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post #508 of (permalink) Old 05-04-2019, 03:36 PM - Thread Starter
Barefooter
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Overclocking & Benchmarking the RTX 2080 Ti Video Cards Now Under Water

I already covered overclocking these video cards when they still had the stock air coolers on. Now that they are under water, I’ll see how much more I can squeeze out of them.

I’ve seen a lot of people flashing their video card bios with various different versions with higher power limits, and from what I’ve seen it seems like it doesn’t make a whole lot of difference, unless you are just trying to squeeze every last frame out of your video cards.

There’s also a shunt mod to make the cards use more power. I will not be flashing the video card bios or attempting any kind of shunt mod here. It’s just not worth it in my opinion.

To start with I ran the VF Curve tuner again. It came up with a score of +112.




Like before, I am using the Heaven Benchmark again for all the testing. The maximum GPU temperature during this session got to 40° C with a Water-Air delta max of 3.4°

Since previously both cards could do +900 on the memory I started there, and put the core clock to +120 where it crashed immediately. So I dropped the clock down to +110, and worked on the memory overclock first.

I usually just keep notes on a note pad, but I put this into chart form so you can see the “method to my madness”

With the Core Clock set at +110, it would crash with the memory set to +1200 and +1180, but would run fine with no pixilation at +1160. From here I run the actual Heaven Benchmark rather than just the video loop, so that I can actually see what memory overclock gives me the best results.

Dropping down +20 MHz at a time, you can see looking over this chart that even though the memory can run all the way up to +1160, my actual best score is with the memory set to +1040.




Now back to the Core Clock, I already know it won’t run at +120, but it does pass at +116. Amazingly my best Heaven score was with the Core Clock set at +112 which is exactly what the VF Curve Tuner came up with!

I finished up the overclocking here on Saturday afternoon with my best settings of +112 on the Core Clock and +1040 on the Memory Clock, and then I shut it down over night.

Early the next day on Sunday morning it was a nice cool 60° F in my work shop when I ran all these benchmarks. The video card temps stayed down between 28° to 29° the whole time!

These Heaven scores were with the CPU at 4.8 GHz. At 5.0 GHz the 1080P and the 1440P did not improve but at 4k the score went up to 3585. Here’s the Heaven screenshots at 4.8 GHz. These scores are good enough for the 8th, 9th, and 5th spots respectively on the Top 30 Heaven Benchmark Scores here on OCN.


Heaven 1080P FPS: 261.1 Score: 6577




Heaven 1440P FPS: 190.1 Score: 4788




Heaven 4k FPS: 139.7 Score: 3520




The rest of these benchmarks are with the video cards at the same +112 & +1040 settings, but with the CPU on my 5.0 GHz profile. The chart below compares these with the 4.8 GHz profile. On the Fire Strike Extreme Top 30 this is 10th and on the Fire Strike Ultra Top 30 this is good enough for the 4th spot.

Here is the Fire Strike Score: 34,143




Fire Strike Extreme Score: 25,393




Fire Strike Ultra Score: 15,583




In Time Spy Benchmark Top 30 I snagged the third spot (for now anyways).

Time Spy Score: 22,067




Time Spy Extreme Score: 11,742




During these benchmarks from cold start to finishing all the above benchmarks:

GPU temps ranged from 24° to 29°
Coolant temp ranged from 17° to 21°
Water – Air Delta ranged from 1.9° to 3.5°

I’ve added the these results in the two columns on the right of this chart I started during the air cooling overclocking. Remember when the cards were air cooled one card would only do +100 on the core clock, and one would do +135... but somehow together they both would run at +135

Now on water cooling my best Core Clock is +112, but the Memory Clock is quite a bit higher, and most importantly is that the GPU temps are significantly lower.





Overclocking the Video Cards and running all these benchmarks is one of the most fun parts of building a new rig for me. Had a blast doing this


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Devastator
(14 items)
Secondary Rig
(13 items)
CPU
i9-7900X
Motherboard
Asus Rampage Extreme VI
GPU
2x EVGA 2080Ti XC Gaming
RAM
G.Skill TridentZ Royal 32GB 3600 16-16-16-36
Hard Drive
Intel Optane SSD 480GB
Hard Drive
Samsung 850 EVO 2TB
Hard Drive
2x Seagate Iron Wolf Pro 12TB
Power Supply
EVGA SuperNOVA 1600 T2
Cooling
Hardware Labs Black Ice SR2 Radiators 4x 560mm + 2x 280mm
Cooling
Aquacomputer Aquaero XT + Aquaero LT
Cooling
2x Aquacomputer D5s with custom chrome plated Bitspower mod kits
Cooling
2x Aquacomputer Aqualis 880ml Reservoirs with Nano Coating & Aquabus Interface
Case
CaseLabs THW10 with Custom Powder Coating
Operating System
Windows 10 Pro
CPU
Intel Core i7-4790K
Motherboard
Asus Maximus Extreme VI
GPU
EVGA GTX 980 ti Classified
RAM
G.SKILL Trident X Series 32GB (4 x 8GB) DDR3 2400
Hard Drive
Samsung 850 Pro 500GB
Hard Drive
Seagate Desktop HDD 4TB
Power Supply
EVGA SuperNOVA 1300 G2
Cooling
EK 420 Rad + EK 280 Rad
Case
Corsair 750D
Operating System
Microsoft Windows 10 Pro 64-bit
Monitor
Acer XB271HU
Keyboard
Microsofte Natural Ergonomic 4000
Mouse
Logitech G502
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Last edited by Barefooter; 06-30-2019 at 11:50 AM.
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