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Volt modding Sapphire 4850 non reference card?

post #1 of 6
Thread Starter 
I've been trying to find I guide to do that on this card,but apparently there is none yet,the card components are located in a really different manner,I've tried to locate where to measure the voltages and couldn't find anything similar at the position the guides for the reference cards says to use.Has anybody made some advance on that for the non reference card?

For those how don't know this card,it's this one
http://www.overclockersclub.com/revi...e_hd4850_dual/
It has a considerably better cooling,so it's probably more suitable to do overvoltage and overclocking without the need to change the original cooler.
post #2 of 6
Thread Starter 
Searching the board more carefully I found most of the points,most are totally differente from the reference card(I was able to found it seeing the components nearby them on the reference card pics),can anyone with a reference card take some good hi-defs photos of all the points(including the ones used to measure the voltage),including the nearby area?
post #3 of 6
I have two of the same cards you have.

It's the Sapphire 100245L - 4850. Has a special biggin' fan, which I replaced on both with a MCW60-R.

JUST A NOTE: Those with this card & the MCW60-R, you need to sand the stock holder down about a washers worth. Its too tall and will NOT make contact with the GPU. (I get 33C idle, 36-37C load on both cards now)

The basic areas for GPU & GDDR volt mods are the same, they're just in a different areas. I'm still searching around for the contacts to test the voltage with a DMM. So as of yet I haven't voltmodded it. I might just put the volts up in the BIOS.
Loki
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Loki
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Q6600 G0 @ 3.690Ghz | 1.5vcore Asus Rampage Formula X48 2x Sapphire 4850 in CFX @ 700mhz 8GB GSKILL DDR2-800 @ 920 
Hard DriveOptical DriveOSMonitor
4x Raptor 300GB GLFS in Raid-0 LG BluRay/HDDVD Hybrid Vista 64-bit HP zr30w 30" 
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post #4 of 6
i to am looking for a volt mod for this card...?
any updates?
Bad ma'ama jamma
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Bad ma'ama jamma
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CPUMotherboardGraphicsRAM
2500k @ 4.5 MSI P67A-G45 Sapphire R290 tri-x 8GB ripjaws 
Hard DriveHard DriveCoolingCooling
2x samsung f3's in 0 OCZ Vertex 2  ek supreme hf (gold) EK Ultimate 360 XTX 
CoolingOSMonitorKeyboard
CPX Pro win 7 64 samsung s27a750 das model s pro 
PowerCaseMouseAudio
corsair tx750 haf 932 logitech g-9x asus xonar 
AudioAudioAudio
Onkyo TX-SR608 Energy mini V Formula F-12 
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post #5 of 6
Hey, reviving a ancient thread but i really need a volt mod or pencil mod for this card please. Going to be running under Dry Ice and cannot work with a max of 1.158v on the core.

Thanks
post #6 of 6
IC's are both on the back of the PCB.. vmem is located in the lower left corner of this pic... GPUv is on the right towards the VGA connections, in the middle of the PCB.

*its probably a up6201 for GPUv ... similar to a 3870. Most ref 4850's use the same IC/mod.

daily dosage
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daily dosage
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