The 4890 Overclocking Thread.

[Candymancan21]

Just wanted to make a thread so people can post there highest stable overclocks on there 4890's. Curious to see what the average is

I'v managed 960 core and 1150 memory on my sapphire card with the fan on auto. Ran crysis all day long for 3 days without any problems. Tried 1000core but it locks up instantly when i launch the game, and 1200mhz memory gives artifacts

 

[Sylvanas]

Raising the voltage is a guaranteed 1ghz 99% of the time, tried it?

 

[error8]

Use GPU-tool to test for artifacts.. I'll bet that it fails at 960 mhz.

 

[Candymancan21]

No i havent, how do i do that ? How high should you really raise the voltage anyway ? My core temps are reaching 80c right now

 

[Candymancan21]

and in GPU tool you want me to hit test for stability how long should i run it for ? If it doesnt fail at crysis which runs the core at 100% i doubt i would fail anything else

 

[*kjm]

I/have mine at 960/1015 and it runs all my games with out problems. I have not tried for the top end..... this is what others said they were getting so I started at this speed and I'm happy so why push it I have been running it at this speed for almost a month.

BTW it is a XFX.

 

[Candymancan21]

Originally posted by: error8
Use GPU-tool to test for artifacts.. I'll bet that it fails at 960 mhz.

K i have been running the gpu-tool for about and hour now, and at 1100mhz memory its fine, but 1150 it fails. The core didnt have problems at 960 tho and failed at 975. Temps got to 79c, and 93c for the PWM. Fan was on auto and running about 38%. Its amazing how hot these cards run if you touch it you cant hold you fingers on it for more then 2 seconds. Even putting the fan on 50% only lowers temps by like 5c.

Almost makes me want to buy a full cover waterblock and hook it up to my watercooling system, once i upgrade the radiator and pump later.

 

[error8]

If you passed one hour, then it's stable. Why don't you bump the fan a bit, play with some profiles according to temperature. I think that you can squeeze more out of this card, if you put the temps to the ground. Still, 79 C is fine, but it will probably clock higher at 70 C for example.

 

[apoppin]

Originally posted by: error8
If you passed one hour, then it's stable. Why don't you bump the fan a bit, play with some profiles according to temperature. I think that you can squeeze more out of this card, if you put the temps to the ground. Still, 79 C is fine, but it will probably clock higher at 70 C for example.

one hour does not indicate stability

Diamond HD4890-XOC stock is 925/1050 - i get 960/1055
HIS HD4890 stock is 850/975 - i get 925/1050 with the VGA fan at 90% in CrossFire to keep it stable running with the Diamond 4890

and for comparison:

ASUS HD4870 - stock 750/900 gets 800/1050 and makes one hell of a partner paired with the Diamond 4890 in CrossFire-X

 

[error8]

Originally posted by: apoppin

Originally posted by: error8
If you passed one hour, then it's stable. Why don't you bump the fan a bit, play with some profiles according to temperature. I think that you can squeeze more out of this card, if you put the temps to the ground. Still, 79 C is fine, but it will probably clock higher at 70 C for example.

one hour does not indicate stability

From all the programs I have tested my card with, I can say for sure that GPU tool is the most demanding, when it comes to artifact testing. Furmark heats the card like crazy, but can run for hours, while gpu tool fails in just a couple of minutes, at the same clocks. I don't know how it works with Nvidia cards, but it's a pain in the gpu for 4XXX series.
I would say that after one hour pass, your card should be close to the perfection of stability. Maybe 90 to 100% stable.

 

[apoppin]

Only playing and benching games will tell you if a card/system is really stable or not

90% stable is very unstable in my book
:roll:

 

[Hauk]

Originally posted by: Sylvanas
Raising the voltage is a guaranteed 1ghz 99% of the time, tried it?

I notice a few of the factory OC'd cards use 8-pin+6-pin power connectors, and have read that 1.4v is kinda the magic number to reach 1GHz. Anyone know if these 8-pin/6-pin cards bios are 1.4v?

And if so, is it only the dual 6-pin cards that need a voltage tweak to approach 1GHz?

 

[SlowSpyder]

Originally posted by: apoppin

Originally posted by: error8
If you passed one hour, then it's stable. Why don't you bump the fan a bit, play with some profiles according to temperature. I think that you can squeeze more out of this card, if you put the temps to the ground. Still, 79 C is fine, but it will probably clock higher at 70 C for example.

one hour does not indicate stability

Diamond HD4890-XOC stock is 925/1050 - i get 960/1055
HIS HD4890 stock is 850/975 - i get 925/1050 with the VGA fan at 90% in CrossFire to keep it stable running with the Diamond 4890

and for comparison:

ASUS HD4870 - stock 750/900 gets 800/1050 and makes one hell of a partner paired with the Diamond 4890 in CrossFire-X

Appopin,

How is game play with the 4870 @ 800 paired with that 4890 @ 925? Do you notice any lack of smoothness? I would think that the two cards take a slight different amount of time to draw and display their respective frames... unless CF automatically downclocks the 4890 or my understanding of CF is lacking.

