The HD 4870/50 Thread

keninishna · 07-08-08, 12:24 AM

I did the vmod and I should have 1.36v under load I don't know how people are measuring the voltage but it seems to be working and temps seem to be ok no artifacts but if I go over 860 I get them. I'll probably go up to 1.41 volts tomarrow and see if I can hit 900+ on core. I modded the bios of the card but only to regulate the fan and Im using amdgpu tool to set the clocks.

nockawa · 07-08-08, 04:18 AM

Hello guys,

I already have one 4850, and I'd like to get another one in crossfire, but I'm wondering if my PSU will be able to handle everything inside my rig.
The PSU I have is a Antec's EarthWatts 500W. You can see in my signature the rig description (mainly Q6600 G0 and 4 HDDs)...

Thanks for the advices!

reznik · 07-08-08, 05:10 AM

KENINISHNA

Quote:

did the vmod and I should have 1.36v under load I don't know how people are measuring the voltage but it seems to be working and temps seem to be ok no artifacts but if I go over 860 I get them. I'll probably go up to 1.41 volts tomarrow and see if I can hit 900+ on core. I modded the bios of the card but only to regulate the fan and Im using amdgpu tool to set the clocks

.

hats off to you mate thats awsome...hmm i wouldnt mind trying to push up my oc but how safe is the modding? did u stress test it under those speeds?

Super Nade · 07-08-08, 06:25 AM

Quote:

Originally Posted by nockawa

Hello guys,

I already have one 4850, and I'd like to get another one in crossfire, but I'm wondering if my PSU will be able to handle everything inside my rig.
The PSU I have is a Antec's EarthWatts 500W. You can see in my signature the rig description (mainly Q6600 G0 and 4 HDDs)...

Thanks for the advices!

It may turn on and run, but I would not feel comfortable to suggest it for X-Fire. I'd recommend a minimum 600W unit (a good one at that). Post a thread in the power supply forum and we can take it from there.

Quote:

Originally Posted by keninishna

I did the vmod and I should have 1.36v under load I don't know how people are measuring the voltage but it seems to be working and temps seem to be ok no artifacts but if I go over 860 I get them. I'll probably go up to 1.41 volts tomarrow and see if I can hit 900+ on core. I modded the bios of the card but only to regulate the fan and Im using amdgpu tool to set the clocks.

ken, is it a pencil mod or a hard mod? How are you reading VCore? Does any software read it accurately?

Quote:

Originally Posted by reznik

KENINISHNA
hats off to you mate thats awsome...hmm i wouldnt mind trying to push up my oc but how safe is the modding? did u stress test it under those speeds?

You will have to bump you fan speed up > 50% if you push the clocks. Also, VMods are never really completely "safe"

keninishna · 07-08-08, 10:40 AM

Quote:

Originally Posted by reznik

KENINISHNA

.

hats off to you mate thats awsome...hmm i wouldnt mind trying to push up my oc but how safe is the modding? did u stress test it under those speeds?

I only tested it for a few hours last night no real stress testing other than a couple vantage runs. the voltmod seems safe enough I hear though that the voltage regulators on the card can get hot and shut it down and putting some heatsinks on them helps. Temps on the core aren't bad though around 60c load with fan at 52%.

Quote:

Originally Posted by Super Nade

It may turn on and run, but I would not feel comfortable to suggest it for X-Fire. I'd recommend a minimum 600W unit (a good one at that). Post a thread in the power supply forum and we can take it from there.

ken, is it a pencil mod or a hard mod? How are you reading VCore? Does any software read it accurately?

You will have to bump you fan speed up > 50% if you push the clocks. Also, VMods are never really completely "safe"

Its a hard mod I just soldered 3 10 ohm resistors together. I don't know how to read vcore at the moment which is really dangerous but temps are ok so im not worried right now but as soon as I figure it out I'll tell you the actual voltage.
As for pencil mod the 4870 requires only about 20-30 ohms which is waay too low to pencil I feel much safer with just 2-3 resistors soldered onto the board. I guess its safe someone at XS allready killed a card but the guy used a 50k variable resistor and turned it all the way down to like 10 ohms which is just baad. As long as your soldering skills aren't terrible its not a hard mod to do.

keninishna · 07-09-08, 01:39 PM

I lowered the ohms to 20 and I was able to raise the clock an additional 10 mhz to 870 however I'm still not able to get an accurate voltage reading but heat is still pretty good. I'm thinking the 30 gauge kynar wire I used for the mod might be too small. I also played crysis on v high with x4 aa last night for about an hour and half with no problems some minor memory artifacts I might pencil mod my memory to make it more stable. The drivers though keep bugging out at first crysis would play for about 2 seconds then the drivers would crash so I upgraded to the 8.7 beta drivers and that worked until I rebooted now they crash crysis

