ATI Radeon HD 4800 Series Fan Hacking Guide

Dashken · 9th Sep 2008, 06:16 PM

As everyone already knows by now, the ATI Radeon HD 4800 series of graphics cards is fast. REALLY fast. As a result, the prices of competing NVIDIA graphics cards have fallen so fast that the folks at Santa Clara are still nursing their nose bleeds.

However, users of the NVIDIA graphics cards have one advantage - it is actually easier to overclock the NVIDIA graphics cards. ATI not only restricts the amount of overclocking that can be performed, they also failed (intentionally?) to include the option to adjust the fan speed.

In this guide, we will show you how to hack the fan speed of a Radeon HD 4800 series graphics card so that you can ramp it all the way up!

Link : ATI Radeon HD 4800 Series Fan Hacking Guide

Lacus · 10th Sep 2008, 03:09 PM

hmm, should we actually added the bios modification too? since it helps lower down the core/mem so the idle temp should be lower..was suppose to post this but then..too many assignments T_T

Adrian Wong · 10th Sep 2008, 03:18 PM

Quote:

Originally Posted by Lacus

hmm, should we actually added the bios modification too? since it helps lower down the core/mem so the idle temp should be lower..was suppose to post this but then..too many assignments T_T

Are you referring to the 2D clock speeds? Or the BIOS mod for the fan?

The_YongGrand · 13th Sep 2008, 12:55 AM

I have a 4850 Sapphire. With a different set of cooler.

The strange thing in GPUZ is, the FAN speed is always 1RPM. I could catch a glimpse of the fan speed rating before that, it was like 3000. Then it becomes 1 all the time. But it is still running at that speed, judging by the smooth whirring sound.

Should I need to look into that? So far so good. The gpu temps are like 50 degrees C constant.

Adrian Wong · 13th Sep 2008, 01:22 AM

Quote:

Originally Posted by The_YongGrand

I have a 4850 Sapphire. With a different set of cooler.

The strange thing in GPUZ is, the FAN speed is always 1RPM. I could catch a glimpse of the fan speed rating before that, it was like 3000. Then it becomes 1 all the time. But it is still running at that speed, judging by the smooth whirring sound.

Should I need to look into that? So far so good. The gpu temps are like 50 degrees C constant.

GPUZ probably could not detect the fan speed properly. You can try using RivaTuner to check the fan speed.

Chai · 13th Sep 2008, 09:00 AM

Maybe the fan is too slow to register?

Lacus · 14th Sep 2008, 02:54 AM

nah, his 4850 is using 2pin connector which usually don't have speed sensor.and yeah, i was reffering to 2d clock

. So even using other application the speed will be the same..it happen to me too on my old 3870

(as in speed always shows at 1%)

Adrian Wong · 14th Sep 2008, 07:42 PM

Quote:

Originally Posted by Lacus

nah, his 4850 is using 2pin connector which usually don't have speed sensor.and yeah, i was reffering to 2d clock

. So even using other application the speed will be the same..it happen to me too on my old 3870

(as in speed always shows at 1%)

Ahh.. Counting on you to write that mod!

But hmm.. I think we can mod CCC to reduce the 2D speed too, right?

The_YongGrand · 15th Sep 2008, 12:35 AM

Quote:

Originally Posted by Lacus

nah, his 4850 is using 2pin connector which usually don't have speed sensor.and yeah, i was reffering to 2d clock

. So even using other application the speed will be the same..it happen to me too on my old 3870

(as in speed always shows at 1%)

After installing + deploying, I could see the RPM - it's some 3000... then hours later it becomes 1RPM. I dunno why that sensor is so fickle.

Lacus · 15th Sep 2008, 03:32 AM

the bios fix? nope..just some application will do

just need to open ccc to check if the correct 2d clock is being display and if not mistaken, this only applies to 4850 cards

9th Sep 2008, 06:16 PM	#1 (permalink)
Dashken Administrator! Join Date: 21 Apr 2003 Location: Penang Posts: 30,227 Reputation: 2352 Rep Power: 60	ATI Radeon HD 4800 Series Fan Hacking Guide As everyone already knows by now, the ATI Radeon HD 4800 series of graphics cards is fast. REALLY fast. As a result, the prices of competing NVIDIA graphics cards have fallen so fast that the folks at Santa Clara are still nursing their nose bleeds. However, users of the NVIDIA graphics cards have one advantage - it is actually easier to overclock the NVIDIA graphics cards. ATI not only restricts the amount of overclocking that can be performed, they also failed (intentionally?) to include the option to adjust the fan speed. In this guide, we will show you how to hack the fan speed of a Radeon HD 4800 series graphics card so that you can ramp it all the way up! Link : ATI Radeon HD 4800 Series Fan Hacking Guide __________________ \| Intel Core 2 Duo E6850 @ 3.2Ghz \| ASUS P5B-E Plus \| G.SKILL 2x1GB DDR2 800 \| 6 HDDs (2TB+ only ) \| NVIDIA GeForce 7600GT \| Dell E248WFP 24" Widescreen \| \| Intel C2Q Q9450 \| MSI P45 Neo3-FR \| 2 x 2GB OCZ DDR2 PC2-6400 Gold Edition \| 1 x Seagate 250GB HDD \| 2 x Seagate 750GB HDD \| 3 x Seagate 1TB HDD \| NVIDIA GeForce 9500GT \| Cooler Master CM690 chassis \| Cooler Master eXtreme Power Plus 550W PSU \| Dell E248WFP 24" Widescreen \| Windows 7 Ultimate x64 \| Blog : Dashken's I-Blog Gallery : Dashken's I-Paintings

