The Radeon 7850 is an overclocking beast

[sberganini]

Hey, thanks for all the good advice, I appreciate it. Yes, you pegged me ... I'm a novice when it comes to overclocking. So, you suggest I follow standard overclocking procedures but get the best I can at stock voltage, then and only then explore further advantage of changing the voltage. I am surprised you don't think it is a good idea to add some heatsinks, especially to the VRM chips. My understanding is that these are the most delicate and most sensitive components to thermal damage since they are not cooled at all by the on-board cooling system. I would think the addition of small heatsinks would be a simple, but effective upgrade.

 

[neonguy]

1.
you void your warranty

2. being a novice .....yeahhh NO

3. it was desighn to work with no heatsinks.
unless you are a die hard oc , and need to squeeeze that last 40mhz out, you add heatsinks all over the place.. so....NO

4. You lack mad skills how to add heatsinks and still make it look like you never did in case you need to rma it.

5. YOU VOID YOUR WARANTY


STAY WITH STOCK OC AND MAKE NO MODIFICATIONS WITH HEATSINKS.. iAM RUNING 1250 MHZ ON MY HD7850 AT 1.210V HAVENT
ADDED HEATSINKS TO VRM AT ALL. THEY DONT GET THAT HOT. ALSO I ADDED RAM SINKS , DIDNT HELP AT ALL ON OC ..
CLOCK TO 1050/1300 ONSTOCK VOLTS AND TWEAK FAN PROFILE.. THEN IF STABLE COME BACK AND WE WILL ADD VOLTAGE. YOU HAVE A 80%-90% CHANCE OF 1200 ON THE CORE. thats gtx580 performance.

 

[Salamander]

Thanks. I just received my Sapphire HD 7850 (non overclocked). I've read several posts here about installing small heatsinks on some of the components on the PCB, such as VRM. Are these the small, finned heatsinks (say 15 mm x 15 mm) often sold on e-bay? If so, what is the procedure for temporarilly removing the dual-fan shroud (not the GPU heatsink itself) to expose the PCB surface? I took a look at my card and can't see any obvious approach.

Where did you get it from? On NewEgg it's out of stock and says it may be discontnued.

 

[Protomize]

Here's a helpful video on how to overclock your HD 7850: http://www.youtube.com/watch?v=FmEkwV7ec0s

 

[sberganini]

I ordered it from Amazon.com last Thursday and it arrived today. I've noticed quite a few posts where people are buying their 7850's from NewEgg and TigerDirect. But, Amazon seems to always have the best price and availability. Plus, their return policy is unbeatable ... absolutely no hassle, ever! Over the past few years I have built several PCs for myself and friends. Almost always Amazon has the best prices and the best selection.

 

[neonguy]

that video is ok but he doesnt really say anything except what his card runs at max oc.
if you try to set your card at his max it might not work or need less volt.
start at 1050/1300 then if no lockups . set v to 1.2v and try 1100/1300 then test.
asumming your fan is set up so it really kicks in at 60c and contnius so card doesnt go above 70c or so. now try 1150/1300, test, then 1200/1300 at 1.2v and so on.
my card maxs at 1250/1375 1.210 v yours might need more or less volt. and it may not even be bale to hit 1200 mhz at 1.25 v if its a sucky chip.
i try to keep around 1.2v no more unles your card is a good oc'r and it has good cooling.

 

[sberganini]

that video is ok but he doesnt really say anything except what his card runs at max oc.
if you try to set your card at his max it might not work or need less volt.
start at 1050/1300 then if no lockups . set v to 1.2v and try 1100/1300 then test.
asumming your fan is set up so it really kicks in at 60c and contnius so card doesnt go above 70c or so. now try 1150/1300, test, then 1200/1300 at 1.2v and so on.
my card maxs at 1250/1375 1.210 v yours might need more or less volt. and it may not even be bale to hit 1200 mhz at 1.25 v if its a sucky chip.
i try to keep around 1.2v no more unles your card is a good oc'r and it has good cooling.

