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  #61 (permalink)  
Old January 11, 2010, 10:07 PM
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This is probably getting pretty close to the max OC for all 4 cards together.............





That's a little over 20% on the shaders, but nowhere near the kind of output suggested above for GT250 cards (don't know if that's the OC, or if it's better tech in spite of being compared mostly to the older gen cards).

I'm pretty happy with the output (suspect I'll average somewhere around 30K for the 5 GPUs and then slap on an extra 2K+ for the vmware), and will probably stress test this for a few days before deciding if I want to go through the mind numbing task of trying to OC the cards individually.

edit: I am curious about the reporting on the slot by GPU-Z though..... I'll have to double check, but I thought this MSI board was a full 4X16 board, or is that a limitation of the 9800GT?
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  #62 (permalink)  
Old January 11, 2010, 10:24 PM
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when you populate 4 slots i think it goes into x8.

and you still have room to spare on shaders, 100-200 depending on juice and cooling of course.
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  #63 (permalink)  
Old January 11, 2010, 10:26 PM
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Also, GPU-Z is up to 0.3.8 now, may be an issue with the older version
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  #64 (permalink)  
Old January 11, 2010, 10:27 PM
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Quote:
Originally Posted by _dangtx_ View Post
when you populate 4 slots i think it goes into x8.

and you still have room to spare on shaders, 100-200 depending on juice and cooling of course.
Yeah, a quick check of HWC's review confirms this.....

Quote:
Thirty two of these lanes are reserved for graphics and can be split in a number of different ways. A board with four slots - like the GD70 - can operate in 16x/16x mode with two cards or further split the lanes down for 8x/8x/8x/8x operation. Given that an 8x second generation PCI-E slot is plenty of bandwidth for the majority of video cards out there
Not sure if running on an 8X slot has any effect on this gen of cards when it comes to PPD.

As far as extra room on the shaders goes.... I'm pretty sure this is about it for a "synced" OC on the shaders... could be it's only one of the 4 cards laying down on the job, but it'll take quite a bit of work to try to get each individual card oc'd to its max level.
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  #65 (permalink)  
Old January 11, 2010, 10:36 PM
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Quote:
Originally Posted by sswilson View Post
Not sure if running on an 8X slot has any effect on this gen of cards when it comes to PPD.
It doesn't.
Quote:
Originally Posted by sswilson View Post
As far as extra room on the shaders goes.... I'm pretty sure this is about it for a "synced" OC on the shaders...
Unlink the shaders. There's no reason to keep the core and shader speeds locked when it comes to folding. It's best to leave the core mostly alone and then just clock the shaders as high as you can get them.
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  #66 (permalink)  
Old January 11, 2010, 10:59 PM
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Quote:
Originally Posted by Zero82z View Post
It doesn't.

Unlink the shaders. There's no reason to keep the core and shader speeds locked when it comes to folding. It's best to leave the core mostly alone and then just clock the shaders as high as you can get them.
Already done. When I said "synced", I meant all 4 cards synced to the same clocks, not shaders/core synced together.

I might try dropping the core and memory down to default levels to see if that makes any difference to the upper end of my shader oc, but deep down that just feels wrong..... :)
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  #67 (permalink)  
Old January 12, 2010, 07:53 PM
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Quote:
Originally Posted by sswilson View Post
Already done. When I said "synced", I meant all 4 cards synced to the same clocks, not shaders/core synced together.
Ah, I see.
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