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GTX 780 Owners Club

Joined the club...replaced my broken R9 290 which I got a full refund for...with an MSI GTX 780 Gaming Edition OC...looks very nice in my Aerocool Dead Silence case ;) So far clocked up to a max of 1163Mhz Core and 6580Mhz Mem with no voltage added.

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PhysicsMan94 said:
What kind of temps are you getting with your 780s? I have 2 ref ones in SLI and I'm getting around 40 (top idle), 35 (bottom idle) and 81 (top full load), 79 (bottom full load), bring on Winter I say!
Click to expand...

I have 2x MSI GTX 780 reference and 1x EVGA GTX 780 SC reference cooled card. Yesterday I overclocked the MSI 780's from their stock 863MHz to 941MHz to match the speed om the EVGA 780 SC card. I set Power limit to 102% with a linked Target temp of 84°c. So basically the Top and Middle cards max out at 84°c while keeping the boost clock around 1030~1040MHz. The bottom card (the EVGA) sits around 78°c.
Idle are top 36°c, middle 35°c, bottom 26°c. The fans speed are all from the standard default profile - I haven't changed that.
 
Feel a bit like a thread necormancer here, but not long had mine, and just started some overclocking.

First, it's been so long since I overclocked a graphics card, I found I'd forgotten how. First go I screwed up the fan settings and ran through Heaven a few times before I noticed I'd locked the fan at 27% instead of getting it to follow my profile! :o

Anyway, been pushing it a bit since. Currently got to +215 on the core with stock volts. In Heaven, this give a core clock of 1202MHz, temp of 72C @ 83% fan.

Now, I don't really understand all this standard and boost clock business, but I see in all the OC threads people are quoting their standard and boost clocks. I can only see mine in GPU-Z so I assume where they're getting them from.

However, GPU-Z reports the boost clock as 1117MHz, yet as I say, I see (through the Afterburner display) 1202MHz when running heaven. What's with the discrepancy here? And which is the real boost clock for my card? Anyone know?
 
Good thinking!

Yeah, in sensors it shows 1202MHz being hit, but the graphics card tab doesn't change.

So, does this mean other people's reports of their overclocks are off? Or is GPU-Z not working properly on my system for some reason?

Not a big deal, but I'm just trying to get a feel for how my overclock is working out. Already at over 33% on the core with no voltage increase and perfectly acceptable temps. Starting to wonder if it's right. Don't recall any other card I've had being quite so easy to push so far so quickly...
 
The figure shown on the first screen in GPU-z is just the initial computed figure for the minimum boost clock and doesn't change - sensors tab shows what its actually running and in a power/thermal limited situation might drop back to the lower figure.

Mine does 1267MHz with a minor voltage boost (extra voltage doesn't seem to make much odds within the normal voltage range) can get it upto 1300+ with custom BIOS, etc. but not really worth the extra risk to the card for me for the small additional performance.

EDIT: IIRC if its a B1 revision core it will probably do around 1240Mhz on average at upto 1.212v.
 
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Rroff said:
The figure shown on the first screen in GPU-z is just the initial computed figure for the minimum boost clock and doesn't change - sensors tab shows what its actually running and in a power/thermal limited situation might drop back to the lower figure.

Mine does 1267MHz with a minor voltage boost (extra voltage doesn't seem to make much odds within the normal voltage range) can get it upto 1300+ with custom BIOS, etc. but not really worth the extra risk to the card for me for the small additional performance.

EDIT: IIRC if its a B1 revision core it will probably do around 1240Mhz on average at upto 1.212v.
Click to expand...

It is indeed a B1 revision, so that's good to know. Cheers. I've not adjusted the voltage yet, and given that the clock is already looking good at stock volts I may not bother. I'm sure it's perfectly safe, but guess it would mean marginally more heat and noise.
 
I found overclocking on the stock bios to be stupid as clocks wouldn't stick as power and temperature limits kick in and things changed.

Flashed Skyn3t's bios and eveything became super easy. Clocks stayed constant and you aren't limited by the 106% power limit.

Finally be careful with using heaven as a stress test. I have had 2 780s, a lightning that wouldn't do 1200Mhz n any game yet was fine at 1250Mhz in heaven and my current reference that will happily run at 1280Mhz in heaven but games will crash above 1240mhz (all using 1.212v).
 
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