The 4890 Overclocking Thread.

[Eureka]

Mine only gets to about 950/1055, anything higher artifacts within 30 seconds. ;

 

[apoppin]

Originally posted by: videogames101

Originally posted by: apoppin

Anyone know the max safe voltage for hd4870?

stock .. it is the only voltage that is warrantied

It appears to me that the GPU is more fragile; or at least more prone to failure than CPUs when volt modded

warranty, haha, but seriously, anyone here fried a card yet?

several .. and only one CPU
- hence the "be aware"

9800XT, 8800GTX, HD4870 .. more if i think back

 

[Eureka]

Is bumping up the voltage really that bad? I just used GPUTool to up the VDDC voltage. Under 100% fan and 1.4V on VDDC, I can get a semi-stable OC of 1000/1090, with a pixel or two error every couple of minutes or so. Not a truly stable OC, but at least it's happening. (Not going to leave it like this, just for testing).

Also under the voltage tab there's a second slider, termed "???". What is it, the memory voltage? Increasing it only increases the number of errors I get, so I left that at stock.

 

[error8]

Originally posted by: Eureka
Is bumping up the voltage really that bad? I just used GPUTool to up the VDDC voltage. Under 100% fan and 1.4V on VDDC, I can get a semi-stable OC of 1000/1090, with a pixel or two error every couple of minutes or so. Not a truly stable OC, but at least it's happening. (Not going to leave it like this, just for testing).

Also under the voltage tab there's a second slider, termed "???". What is it, the memory voltage? Increasing it only increases the number of errors I get, so I left that at stock.

Does GPU tool voltage tweak works? Because on my card when I set it higher it goes bellow stock.

Anyway, if it's working, 1.4 V is a lot, if you are using the stock cooler! How hot does it get at this voltage?

 

[Eureka]

Originally posted by: error8

Originally posted by: Eureka
Is bumping up the voltage really that bad? I just used GPUTool to up the VDDC voltage. Under 100% fan and 1.4V on VDDC, I can get a semi-stable OC of 1000/1090, with a pixel or two error every couple of minutes or so. Not a truly stable OC, but at least it's happening. (Not going to leave it like this, just for testing).

Also under the voltage tab there's a second slider, termed "???". What is it, the memory voltage? Increasing it only increases the number of errors I get, so I left that at stock.

Does GPU tool voltage tweak works? Because on my card when I set it higher it goes bellow stock.

Anyway, if it's working, 1.4 V is a lot, if you are using the stock cooler! How hot does it get at this voltage?

The GPU Tool voltage tweak does work, it shows up in GPU-Z. And upping the voltage by a small amount does seem to benefit the card. At 1.31, I can't get above 950/1050 without the fuzzy donuts screaming yellow. At 1.35, I can hit 975/1100 pretty well. At 1.4, I get to about 1000/1175. Anything beyond that doesn't do much, after 1.45 it actually starts to artifact more.

And right now I'm using CCC's built in temperature monitor to measure my temps. Core temperature never exceeds 65C at 100% fan. Running at 50-60% fan keeps the temperature below 80C. I'm wondering if there's nothing something wrong with the monitors, its actually staying pretty cool.

And I still can't figure out that ??? thing, upping it doesn't do much.

Also, I've seen someone recommend Radeon BIOS editor to change the voltage in the card BIOS, is that safe to do? I think the GPU tweaks is session only.

 

[error8]

Originally posted by: Eureka

Also, I've seen someone recommend Radeon BIOS editor to change the voltage in the card BIOS, is that safe to do? I think the GPU tweaks is session only.

Use voltage factoyr, with the latest Riva Tuner installed and so you can set your voltage and make it stick, loading it with windows, once you boot.

 

[Candymancan21]

Seems these cards only get to about 930/950 core and 1050-1100 memory, based off what people have posted and what i read google searchs. I think all the reviews with these 1k mhz core clocks were just hand picked cards. I havent seen anyone who was able to get 1k core with the stock voltage and cooler yet. The sapphire card with the 1k mhz oc's are using the 6pin-8pin design of the card and have better coolers. Im not sure what there core voltages are running at tho, and i bet those are cherry picked RV790 core's

Me personally i wouldnt raise the core voltage. There is no point in damaging a brand new video card like this that plays every game i have at 60fps with 8AA 16AF, besides crysis. Crysis is the only game i am playing with it overclocked beyond the factory overclocks. 950/1100 gives me 3 more fps so i doubt 1k core would really be worth getting that extra 1-3fps.

