• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

I got new Sapphire 4870 Toxic 1GB how much I can safely underclock it?

Y

Yoghurt

Junior Member
Hello everyone, I am new one here.

My question may sound weird but my Sapphire Radeon Toxic temperatures are quite high on idle (62 c) and I don't know how much it is on load but I've seen it's temperature as high as 70 after load.

I could make it cooler turning my Antec P182 fans to medium or high revs but is would cause more noise and I hate noise.

Some backgound information:

I actually never bought Toxic edition of Sapphire but my previous Sapphire 4870 1 GB failed and I got this overclocked version what seller offered to me.

My PSU is also quite small: Antec NeoHe 430 so that's partial reason why I want it underclocked.

Currently I also don't have any new games (Oblivion and hitman:bloodmoney are newest) so I don't need best possible performance from my computer.

It looks like I can underclock it via CCC so what kind of values I can type in those fields? GPU Clock is now 810MHz and memory is 1000MHz, can I underclock memory to 500MHz without stability issues?

(starting to play with CCC now)

Okay I noticed that if I enable manual fan I can drop temperatures to 45 degrees and hold it, in idle, with 20% of max revs. Now I just have to wonder why on auto mode it won't use fan at all before temperature rise to about 70 degrees.

 
You would have to test it yourself to see how much you could underclock it. It probably varies somewhat between cards. I recommend not using the auto fan control and setting it manual.
 
Use Ati Tray tools, like I do. Make yourself two profiles: one is with the 810/1000 clocks, for gaming and the second one with, lets say 450/600 ( you can go even lower) and decrease the voltage for the second,to 1.083V. This idle profile will greatly reduce your power consumption of the card. With 450/600 mhz my card idles at 39 C with the fan at 900 rpm ( the minimum ). It's dead silent and very cool too.

If you want to underclock the card under load because your PSU is too weak, then pardon me, but that is so very silly. If you don't want to buy another PSU then just sell this card and get a 4850 or whatever. And a 4870 at 85 C is not a warm card. 😉
 
Thanks for replying dguy6789 and error8.

Via CCC Ati overdrive I was able to underclock my Sapphire to 500/500 (not under but this is sufficient) clocks but I don't know how can I decrease voltage ??? There was no any similar bar to do it than there was for clocks.

This profile thing was very good news for me! I created two profiles named Idle and Load. Very good thing was that I got desktop shortcuts to activate these profiles quickly.

 
Originally posted by: OCguy
Why does 70C worry you?
Click to expand...

Might be comparing it to CPU temperature levels.
70c for load isn't too bad, and the GPU should underclock itself at idle anyway to reduce power consumption. The reason idle temps don't drop as low as they could is because it also drops the fan speed.

Even temperatures in the 80's aren't too much to worry about for a GPU, even though they would kill a CPU.
 
If you want to underclock the card under load because your PSU is too weak, then pardon me, but that is so very silly. If you don't want to buy another PSU then just sell this card and get a 4850 or whatever.
Click to expand...

Ofcourse I meant this for temporary solution for few weeks or as long as I don't have any newer games. As I said before I didn't buy over clocked Radeon but my normal Radeon 4870 died and they sent me new one which was overclocked (I didn't pay anything). I don't need that extra performance to anything for a few years, probalby, so I am not going to sell the old one and buy some cheaper Radeon (It's really not worth it and I would lose even more money than this way).
 
Ok, I guess 70 isn't bad then. Like Lonyo said it's high compared to CPU temps and I thought that GPU temps should be less therefore. I am very new to these hardware things because I am just a programmer. In december I bought my first computer that was in parts, not preaccumulated / preassembled (I don't know the correct term to that because I can't speak english) and put parts together. Before I had Laptops but I kind of frustrated to these things and wanted some change.
 
Originally posted by: Yoghurt
If you want to underclock the card under load because your PSU is too weak, then pardon me, but that is so very silly. If you don't want to buy another PSU then just sell this card and get a 4850 or whatever.
Click to expand...

Ofcourse I meant this for temporary solution for few weeks or as long as I don't have any newer games. As I said before I didn't buy over clocked Radeon but my normal Radeon 4870 died and they sent me new one which was overclocked (I didn't pay anything). I don't need that extra performance to anything for a few years, probalby, so I am not going to sell the old one and buy some cheaper Radeon (It's really not worth it and I would lose even more money than this way).
Click to expand...

The overclocked version you've got from the seller probably consumes somewhere around 5 Watts more then the normal card, so don't worry about that.

Your temps are fine and everything is great, except that PSU which is a bit too weak, but it will probably handle the load just fine, if you don't have a very power hungry system.
 
Yeah I guess my NeoHe should handle it even in full load just barely. I don't have anything else than basic things like memory (8GB) hard disk (750GB) and DVD-RW.

Btw I think that Toxics maximum memory frequency should be around 4000 MHz but CCC gives only 1200 to max option. What's the point?
 
Originally posted by: Yoghurt
Yeah I guess my NeoHe should handle it even in full load just barely. I don't have anything else than basic things like memory (8GB) hard disk (750GB) and DVD-RW.

Btw I think that Toxics maximum memory frequency should be around 4000 MHz but CCC gives only 1200 to max option. What's the point?
Click to expand...

The memory transfer rate is effectively 4x the clock rate, so the 1200MHz you see in CCC would actually equal 4800MHz because it can transfer data 4 times per clock, so while there may be 1200 clocks there's 4800 clocks worth of data.

If the speed is 4000MHz then CCC should show 1000MHz as the memory speed.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top