Feel free to PM me your thoughts, I don't want to drag this converstaion off topic. I'm just curious. Thanks!

 

[Candymancan21]

Apoppin i played crysis single player from start to finish and i didnt have any issues, no lock ups, no artifacts at 960/1100. Pretty sure between that and gpu-tool last nite its stable ,its not going to get much better then that because crysis uses 99% of my gpu and 88% of my cpu during gameplay.

How do you test for stability ?

 

[error8]

Originally posted by: apoppin
Only playing and benching games will tell you if a card/system is really stable or not

90% stable is very unstable in my book
:roll:

If you don't believe the "efficiency" of GPU tool you can try and use it yourself and see what happens. I can say for sure that GPU tool will give artifacts faster then any game out there.
I can play Crysis at 810 mhz on the core, but I can't "play" GPU tool at that clock. Of course, now it comes in mind the question: "Why should I care about GPU tool, because I don't use that daily, I only play games". Well it's just a matter of personal choice, after all.

 

[apoppin]

Originally posted by: SlowSpyder

Originally posted by: apoppin

Originally posted by: error8
If you passed one hour, then it's stable. Why don't you bump the fan a bit, play with some profiles according to temperature. I think that you can squeeze more out of this card, if you put the temps to the ground. Still, 79 C is fine, but it will probably clock higher at 70 C for example.

one hour does not indicate stability

Diamond HD4890-XOC stock is 925/1050 - i get 960/1055
HIS HD4890 stock is 850/975 - i get 925/1050 with the VGA fan at 90% in CrossFire to keep it stable running with the Diamond 4890

and for comparison:

ASUS HD4870 - stock 750/900 gets 800/1050 and makes one hell of a partner paired with the Diamond 4890 in CrossFire-X

Appopin,

How is game play with the 4870 @ 800 paired with that 4890 @ 925? Do you notice any lack of smoothness? I would think that the two cards take a slight different amount of time to draw and display their respective frames... unless CF automatically downclocks the 4890 or my understanding of CF is lacking.

Feel free to PM me your thoughts, I don't want to drag this converstaion off topic. I'm just curious. Thanks!

Click on the link in my sig. It will answer ALL of your questions about CrossFire-X and what it does - including FrankenFire scaling .. i finally got ahold of enough cards and configurations [in 13 games] to answer my own questions and see a clear pattern.

How do you test for stability ?

i play games. i have my favorites that test everything. And it is DAYS of playing and benching that tells me if a card or system is completely - 100% stable - or not.

These tools are "shortcuts" - but i would not rely on them any more than to run Prime for ten hours and then say it is a "stable" OC for my CPU.

Stability is measured against the stock product. There should be NO difference - except in speeds.

 

[Candymancan21]

Yea thats how i usually make sure if its stable or not. My first post i said i played crysis for 3 days straight running the benchmark and then beating the game and it was fine, but someone told me to run that gputool. I do the same for cpu's, i run orthos for like 4 hours and if its fine on that and gaming then its stable for all im concerned.



Anyway anyone else care to post what there overclocks were ? I see the voltage adjustments in GPUtool but to be honest the card is super hot i dunno if raising the voltage to 1.4v like some people suggested is really worth getting to 1ghz. Even with the fan speed up to unbearable noise levels its still finger burning hot.

 

[videogames101]

Originally posted by: error8

Originally posted by: apoppin
Only playing and benching games will tell you if a card/system is really stable or not

90% stable is very unstable in my book
:roll:

If you don't believe the "efficiency" of GPU tool you can try and use it yourself and see what happens. I can say for sure that GPU tool will give artifacts faster then any game out there.
I can play Crysis at 810 mhz on the core, but I can't "play" GPU tool at that clock. Of course, now it comes in mind the question: "Why should I care about GPU tool, because I don't use that daily, I only play games". Well it's just a matter of personal choice, after all.

It's different then CPU OCing, where an "artifact" is essentially a system miscalculation. With GPUs, you get an odd visual thing. If you don't notice them in games, well then it doesn't matter it's unstable, at all. (assuming it's not bsod'ing your system.)

