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2600xt?
- Thread starter I'mAMac
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I only know of someone taking apart the 20" seeing macforums posted a link. Would be nice for someone too do that for the 24". If someone does open up the 24", I just hope they take good pics of the gpu or wtv it is called in this case.
lordjonny
macrumors regular
i reckon it could just be a 2600XT underclocked for the imac due to heat issues or suchlike this would explain the identifier and why 
sed it was a 2600 pro as the benchmarks would be similar
mine will come next week so i will find out when it comes if no one else has😀
im sure theres sumthing wrong with my idea, just a couple of cents
sed it was a 2600 pro as the benchmarks would be similarmine will come next week so i will find out when it comes if no one else has😀
im sure theres sumthing wrong with my idea, just a couple of cents
Dont Hurt Me
macrumors 603
If Apple had a Xt in it they would be beating their chests telling us about it & how great it is.i reckon it could just be a 2600XT underclocked for the imac due to heat issues or suchlike this would explain the identifier and why
mine will come next week so i will find out when it comes if no one else has😀
im sure theres sumthing wrong with my idea, just a couple of cents
Unless it was a last minute change.
If you look at the iMac developer note it talks about the 2.8 processor being only a CTO option, and yet we see at the last minute they made it a standard config.
http://developer.apple.com/documentation/HardwareDrivers/Conceptual/iMac_0708/index.html
Maybe at the same time they decided to switch to the XT since it is only $25 more and yet 33% faster.
Neanderphil
macrumors member
Ah very good, this seems to have gone unnoticed. I guess we can safely say that this is the Mobility XT now. Apple probably have underclocked it, but using ATI tool in windows will allow the average user to bump the core/memory frequencies back up, without technically voiding their warranty.
I don't think that's recommendable to do though since the cooling system is tuned for the current clock speed. But if someone feels adventurous please go for it 🙂
Well this is great news, only problem is that i wont be doing bootcamp on my new iMac because i have decided to just upgrade my windows pc to be able to play the next gen of games.
OTA
macrumors newbie
"I don't think that's recommendable to do though since the cooling system is tuned for the current clock speed."
For SURE.
And the new imac it´s a little bit warm. This overclock, without a better colling system, will problaby crash your mac😛
Sorry for my english writing. eheheh Brazilian englishless guy!
ehhe
For SURE.
And the new imac it´s a little bit warm. This overclock, without a better colling system, will problaby crash your mac😛
Sorry for my english writing. eheheh Brazilian englishless guy!
ehhe
Neanderphil
macrumors member
My current imac (intel core due 2.0ghz x1600 256mb) is clocked by default at 400/400. Using ATI tool i can bump up the frequencies to 500/500 with no stability or heat issues what so ever.
Note that the ASIC for the HD 2600 is the same as the HD 2600 XT.
ATI Mobility Radeon HD 2600 XT - M76 - 9583
ATI Mobility Radeon HD 2600 - M76 - 9581
THe difference between the two cards is ONLY in the clock speeds of the associated components (GPU, Memory, and shaders for devices with a multiplied shaders clock, not ATI as far as I can tell). The Radeon HD 2600 Pro is a custom card developed by ATI for Apple, it is NOT identical to any existing ATI card (hence the new name) and so exiting benchmarks won't tell us what to expect (except maybe that performance will better than the HD 2600 (with its DDR2 RAM) and unlikely to be much better than 2600 XT, a range that seems to be around 30%). No matter what, we are not looking at any of the 8800s and if that is the definition 'acceptable' graphic card, then the iMac is not the right computer for you.
What we know:
The chip used in the iMacs is the same silicon as the Mobility 2600 XT. The means is supports decoding all the fancy new video types (BlueRay/HD DVD/ect) and supports all required aspects of DX10 under windows so it will 'run' any game likely to be released in the next couple of years.
What we don't know: the clock speeds
Once we know the clocks, and not until then, will we have a ballpark estimate of what what kind of performance to expect. That will give us a baseline that will be modified by the quality of the code in the Apple/ATI ROM, the custom drivers (at least on the Mac side), and the overall interface to the rest of the system.
To put it more simply, we won't know until we find someone (like barefeets) who knows how to benchmark, has a new '2600 Pro', Boot Camp, and a fully patched Oblivion or equally system killing game and see what the real numbers are.
But I want to know NOW!
RRK
macrumors 6502
Yeh, I heard it on the grapevine that this C2E has already been overclocked to 3ghz with no problems.
Wait we are talking about the GPU, the 2600 pro has been overclocked to 700/700 with GDDR3 by Sapphire.
Neanderphil
macrumors member
Im referring to the GPU. Sapphire have overclocked the 2600 pro but that does not necessarily mean that the imac will be stable at these frequencies. The sapphire model has a large heat sink and fan, it also is placed in a tower which has improved convection cooling as opposed to the much smaller and thinner imac enclosure.
Hazarding a guess i would say that higher frequencies could possible be achieved in the 24" rather than the 20" due to the larger enclosure and hence better convection cooling.
Add another ditto to that....
Surely one of the early adopters must be a gamer...or are all of them waiting for someone to put in some solid FPS numbers before heading out to buy...all these comments about the 2600 Pro's poor performance is making me nervous...I mean I don't expect any game to run @ fancy settings but should'nt it @least be better (even if slightly) than the previous 7600 GT ????
RRK
macrumors 6502
RRK
macrumors 6502
Do you overclock it in windows bootcamp or on OS X? Sorry to get off topic but how exactly do you use ati tool? What should the readings be and all that?
Hopefully ATIccelerator II will support his GPU. (if not now, then hopefully soon)
Has anyone given it a try yet?
Has anyone given it a try yet?
ImAlwaysRight
macrumors 6502a
MacWorld's graphic tests
No matter what graphic card is reported, proof is in the pudding.
MacWorld lab tests show the Nvidia GeForce 7300GT 128MB BEAT the ATI 2600 Pro 256MB in UT 2004 frame rate test. Sure, the results were close (less than 2fps), but I'd expect, after an entire stinkin' year of NO updates, for Apple to put in a graphics card that at least showed some improvement in 3D. No wonder we have no pretty charts showing the graphics on Apple's iMac website.
That would mean the optional Nvidia GeForce 7600GT 256MB in the previous iMac 24" would really kick some ATI 2600 Pro butt.
Sorry to pop all of y'all's bubbles. 🙁
No matter what graphic card is reported, proof is in the pudding.
MacWorld lab tests show the Nvidia GeForce 7300GT 128MB BEAT the ATI 2600 Pro 256MB in UT 2004 frame rate test. Sure, the results were close (less than 2fps), but I'd expect, after an entire stinkin' year of NO updates, for Apple to put in a graphics card that at least showed some improvement in 3D. No wonder we have no pretty charts showing the graphics on Apple's iMac website.
That would mean the optional Nvidia GeForce 7600GT 256MB in the previous iMac 24" would really kick some ATI 2600 Pro butt.
Sorry to pop all of y'all's bubbles. 🙁