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GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780?

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draf7y
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2018/02/28 15:33:47 (permalink)
I purchased a "Titan" on ebay, but what I received appears to be a GTX 780 dressed up as a Titan Black...let me explain.
 
So I was pleasantly surprised to see the Titan Black front plate when I opened the package, despite the ebay order being for a standard Titan (looking back at the ebay pictures, they are accurate showing a Titan black despite the seller only claiming to have a Titan for sale). Well Maybe the seller didn't know the difference...his poor knowledge = my gain right? Nope.
 
I started to suspect an issue when I was unable to enable CUDA double precision performance (a feature of Titan and Titan Black). So I started investigating this card further. The Bios sticker on the back of the card was 80.10.3A.00.80 (a GTX 780 Bios), and the Bios on the card itself is a 80.10.2c.00.92, which is a standard Titan (superclocked?) Bios. Remember, the front plate is a Titan Black front plate.
 
Ok so Bioses are mismatching and the front plate is mismatching. What about specs? Cuda-z says this is a Titan, but it also reports 2304 cuda cores. Only the GTX 780 has 2304 cuda cores [1]. Further, single precision compute performance is at 3700 GFLOPS/s. The titan should be yielding 4499 [1]. nvidia-smi is reporting 6 gb of ram though...I think this was maybe a stepped up GTX 780 [2]
 
So is it possible that someone simply dressed up a GTX 780, loaded a Titan bios onto it, stole a Titan Black front plate from a broken Titan black, and sold this on ebay as a Titan? The 780 and Titan chips are so similar that I think the Titan bios might work just fine on the 780. In fact, I was able to flash 780 and Titan black Bioses onto this card and it worked with all of them...
 
[1]https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#cite_note-36
[2]https://www.evga.com/articles/00830/ 
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    joeymir
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    Re: GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780? 2018/02/28 16:46:34 (permalink)
    I've heard this happen  several times over the years with the 700 Series/Vanilla Titan. Sounds like You got a 780 dressed up for sure. There is a lot of very dishonest people out there that deserve nothing more than a new hole to breathe out of. Luckily for you, you bought on Ebay, and i'd start going through the process of letting Ebay know about your fraud seller, and let them help you get a refund. Hopefully see that seller never sell on Ebay again. 
    post edited by joeymir - 2018/02/28 16:52:12

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    bcavnaugh
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    Re: GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780? 2018/02/28 17:50:18 (permalink)
    They did Drop "double precision" in later versions of the Titans.
    My GTX Titans have Double Precision and I can enable and disable in the NVIDIA Control Panel.
    I have ever seen it listed as CUDA Double Precision though.
     


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    harmattan
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    Re: GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780? 2018/02/28 23:09:35 (permalink)
    This does happen. Reason you see a secondary market for stock coolers and boxes on eBay.

    The only definitive way is to benchmark. Even GPU-z can be faked from what I understand.
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    Vlada011
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    Re: GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780? 2018/03/01 03:03:53 (permalink)
    I doubt TITAN bios could be used on GTX780.
    Difference is number of CUDA Cores, memory size, double precision.
    GTX780Ti is much closer but it's not possible to be load BIOS for TITAN Black.
    They could fake somehow, change settings, numbers, etc with BIOS Tweaker, but to flash properly with real TITAN Black bios I doubt.
     

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    draf7y
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    Re: GTX 780 dressed up as a Titan Black - is it possible to load Titan bios onto GTX 780? 2018/03/01 16:30:37 (permalink)
    Thank you guys for confirming my suspcicion. 
     
    Vlada011, is there an explanation for the 780 number of CUDA cores reported by CUDA-z, yet the Titan bios sucessfully installed and working on the card?
     
    Vlada011
    I doubt TITAN bios could be used on GTX780.
    Difference is number of CUDA Cores, memory size, double precision.
    GTX780Ti is much closer but it's not possible to be load BIOS for TITAN Black.
    They could fake somehow, change settings, numbers, etc with BIOS Tweaker, but to flash properly with real TITAN Black bios I doubt.



    bcavnaugh
    They did Drop "double precision" in later versions of the Titans.
    My GTX Titans have Double Precision and I can enable and disable in the NVIDIA Control Panel.
    I have ever seen it listed as CUDA Double Precision though.
     





    On linux, the checkbox is CUDA - Double Precision. Here is an example of someone who sucessfully set the DP on their Titan. For me I get an error saying "Failed to set CUDA - Double Precision" beneath the check box after I try to check it. 
     
     
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