3dmark 06 when I upgraded the drivers got me around 11,000 points so I rebooted and now the drivers crash and I can't complete the bench but for some reason vantage runs fine at any given time. I'll try driver cleaner and reinstall the hotfix drivers later today to see if that fixes it other than that this card is sick I couldent play crysis at those settings with a gx2.

mgoode · 07-09-08, 03:34 PM

I got a second card from a canadian site for 245.00 shipped

1 Visontek 4870and 1 Saphire 4870 in crossfire, both cards at 790/1100 stock volt and stock cooling.

reznik · 07-09-08, 05:34 PM

u didnt, man thats cyco hmm 2 4870's i wanna buy a second one to now

HousERaT · 07-09-08, 10:10 PM

4850s have been received. Testing now. ;-)

Fan at 50% is quiet.

nockawa · 07-10-08, 02:08 AM

Quote:

Originally Posted by Super Nade

It may turn on and run, but I would not feel comfortable to suggest it for X-Fire. I'd recommend a minimum 600W unit (a good one at that). Post a thread in the power supply forum and we can take it from there.

Well, after some research it ends out that my rig would pump something like 19.5A on the V12_1 line of the power supply, which is more than the 17A mentionned by the manufacturer. The 500W should be enough though...

I think I will pull back and keep only one card, this is the safest way, and it's enough to run any kind of games...

vixro · 07-10-08, 04:53 AM

This is slightly off topic, but still a little on topic.

http://www.ocforums.com/showthread.php?t=568842

I laughed so hard at the first line. I wonder if he realizes the GX2 is outperforming the GTX 280 in like, everything. xD

Aren't you all GLAD YOU BOUGHT 4850/4870's now?!

HousERaT · 07-10-08, 10:58 PM

Just getting started.

reznik · 07-11-08, 12:24 PM

ahahha 30k + that is sum mad skillz rite there, what about higher rez?..makes me wanna buy a water cooling kit and clock my quad to 4gig cee what scores i can muster up

good job!

SuperDave1685 · 07-11-08, 04:12 PM

Damn Houserat..... Nice clocks on that Duallie...

and 30K to boot!! Good job!

Parad0x420 · 07-11-08, 04:22 PM

hope you both noticed he's showing that score from 3D Mark 05.. but thats still a damn high score anyways, nice work HR

HousERaT · 07-11-08, 04:26 PM

Quote:

Originally Posted by Parad0x420

hope you both noticed he's showing that score from 3D Mark 05.. but thats still a damn high score anyways, nice work HR

Nobody is gonna hit 30K in 06 using these cards without LN2 on everything including the power supply, monitor, keyboard and mouse.

El<(')>Maxi · 07-11-08, 04:45 PM

Quote:

Originally Posted by keninishna

I'm thinking the 30 gauge kynar wire I used for the mod might be too small.

The wire size doesn't matter on a FB mod such as this, there's no real current flowing thru it

Quote:

Originally Posted by mgoode

I got a second card from a canadian site for 245.00 shipped

Nice!

Quote:

Originally Posted by HousERaT

Nobody is gonna hit 30K in 06 using these cards without LN2 on everything including the power supply, monitor, keyboard and mouse.

What are you waiting for?

reznik · 07-11-08, 05:52 PM

AHAHAHH 3d mark 05 got me there howbout 06 and vantage?

HousERaT · 07-11-08, 08:26 PM

Just changed cooling on my hot card to a Duorb and -10°C. Was idling at 42°C and now at 32°C.

MIAHALLEN · 07-12-08, 07:44 AM

Quote:

Originally Posted by HousERaT

The wall of fame staff are pic mongers.

Good start though.

@Supertrucker: what brand card are you using?

Having some trouble with 3DMark03 ATM...but will get a better pic up soon.

