Max volts for underwater CPU and gpu 24/7

chris-82

chris-82

chris-82

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I have a i5 2500k currently at @4.5 @1.372v and my 7950 @1150/1450 @1.225v
CPU doesn't go above 42-43c
Gpu doesn't go above 38-40c.
I'm not currently at my pc but I'm damn sure its these temps or very very close to this.
I have this all under water rasa CPU block,sr1 560 radx4 cougar 140mm fans,aqua computer 7950 block,d5 with ek top,bay res.

My question is what's the safe volts for 24/7 use on a
i5 2500k on water?
7950 on water?

And what's the safest(ish) max volts for benchmarking runs on:
I5 2500k on water?
7950 on water?

This obviously is taking into acount that temps are safe.
What would be considered safe temps on the highest max volts benchmarking below 70 or?

On a different note I'm currently running mayhems dye in my loop and have heard it stains blocks and am tempted to change to coloured tubing and just use non dye'd coolant but what I wonder is:
Can u still see the bubbles in the water when u need to bleed the system?
What does the coloured tubing look like compared to clear and dye?

When cleaning out the gpu block do people remove the block from the gpu or? As I see the only safe way to clean it would be to remove the block or do people do it when mounted to the gpu?

I also hear using tomato ketchup is a good way to clean the blocks is this true?


Thankyou in advance for any help/feedback
 
You'll be fine benching 1.5v cpu & what ever the max volts on gpu are available which is probably around 1.3v.

Safest temps I like to stay a good 10c under tjmax for bench runs, you won't get anywhere near a temp limit on the gpu:)

For block cleaning it depends how messy they are, I usually get away with just a flush of de-ionised water, though ketchup and a toothbrush do get mentioned for a good scrub.
 
Thanks for the quick reply pgi947 for the quick reply.do you think my 24/7 clocks and volts seem okay or could I push for more? Or realistically will there be no benefit other than epeen?(regarding gaming performance)
 
You could easily push for more on a 24/7 clock, iirc Intel's max limit was something like 1.42v, so you have plenty of room even for that limit. Need it or not? That's your choice :)
 
Thanks for all the info pigi one last thing what's the safe volts I can push through the gpu for 24/7 running? Or am I pretty much there already?
Have also never played with the memory volts on the 7950 what's the max volts for 24/7 on them and also what's max volts for them benching?
I have been reading though that u reall don't get any benefit from upping the memory to much though what's your thoughts on that?

Thankyou for the help,I know this all gets asked a lot so appreciate it
 
7950 memory generally doesn't clock as well as 7970 memory, though you should be fine running 1.625v on the memory to hit ~1600mhz if required.

As for core voltage, Ghz/Boost cards run at 1.256v stock, so you'll manage that 24/7 easily and should probably take you north of the 1200mhz mark.
 
On AB the Mem slider goes up to 1.7v which when im benching i use, this gives me well over 1900 mhz on my memory, but most of the time i dont notice any difference overclocking it by this amount only really in Heaven, so i normally just stick with 1200/1600 as it doesnt require any voltage increase.
 
1900mhz with a 7950?! Damn, very nice :D
My 7970s used to get lower scores with anything higher than 1800mhz memory regardless of voltage, always thought it was memory correction.

Either way, max sliders on the GPUs is safe 24/7 especially underwater as you'll never really have a problem with temperatures.
 
1900mhz is pretty good, though I wouldn't be all too keen running 1.7v through them even on water 24/7, benching should be fine though. As tonester pointed out, try moving that clock down to 1800 and then raise + test, rinse and repeat until you see the scores drop off, you'll start hitting memory correction anywhere between 1800-2000mhz on 7900 memory. Best 7970 I had would do 1970mhz, worst was 1820mhz.
 
thanks for all the advice its been massively helpful.
i have been tweaking away and so far have done this(all done on heaven 4.0 quality ultra,tesselation extreme,anti alising x8,1920x1080):

memory first:

1600mhz no voltage tweak
fps:31.6 score:795
min:15.5 max:67

1700mhz 1.6v
fps: 31.8 score:802
min:17.3 max:68.3

1750mhz 1.6v temps vrm: 51c and 54c max
fps:32 score:805
min:15.9 max:67.9

1780 1.6v temps vrm: 52 and 55c max
fps: 32 score:807
min: 15.2 max:68.6

tried 1780 with a little voltage bump to see if it made a difference:
1780 1.606v
fps:32.1 score: 808
min:17.5 max:68.5

have not pushed further as it crashed beyond this and would need more volts to go higher and this is more for 24/7 use

then to the core:

1200 @ 1.238v max temp 37c
fps: 37.5 score: 944
min: 19.5 max: 79.9

1250 @ 1.281v max temp 38c
fps: 38.4 score: 968
min:19.4 max:82.0

same core but with a little voltage to see if anything changed:

[email protected] max temp 39c
fps:38.5 score: 969
min:19.6 max 81.2


then a run on full clocks core and memory(had to tweak the volts to make this work)
core [email protected] max temp 40c
memory [email protected] max temp 67c
fps: 41.6 score:1048
min: 19.7 max:90.6

does the above look okay to run 24/7 if stable in game or is there something u would change/worry about? should i lower the memory oc or? are the volts on the core going to be okay 24/7 and memory?

thanks again chris
 
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