System Light Dark

xentr_theme_editor

xentr_page_setup xentr_appearance xentr_sidebar

  • xentr_page_width

    xentr_toggle_page_width

    xentr_page_width_description

    xentr_color_pickers

    xentr_toggle_color_picker

    xentr_toggle_color_picker_description

    xentr_typography

    xentr_select_the_font_you_want_to_use

    xentr_node_layout

    xentr_grid_layout

    xentr_grid_layout_description

  • Style variation

    xentr_select_the_style_variation_you_want_to_use
    System Light Dark

  • xentr_sidebar

    xentr_toggles_sidebar

    xentr_sidebar_description

    xentr_sticky_sidebar

    xentr_sticky_sidebar_description
    xentr_sidebar_position
    Left
    Right
  • Please do not post any links until you have 3 posts as they will automatically be rejected to prevent SPAM. Many words are also blocked due to being used in SPAM Messages. Thanks!

Radeon 5970 Overclocking: The VRM Temperature Bottleneck @ AnandTech

geokilla

geokilla

Well-known member
Joined
Aug 11, 2008
Messages
3,816
Reaction score
6
Location
Toronto
xentr_thread_starter
AnandTech

So it seems that the 5970 can clock even higher if the VRM temperatures can be lowered. That thing must put out a ton of heat.
 
Doesn't help that each core in the 5970 doesn't come with "full" VRM banks making each individual phase work harder.
 
Doin some testing on mine today and noticed Crysis studdering from time to time. I did a furmark test and sure enough, my GPU1 throttles back after a few minutes.

Looks like its time to watercool.
 
This could also be by Far Cry 2 shows somewhat lackluster performance results.

Oh, and its not only overclocking: people are being held back @ stock clocks / voltage as well.
 
xentr_thread_starter
Seems that the stock cooler isn't do its job very well, despite it having a vapour chamber in there. And here some thought the 5970 wasn't doing too well cus of crappy drivers.
 
geokilla said:
Seems that the stock cooler isn't do its job very well, despite it having a vapour chamber in there. And here some thought the 5970 wasn't doing too well cus of crappy drivers.
Click to expand...
The problem seems to be that the GPU1 VRMs aren't actually being cooled by the vapour chamber. The GPU2 VRMs are being cooled by it and have much lower temps.
 
geokilla said:
Seems that the stock cooler isn't do its job very well, despite it having a vapour chamber in there. And here some thought the 5970 wasn't doing too well cus of crappy drivers.
Click to expand...

The cooler does its job just fine, its the second set of VRM's that aren't even connected to the main heatsink assembly thats the issue.

Kind of a silly oversight in my mind.
 
Well I did a little testing and its only one card
GPU 1 and 2 5970
GPU 3 285GTX

Max temp on core with extreme burning mode was 80.5 C
Max temp on Vram was 99C extreme burning mode can do upto 120 before it effects anything.

Now this is my card and how it runs on extreme burning mode.
My advice turn up fan speed and for any gamer this will not be an issue.



Heres the screen shots.



link to higher quality screen
 
So many conflicting reports on the whole downclock/won't oc "well" thing =\ . Perhaps water is the way to go on these things.
 
You must log in or register to reply here.

Latest posts

xentr_legal_notice_title

xentr_legal_notice_description

Back
Top