10th Sep 2008, 03:09 PM	#2 (permalink)
Lacus Super Active Join Date: 28 Mar 2008 Location: Some gundam factory o.o Posts: 1,302 Reputation: 180 Rep Power: 4	hmm, should we actually added the bios modification too? since it helps lower down the core/mem so the idle temp should be lower..was suppose to post this but then..too many assignments T_T __________________ GUNDAM 00[Intel Xeon E3110 E0 Stock\|Asus Rampage Maximus Formula (Rampage Bios Mod)\|Gigabyte HD4850 512MB GDDR3+T-Rad2\|4x2gb DDR2 1000Mhz OCZ SLI-Ready Edition\|Western Digital WD6400AAKS 640GB\|Creative X-FI XtremeMusic\|Creative Inspire P5800\|Silverstone Strider ST56F\|Acer X233H\|Keyboard=Microsoft Sidewinder X6\|Logitech MX518\|Lian Li PC-7YCF]

13th Sep 2008, 12:55 AM	#4 (permalink)
The_YongGrand Hyperactive Join Date: 12 Feb 2005 Location: Somewhere in 甲洞... Posts: 2,726 Reputation: 1144 Rep Power: 18	I have a 4850 Sapphire. With a different set of cooler. The strange thing in GPUZ is, the FAN speed is always 1RPM. I could catch a glimpse of the fan speed rating before that, it was like 3000. Then it becomes 1 all the time. But it is still running at that speed, judging by the smooth whirring sound. Should I need to look into that? So far so good. The gpu temps are like 50 degrees C constant. __________________ Intel Core 2 Duo E7200, 2GB DDR2-667 RAM, Gigabyte 945GCMX-S2, Sapphire ATi Radeon HD4850 512MB DDR3 Intel Pentium Dual Core E2140, 2GB DDR2-667 RAM, Asus P5B-E Plus, nVidia Geforce 7950GT 512MB DDR3

13th Sep 2008, 09:00 AM	#6 (permalink)
Chai Administrator Join Date: 6 Oct 2002 Location: Maranello Posts: 27,870 Reputation: 4630 Rep Power: 81	Maybe the fan is too slow to register? __________________ Chai (Contributor & Forum Admin) http://www.techarp.com/

14th Sep 2008, 02:54 AM	#7 (permalink)
Lacus Super Active Join Date: 28 Mar 2008 Location: Some gundam factory o.o Posts: 1,302 Reputation: 180 Rep Power: 4	nah, his 4850 is using 2pin connector which usually don't have speed sensor.and yeah, i was reffering to 2d clock . So even using other application the speed will be the same..it happen to me too on my old 3870 (as in speed always shows at 1%) __________________ GUNDAM 00[Intel Xeon E3110 E0 Stock\|Asus Rampage Maximus Formula (Rampage Bios Mod)\|Gigabyte HD4850 512MB GDDR3+T-Rad2\|4x2gb DDR2 1000Mhz OCZ SLI-Ready Edition\|Western Digital WD6400AAKS 640GB\|Creative X-FI XtremeMusic\|Creative Inspire P5800\|Silverstone Strider ST56F\|Acer X233H\|Keyboard=Microsoft Sidewinder X6\|Logitech MX518\|Lian Li PC-7YCF]

15th Sep 2008, 03:32 AM	#10 (permalink)
Lacus Super Active Join Date: 28 Mar 2008 Location: Some gundam factory o.o Posts: 1,302 Reputation: 180 Rep Power: 4	the bios fix? nope..just some application will do just need to open ccc to check if the correct 2d clock is being display and if not mistaken, this only applies to 4850 cards __________________ GUNDAM 00[Intel Xeon E3110 E0 Stock\|Asus Rampage Maximus Formula (Rampage Bios Mod)\|Gigabyte HD4850 512MB GDDR3+T-Rad2\|4x2gb DDR2 1000Mhz OCZ SLI-Ready Edition\|Western Digital WD6400AAKS 640GB\|Creative X-FI XtremeMusic\|Creative Inspire P5800\|Silverstone Strider ST56F\|Acer X233H\|Keyboard=Microsoft Sidewinder X6\|Logitech MX518\|Lian Li PC-7YCF]

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