07-08-08, 12:24 AM	#61
keninishna Member Join Date: Sep 2006	I did the vmod and I should have 1.36v under load I don't know how people are measuring the voltage but it seems to be working and temps seem to be ok no artifacts but if I go over 860 I get them. I'll probably go up to 1.41 volts tomarrow and see if I can hit 900+ on core. I modded the bios of the card but only to regulate the fan and Im using amdgpu tool to set the clocks.
	QUOTE Thanks

07-08-08, 04:18 AM	#62
nockawa Registered Join Date: Jun 2008	Is a 500W Alim enough for two 4850 ? Hello guys, I already have one 4850, and I'd like to get another one in crossfire, but I'm wondering if my PSU will be able to handle everything inside my rig. The PSU I have is a Antec's EarthWatts 500W. You can see in my signature the rig description (mainly Q6600 G0 and 4 HDDs)... Thanks for the advices!
	QUOTE Thanks

07-09-08, 01:39 PM	#66
keninishna Member Join Date: Sep 2006	I lowered the ohms to 20 and I was able to raise the clock an additional 10 mhz to 870 however I'm still not able to get an accurate voltage reading but heat is still pretty good. I'm thinking the 30 gauge kynar wire I used for the mod might be too small. I also played crysis on v high with x4 aa last night for about an hour and half with no problems some minor memory artifacts I might pencil mod my memory to make it more stable. The drivers though keep bugging out at first crysis would play for about 2 seconds then the drivers would crash so I upgraded to the 8.7 beta drivers and that worked until I rebooted now they crash crysis 3dmark 06 when I upgraded the drivers got me around 11,000 points so I rebooted and now the drivers crash and I can't complete the bench but for some reason vantage runs fine at any given time. I'll try driver cleaner and reinstall the hotfix drivers later today to see if that fixes it other than that this card is sick I couldent play crysis at those settings with a gx2. Last edited by keninishna; 07-09-08 at 01:56 PM.
	QUOTE Thanks

07-09-08, 03:34 PM	#67
mgoode Member Join Date: Jan 2005 Location: The MotherShip	I got a second card from a canadian site for 245.00 shipped 1 Visontek 4870and 1 Saphire 4870 in crossfire, both cards at 790/1100 stock volt and stock cooling. Attached Images __________________ Benching: 980X "Behold, I am Funkadelic. I am not of your world. But fear me not, I will do you no harm. Loan me your funky mind and I shall play with it. For nothing is good unless you play with it. And all that is good, is nasty!" ("What Is Soul," Funkadelic, 1969) Click me - Join the Benching team today!
	QUOTE Thanks

07-09-08, 05:34 PM	#68
reznik Member Join Date: Jun 2008 Location: Somewhere in the UK	u didnt, man thats cyco hmm 2 4870's i wanna buy a second one to now
	QUOTE Thanks

The HD 4870/50 Thread

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07-09-08, 10:10 PM	Thread Starter #69
HousERaT Senior Air Extraordinaire Join Date: Apr 2004 Location: Imladris	4850s have been received. Testing now. ;-) Fan at 50% is quiet. __________________ CM-690 \| Maximus Formula \| Ballistix D9GMH 2GB - 4-4-4-10 - 2.2v (active cooled) \| E6850 @4GHz (L719B) 602 Bios 500x8 - 1.475v \| Ultra 120 Extreme \| 2x HD3870 840/1300 \| Lite-On 52327s CDRW \| WD 74GB - Raptor HDD \| Corsair 620HX PSU \| Windows XP Pro sp2 \| Support the OC Benchmarking Team The HD 4870/50 Thread The HD 3870/50 Thread The X1900XT/XTX Thread X800GTO² Thread Heatware Make friends with your "FAST" - 90K 01SE - 77K 03 - 29K 05 - 19K 06 - 274K AM3 - single card all air baby!
	QUOTE Thanks

07-10-08, 04:53 AM	#71
vixro Member Join Date: Mar 2004 Location: Denver	This is slightly off topic, but still a little on topic. http://www.ocforums.com/showthread.php?t=568842 I laughed so hard at the first line. I wonder if he realizes the GX2 is outperforming the GTX 280 in like, everything. xD Aren't you all GLAD YOU BOUGHT 4850/4870's now?! __________________ Intel i7-2600K @ 45x100 (4.5ghz) 1.36v G.Skill Ripjaw Z 4x4GB 2134mhz @ DDR3-1068 9-11-10-27-2T - 1.65v ASRock Z68 Extreme4 1.70 Gigabyte GTX 680 2GB @ 1250mhz / 7030mhz Auzen X-Fi Prelude 7.1 on Cardas recabled HD580 Little Dot MKIII Headphone Amplifier (Cardas mini-RCA IC) Silverstone DA750 750w PSU heatware
	QUOTE Thanks

