Just wanted to post an update after a little bit more time with the cards.
Man, they are very fun cards to play with. I'm a tinkerer, so the amount of tweaking possible is right up my alley.
Here are both cards installed in the rig for now. I still have to take them out and install the backplates. I'll probably also put on my own TIM when I do.
Here is an updated tabled of my OC results including both cards
If you have trouble reading the numbers you should just be able to zoom in a little bit on your browser to make it readable.
GPU 2 ended up being a better GPU than than the first one I tried. They were actually fairly similar given that they had the same out of box boost clocks. One main difference though was that for some reason GPU 2 only boosted to 1.15V out of the box while still hitting 1136. Because of this it was always behind GPU 1 in terms of the voltage it took.
I have a few decent bits to get through, but no real order so I'm just going to spit them out ...
- GPU 1 ASIC = 78.9
- GPU 2 ASIC = 76.2
- I have so far settled on 1320 core for my gaming clocks
- GPU 1 voltage for 1320 game stable = 1.26250V software controller
- GPU 2 voltage for 1320 game stable = 1.24375V software controller
- Speaking of voltage, you guys should all read your voltage with a DMM. Actual core voltage was about 0.045V
higher than the controller set it to under maximum load. For example, GPU 1 reads 1.309-1.31
under full load despite the controller setting 1.26250V. - Also on the voltage bit, it seems what is truly important here is power consumed. GPU 2 consumed more power at each voltage setting than GPU 1, but it took them roughly the same power consumption to be stable at similar clocks (which meant higher voltage for GPU 1)
- Example: During a Crysis 3 bench max Power on GPU 1 was 103% while on GPU 2 it was 104% at 1320 MHz. Voltages at 1.2625 and 1.24375 respectively.
- Onto the ACX coolers ... I know I said it the other night, but absolutely fantastic job by EVGA on these.
- Max temps in SLI I've seen in games so far at the gaming clocks and voltages mentioned above is an identical 63C on both top (GPU 2 in spreadsheet) and bottom (GPU 1 in spreadsheet) GPU
- I have a steep fan curve (100% fan at 60C) as I want them as cold as possible
- I also have this little gem that really makes all the difference in the world, but doesn't take away from what the ACX coolers will do when given good airflow
I told you I was cheating a little bit.
And now for the part that I was really interested in and a little teaser...
System Specs:
- Core i7-3930K at 4.7 GHz under water
- Asus Rampage IV Formula
- 16 GB Corsair Dominator Platinum 2133 MHz CL 9 at rated speeds and timings
- 256 GB Samsung 840 Pro
- GPU Setup 1 -> GTX Titan SLI at 1150 Core - 6200 Mem at 1.2V under water both PCI-E x16 3.0 (Nvidia 320.49 Driver)
- GPU Setup 2 -> GTX 780 Classified SLI at 1320 Core - 6200 Mem at volts mentioned above both PCI-E x16 3.0 (Nvidia 326.41 Driver)
**A note about drivers --- I am pretty bummed about this. I probably spent 50+ hours benching my Titans and gathering a ton of data on the 320.49 driver knowing that I could use the same driver when I got 780's ... then the Classified comes and it recommends 326.41 driver for proper functionality, so I have little choice. I simply don't have time to retest the Titans. If it were my paid job I certainly would, but it's not so it will just have to be noted that the driver versions were not the same.
I am going to be honest, that result surprised me a little bit. I am not disappointed by any means, I just really thought the 780 would edge out the Titan with the clock differences.
I have two reactions to this ...
1) The Titan has been massively undersold in every review ever published on it, mainly because they do not run them how most people who are serious about performance run them. That is clocked as high as possible, even if it takes a modified bios to do it (mine definitely did, as do almost all).
2) It is still pretty impressive that you can buy a 780 and reach near modded bios Titan level performance. All while maintaining your warranty. How beautiful! Thank you EVGA.
That's all I really have for now. I think I've rambled long enough.
post edited by thebski - 2013/08/07 20:31:21