At any rate, my HD4870 @ 65% fan

Idle: 40C
Load: 48C
(It's even cooler after dusting, think 35C/42C)

@790/1100
@stock voltage

No noticeable in-game artifacts.


Also, the stock cooler is amazing, contrary to popular belief. Also, I wear headphones, so quiet fan sounds aren't important to me.


Also, that memory OC makes all the difference for crysis and a few other games.

 

[error8]

Originally posted by: videogames101


It's different then CPU OCing, where an "artifact" is essentially a system miscalculation. With GPUs, you get an odd visual thing. If you don't notice them in games, well then it doesn't matter it's unstable, at all. (assuming it's not bsod'ing your system.)

I always put myself this question. Doesn't it really matter that artifacts are there, but you can't see them? It makes me think that this can damage the card in the long term use.

 

[Candymancan21]

Originally posted by: videogames101

Originally posted by: error8

Originally posted by: apoppin
Only playing and benching games will tell you if a card/system is really stable or not

90% stable is very unstable in my book
:roll:

If you don't believe the "efficiency" of GPU tool you can try and use it yourself and see what happens. I can say for sure that GPU tool will give artifacts faster then any game out there.
I can play Crysis at 810 mhz on the core, but I can't "play" GPU tool at that clock. Of course, now it comes in mind the question: "Why should I care about GPU tool, because I don't use that daily, I only play games". Well it's just a matter of personal choice, after all.

It's different then CPU OCing, where an "artifact" is essentially a system miscalculation. With GPUs, you get an odd visual thing. If you don't notice them in games, well then it doesn't matter it's unstable, at all. (assuming it's not bsod'ing your system.)

At any rate, my HD4870 @ 65% fan

Idle: 40C
Load: 48C
(It's even cooler after dusting, think 35C/42C)

@790/1100
@stock voltage

No noticeable in-game artifacts.


Also, the stock cooler is amazing, contrary to popular belief. Also, I wear headphones, so quiet fan sounds aren't important to me.


Also, that memory OC makes all the difference for crysis and a few other games.

The 4890 runs almost 2x warmer then a 4870 does.. In fact its more like a 4870x2 when it comes to temps. You may think the fan is fine (i assume your talking about the 4890 cooler because its the same as the 4870), but even when i have mine running at 100% the temps still reach in the upper 60's. 50% and they are are 75c, leaving it on auto reachs about 40% and temps are in the low 80's, and the vrm's reach the low to mid 90's.

The fan on the 4890 can reach 70 Decible's. I have Quiet Comfort 3 headphones which are some of the best for taking out outside noise but still..

 

[Jabbernyx]

950/1100 so far on two HIS 4890s. Need to figure out how to lower the target temps (right now max seems to be around 80C).

 

[apoppin]

Originally posted by: videogames101

Originally posted by: error8

Originally posted by: apoppin
Only playing and benching games will tell you if a card/system is really stable or not

90% stable is very unstable in my book
:roll:

If you don't believe the "efficiency" of GPU tool you can try and use it yourself and see what happens. I can say for sure that GPU tool will give artifacts faster then any game out there.
I can play Crysis at 810 mhz on the core, but I can't "play" GPU tool at that clock. Of course, now it comes in mind the question: "Why should I care about GPU tool, because I don't use that daily, I only play games". Well it's just a matter of personal choice, after all.

It's different then CPU OCing, where an "artifact" is essentially a system miscalculation. With GPUs, you get an odd visual thing. If you don't notice them in games, well then it doesn't matter it's unstable, at all. (assuming it's not bsod'ing your system.)

At any rate, my HD4870 @ 65% fan

Idle: 40C
Load: 48C
(It's even cooler after dusting, think 35C/42C)

@790/1100
@stock voltage

No noticeable in-game artifacts.


Also, the stock cooler is amazing, contrary to popular belief. Also, I wear headphones, so quiet fan sounds aren't important to me.


Also, that memory OC makes all the difference for crysis and a few other games.

it is more the core overclock that make the most difference. Once you get over 1000, it doesn't go up much after that. Now if you got 60MHz more on the core, you'd basically have a stock 4890 with a good vRAM OC

I always put myself this question. Doesn't it really matter that artifacts are there, but you can't see them? It makes me think that this can damage the card in the long term use.

Depends. If it is thermals that are causing artifacting, you are in trouble.
- For example multi-GPU issues with Cat 9-5 that causes artifacts in ET-QW no matter what the speed
- you can play it - it is just annoying as hell - and it doesn't damage anything but your eyes

 

[videogames101]

Anyone know the max safe voltage for hd4870?

 

[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

 

[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?