Both were 50%(!) underclocked. I clicked that default settings button (180 MHz?) and my display went haywire. I had to hard boot the computer.

I'm not quite sure if this program is always showing the true clock frequencies.I gonna try it on my G5 tomorrow (Radeon 9600 Pro) to see what I get.Greetings, Andreas.editI could clock my MRadeon 7500 up to 180 MHz processor and 126 MHz memory speed. When I tried higher on the memory speed, I got artifacts. I didn't try higher on the processor speed./editanother editMy iBook screen just froze while I was typing the previous paragraph. It's still playing iTunes, though. It looks that 180 MHz on the processor is to high as well./another edit.

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