 

[Eureka]

Originally posted by: Candymancan21
Seems these cards only get to about 930/950 core and 1050-1100 memory, based off what people have posted and what i read google searchs. I think all the reviews with these 1k mhz core clocks were just hand picked cards. I havent seen anyone who was able to get 1k core with the stock voltage and cooler yet.

Me personally i wouldnt raise the core voltage. There is no point in damaging a brand new video card like this that plays every game i have at 60fps with 8AA 16AF, besides crysis. Crysis is the only game i am playing with it overclocked beyond the factory overclocks. 950/1100 gives me 3more fps so i doubt 1k core would really be worth getting that extra 1-3fps

How many reviews do you find with 1ghz at stock voltages? I think most cards running at 1ghz require voltage boosts. I think that MSI does run stock voltages, but they have custom parts/circuits for that.

And you're right, remember we're talking about a 50 Mhz boost here. The safe method is to just keep it at 950. But for me, the overclock is the end in and of itself.

Just for reference, I did the GPU test in Crysis at 950/1050 and 1000/1100. The difference was exactly 1 frame.

 

[Candymancan21]

It might have to do with the 50mhz memory increase. The review i saw the other day i forgot who it was from used the card at diff frequency's to see what the results would be. At 850/1100 the diff was like 1fps. At 900/1000 the diff the was 1fps, at 950/1100 the diff was 3fps, at 1k/1000 the diff was like 2fps and so on. Or something that this anyway.

Was your 1 frame for the average or was this for high and min ? I think honestly you are just cpu limited here. I got more then 1fps from the same increase amounts you did.. My cpu on the gpu test was running at 90%

 

[Eureka]

Originally posted by: Candymancan21
It might have to do with the 50mhz memory increase. The review i saw the other day i forgot who it was from used the card at diff frequency's to see what the results would be. At 850/1100 the diff was like 1fps. At 900/1000 the diff the was 1fps, at 950/1100 the diff was 3fps, at 1k/1000 the diff was like 2fps and so on. Or something that this anyway.

Was your 1 frame for the average or was this for high and min ? I think honestly you are just cpu limited here. I got more then 1fps from the same increase amounts you did.. My cpu on the gpu test was running at 90%

It was for the average. It might be a CPU limit, but I don't think it would restrict that much. Either way, theres not much benefit to pushing it to the max.

Of course a CPU upgrade is in line, but I'm waiting until quad cores drop in price. And not everyone has your insane 4.4ghz water-cooled OC.

 

[Candymancan21]

I just did the GPU run at 930/1100, and i got 31.66 Min, 54.69 high, 42.04 average. With 950/1100 i got 32.78min, 55.64 high,42.93 average. Thats basicly 1fps from a 20 core increase. So if you got 1 fps from 50 core and 50 memory then i honestly think its because of your cpu. I cant try 1k core but i could do 900/1000 to see how far down it goes from the 950/1100


EDIT: i just ran 900/1000, my fps dropped 2 from the average min/max. But it doesnt matter 1fps here and there eh . Not worth the gpu voltage hehe. Maybe in the future but then i would probably crossfire. Hell i almost considered just using my 4850 in crossfire for crysis i get 6 more fps doing that lol. Maybe more if those 9.6 drivers give me 11% like they claim

 

[Tempered81]

Originally posted by: Candymancan21
Seems these cards only get to about 930/950 core and 1050-1100 memory, based off what people have posted and what i read google searchs. I think all the reviews with these 1k mhz core clocks were just hand picked cards. I havent seen anyone who was able to get 1k core with the stock voltage and cooler yet. The sapphire card with the 1k mhz oc's are using the 6pin-8pin design of the card and have better coolers. Im not sure what there core voltages are running at tho, and i bet those are cherry picked RV790 core's

Me personally i wouldnt raise the core voltage. There is no point in damaging a brand new video card like this that plays every game i have at 60fps with 8AA 16AF, besides crysis. Crysis is the only game i am playing with it overclocked beyond the factory overclocks. 950/1100 gives me 3 more fps so i doubt 1k core would really be worth getting that extra 1-3fps.

Your cpu is overvolted, what's the difference with applying this same logic to your gpu?

