ATI HD 4850 Overclocking and HD 4890 and HD 4770

jmke · 6th June 2009, 13:52

What's the average OC on the HD 4850 ?
stock GPU 625Mhz... on air, how high will it go...on average?

6th June 2009, 23:30

There's so many different revisions on the 4850, its hard to tell.
Older revisions were able to do around the 730 range. The latest ones do or come (factory overclocked) around 680, like the Asus TOP 4850

EDIT: I ordered an HIS 4850, stock 625MHz/993 got it to 690/1050 Furmark stable
Make that 720/1100

jmke · 7th June 2009, 00:19

Testing an Asus 4850 Matrix here; running 800Mhz GPU stable; maxed out CCC as well as Asus's own utility; using GPUtuner to go past the 800Mhz mark, stability test prove 805Mhz doable, but not much higher

jmke · 13th June 2009, 15:01

Asus HD 4890 up next, currently stress testing 990Mhz on the GPU, default is 850Mhz.. crazy OCs in my humble opinion

blind_ripper · 14th June 2009, 08:58

omg that matrix 4850 pcb disign is made for dual pci-e 6pin

.
got a ATI disign pcb here, think i can do 800+ core 2 with voltmod though.

jmke · 14th June 2009, 15:05

Gigabyte HD 4770 reference clock 750 up to 900+Mhz at the moment... stock cooling
edit: 910Mhz on GPU

, no voltmods

jmke · 14th June 2009, 16:42

best to check with Alphacool

Massman · 14th June 2009, 17:09

Quote:

Originally Posted by jmke

Gigabyte HD 4770 reference clock 750 up to 900+Mhz at the moment... stock cooling
edit: 910Mhz on GPU

, no voltmods

4770's are animals indeed

jmke · 14th June 2009, 21:30

had to drop down to 890Mhz for game stable; 910 is doable for bench

6th June 2009, 13:52	#1
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	ATI HD 4850 Overclocking and HD 4890 and HD 4770 What's the average OC on the HD 4850 ? stock GPU 625Mhz... on air, how high will it go...on average? __________________

6th June 2009, 23:30	#2
damian Posts: n/a	There's so many different revisions on the 4850, its hard to tell. Older revisions were able to do around the 730 range. The latest ones do or come (factory overclocked) around 680, like the Asus TOP 4850 EDIT: I ordered an HIS 4850, stock 625MHz/993 got it to 690/1050 Furmark stable Make that 720/1100 Last edited by damian : 7th June 2009 at 00:17.

7th June 2009, 00:19	#3
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	Testing an Asus 4850 Matrix here; running 800Mhz GPU stable; maxed out CCC as well as Asus's own utility; using GPUtuner to go past the 800Mhz mark, stability test prove 805Mhz doable, but not much higher __________________

13th June 2009, 15:01	#4
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	Asus HD 4890 up next, currently stress testing 990Mhz on the GPU, default is 850Mhz.. crazy OCs in my humble opinion __________________

14th June 2009, 08:58	#5
blind_ripper Member Join Date: Apr 2005 Posts: 1,338	omg that matrix 4850 pcb disign is made for dual pci-e 6pin . got a ATI disign pcb here, think i can do 800+ core 2 with voltmod though. __________________ http://www.hwbot.org/signature/u5776.png

14th June 2009, 15:05	#6
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	Gigabyte HD 4770 reference clock 750 up to 900+Mhz at the moment... stock cooling edit: 910Mhz on GPU , no voltmods __________________ Last edited by jmke : 14th June 2009 at 15:18.

14th June 2009, 16:42	#7
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	best to check with Alphacool __________________

14th June 2009, 21:30	#9
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	had to drop down to 890Mhz for game stable; 910 is doable for bench __________________