Thanks again. I'll post my results after I play with it for a few days.

 

[neonguy]

I have great cooling. on my diamond hd7850

 

[KingFatty]

Neonguy, did your computer turn itself inside-out? Is that how... how did you do that?

 

[sberganini]

neonguy uses a special cooling mixture ... check out the lower right corner! ...

 

[neonguy]

deceased

 

[pandemonium]

Haha. With how big those radiators are, you may as well just build that into a windowed A/C unit so all the exhaust heat goes directly outside.

 

[neonguy]

died

 

[legcramp]

This is on 1210/5500/1180, max temps of 72oC, so very happy camper

I moded my 7850 seen here
http://hardforum.com/showthread.php?t=1703948
stock heat sink oc 1225/5400 1.195v
haven't tried oc yet with new heatsink yet, just temp testing., 30c cooler with new heatsink

Can someone explain this to me? I am getting results similar to zijin with 1200/5500 but neonguy's core is 15mhz higher but 100 less on the memory yet his fps is WAY higher?

 

[Silverforce11]

Unigine doesn't show OC on the CPU, not directly comparable, just within the ballpark.

 

[Protomize]

Can someone explain this to me? I am getting results similar to zijin with 1200/5500 but neonguy's core is 15mhz higher but 100 less on the memory yet his fps is WAY higher?

I also get a higher FPS than you with lower core and memory clocks. My CPU is a i5-3450.

 

[Arkadrel]

Can someone explain this to me? I am getting results similar to zijin with 1200/5500 but neonguy's core is 15mhz higher but 100 less on the memory yet his fps is WAY higher?

You know how when you change FSB via overclocking, the FSB : RAM ratio changes?
I believe its the same thing here, there is a "once you go over this mhz, ram goes to new ratio to not blow up".

Basically when you increase the mhz speed on the ram too much, something else gives, or a ratio is changed and your actually running slower clocks.

This isnt just a issue with the AMD cards, I believe all the GDDR5 ram work this way, and older generations of cards have had the same issue. So Nvidia cards experiance this too.

You just have to find the sweet spot, most likely the guy running 5500+ mhz on the ram has gone to high.

 

[neonguy]

dead

 

[BallaTheFeared]

I have great cooling. on my diamond hd7850

Is there really a tub of ice cream and candy wrappers just laying on your floor?

Unigine doesn't show OC on the CPU, not directly comparable, just within the ballpark.

One has 4xAA the other has no AA, cpu makes very little difference in Heaven it's a gpu test that does a good job staying gpu bound for the most part.

 

[neonguy]

No it just looks that way. these are not the candy wrappers your looking for ......[waves hand using the force]

It fell from m desk when arranging everything. trying to be funny ?
if you are clean freak or have ocd and it disturbs your calm i can upload a better pic with no ice cream bucket or candy wrapper.
i really think you should save your talking smack for obama...

 

[legcramp]

is your ram oc'd on the card ?
verify settings are same as me,
reload drivers or
maybe your hitting ovp and card is downclocking..
go into amd properties and set ovp to +15 or +20 % then try heaven again


I have had a asus p8p67
3570k oc to 4.5
1600 mhz ram 9-9-9-24
if setting are same on heaven than i dont know why your ggetting less fps.. should bout the same..

Thanks! I just noticed one run has AA and the other has no AA.... I am silly lol

 

[toyota]

No it just looks that way. these are not the candy wrappers your looking for ......[waves hand using the force]

It fell from m desk when arranging everything. trying to be funny ?
if you are clean freak or have ocd and it disturbs your calm i can upload a better pic with no ice cream bucket or candy wrapper.
i really think you should save your talking smack for obama...

well I noticed that along with other disgusting stuff when looking through your pics but did not say anything yesterday. if you are going to post pics of a ghetto setup in filthy conditions then be prepared for comments that you may not like.

 

[neonguy]

dead

 

[SickBeast]

Oh man...

With over 67,000 views I don't think this thread can make it much further.

 

[chimaxi83]

Post 1000, just cuz