 

[Candymancan21]

Well iv always heared overvolting GPU's is bad, and i also heared they are more fragile then cpu's are. So i plan to keep that mentality. Plus my cpu isnt running at 80-90c. Its not worth the extra 50mhz core either for that 1-2 fps. I do the same for my cpu its at 4.2ghz 1.29v 24/7 which is only .04 more then stock. 4.4ghz is just the highest iv ever been able to get stable for the most part.

 

[Eureka]

Originally posted by: Candymancan21
I just did the GPU run at 930/1100, and i got 31.66 Min, 54.69 high, 42.04 average. With 950/1100 i got 32.78min, 55.64 high,42.93 average. Thats basicly 1fps from a 20 core increase. So if you got 1 fps from 50 core and 50 memory then i honestly think its because of your cpu. I cant try 1k core but i could do 900/1000 to see how far down it goes from the 950/1100


EDIT: i just ran 900/1000, my fps dropped 2 from the average min/max. But it doesnt matter 1fps here and there eh . Not worth the gpu voltage hehe. Maybe in the future but then i would probably crossfire. Hell i almost considered just using my 4850 in crossfire for crysis i get 6 more fps doing that lol. Maybe more if those 9.6 drivers give me 11% like they claim

Whoa wait a second, how are you getting a high of 55.64? What settings are you using (unless GPU test has a universal setting). My average itself is around 30 fps, but I run at 1680x1050 with everything on Very High normally.

I don't think the CPU can limit that severely, benchmarks show very little bottlenecking between the 7850 and the 940 in Crysis.

Also, where do I find this Voltage Factory program?

 

[Sylvanas]

Overvolting a GPU is no worse than overvolting a CPU. Theoretically it may reduce their lifespan and given CPUs are intended to run for 10years stock settings, personally I don't care as I upgrade faster than I'd see any degradation in the CPU (my OC'd A64 3200 is still going strong)- same for GPU. Keep temps in check as always and you'll be fine. I've read 1.4v is where most hit 1000mhz+ so it sounds like you are right on the mark.

 

[Candymancan21]

Originally posted by: Eureka

Originally posted by: Candymancan21
I just did the GPU run at 930/1100, and i got 31.66 Min, 54.69 high, 42.04 average. With 950/1100 i got 32.78min, 55.64 high,42.93 average. Thats basicly 1fps from a 20 core increase. So if you got 1 fps from 50 core and 50 memory then i honestly think its because of your cpu. I cant try 1k core but i could do 900/1000 to see how far down it goes from the 950/1100


EDIT: i just ran 900/1000, my fps dropped 2 from the average min/max. But it doesnt matter 1fps here and there eh . Not worth the gpu voltage hehe. Maybe in the future but then i would probably crossfire. Hell i almost considered just using my 4850 in crossfire for crysis i get 6 more fps doing that lol. Maybe more if those 9.6 drivers give me 11% like they claim

Whoa wait a second, how are you getting a high of 55.64? What settings are you using (unless GPU test has a universal setting). My average itself is around 30 fps, but I run at 1680x1050 with everything on Very High normally.

I don't think the CPU can limit that severely, benchmarks show very little bottlenecking between the 7850 and the 940 in Crysis.

Also, where do I find this Voltage Factory program?

I am using 1680x1050 2xAA, with High details its the settings i play the game at. Very high is unplayable i prefer my games running at 40+ fps. I changed everything to very high just now and the object quality to very high 0xAA, my average was 36. Make sure your object quality is on very high for some reason changing the settings to very high keeps that one on high.

No idea on the voltage thing. Im going to run at 3ghz stock and see what my fps is then.


Edit: Ok at 3ghz, my high stayed the same 35.5fps average was 29, but my min went down alot it dropped from 21 at 4200mhz to 11. Maybe cpu speed plays a role more in the minimum FPS instead of the maximum. What is your min fps ? Mine dropped a whopping 50% by going down 1300mhz. When going up to 4300 i gain 100% on the min 11 to 21. Thats alot lol.

 

[Eureka]

My min was around 17fps, I don't have exact numbers on me.

I'll do a retest with your settings as well. For object setting, I found you have to manually change it for it to keep, can't just hit the auto switch. It sounds like for the most part the GPU handles well, but in some areas the CPU usage gets high and that's where the min fps kicks in.