07-10-08, 10:58 PM	Thread Starter #72
HousERaT Senior Air Extraordinaire Join Date: Apr 2004 Location: Imladris	Just getting started. Attached Images __________________ CM-690 \| Maximus Formula \| Ballistix D9GMH 2GB - 4-4-4-10 - 2.2v (active cooled) \| E6850 @4GHz (L719B) 602 Bios 500x8 - 1.475v \| Ultra 120 Extreme \| 2x HD3870 840/1300 \| Lite-On 52327s CDRW \| WD 74GB - Raptor HDD \| Corsair 620HX PSU \| Windows XP Pro sp2 \| Support the OC Benchmarking Team The HD 4870/50 Thread The HD 3870/50 Thread The X1900XT/XTX Thread X800GTO² Thread Heatware Make friends with your "FAST" - 90K 01SE - 77K 03 - 29K 05 - 19K 06 - 274K AM3 - single card all air baby!
	QUOTE Thanks

07-11-08, 12:24 PM	#73
reznik Member Join Date: Jun 2008 Location: Somewhere in the UK	ahahha 30k + that is sum mad skillz rite there, what about higher rez?..makes me wanna buy a water cooling kit and clock my quad to 4gig cee what scores i can muster up good job!
	QUOTE Thanks

07-11-08, 04:12 PM	#74
SuperDave1685 Member Join Date: Jul 2002 Location: USMC.. OoRah!!	Damn Houserat..... Nice clocks on that Duallie... and 30K to boot!! Good job! __________________ ლ(ಠ益ಠლ) *Main Rig-i7 920 D0 @ 4.2Ghz (1.17v), ASUS Rampage II Extreme, 12 GB Patriot DDR3 1600, ATI HD5970 @ 775/1100, SB X-Fi Xtreme Gamer, OCZ Revo X2 Drive SSD, 500GB, 1TB SATA, PCP&C Silencer 750W , D5 pump, Thermochill PA 120.3 w/ 3 Yate Loon Mediums, Swiftech Apogee XT*, Lian-Li PC-G75, ASUS VW226H 25.5", Logitech Z-5300e THX 5.1 Speakers My Massive PC Cleaning Thread! Heatware \| If the Army and the Navy Ever look on Heaven's scenes, They will find the streets are guarded By United States Marines. OoRah!
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07-11-08, 04:22 PM	#75
Parad0x420 Member Join Date: Jun 2007 Location: Dark Side of the Moon	hope you both noticed he's showing that score from 3D Mark 05.. but thats still a damn high score anyways, nice work HR __________________ Phenom II X6 1075T Thuban @ 4125 15 x 275 1.439v LLC enabled TRUE Black Rev. C - Shin-Etsu X23-7783D - CM R4 Reds push/pull ASUS Crosshair IV Formula AM3 890FX NB@2750Mhz HT@2200Mhz G.Skill Flare 4GB DDR3 @ 1833Mhz 7-8-7-24-1T 1.65v ASUS 7970 3GB @ 1000/1200 OCZ Vertex 4 256GB SATAIII - Win 7 Ultimate x64 2x WD 640GB Caviar Blue / 2x WD 750GB Caviar Black PCP&C 750W Silencer Black Samsung Syncmaster 2493HM 24" @ 1920x1200 Corsair Obsidian 700D Dêck Legend Toxic 3DMark06 - 23491 - Vantage - P18580 - Vantage X8757
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07-11-08, 05:52 PM	#78
reznik Member Join Date: Jun 2008 Location: Somewhere in the UK	AHAHAHH 3d mark 05 got me there howbout 06 and vantage?
	QUOTE Thanks

07-11-08, 08:26 PM	Thread Starter #79
HousERaT Senior Air Extraordinaire Join Date: Apr 2004 Location: Imladris	Just changed cooling on my hot card to a Duorb and -10°C. Was idling at 42°C and now at 32°C. __________________ CM-690 \| Maximus Formula \| Ballistix D9GMH 2GB - 4-4-4-10 - 2.2v (active cooled) \| E6850 @4GHz (L719B) 602 Bios 500x8 - 1.475v \| Ultra 120 Extreme \| 2x HD3870 840/1300 \| Lite-On 52327s CDRW \| WD 74GB - Raptor HDD \| Corsair 620HX PSU \| Windows XP Pro sp2 \| Support the OC Benchmarking Team The HD 4870/50 Thread The HD 3870/50 Thread The X1900XT/XTX Thread X800GTO² Thread Heatware Make friends with your "FAST" - 90K 01SE - 77K 03 - 29K 05 - 19K 06 - 274K AM3 - single card all air baby!
	QUOTE Thanks

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