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Sapphire HD6450 GDDR3 512MB Voltmods

post #1 of 10
Thread Starter 
Sapphire HD6450 GDDR3 512MB - non reference design


power supply

GPU und video memory are using a single phase pwm design at a time.

p1030872bo7o.jpg
# Spule = choke
# Eingangskondensator = input cap
# Ausgangskondensator = output cap




vGPU modification

IC: FP6329
FB: Pin 6 | Ground: Pin 3
default resistance: 1842
recommended variable resistor: 50k | new resistance <= 1777

pencil mod is possible alternatively

p10308762tsp.jpg




vMEM modification

IC: FP6329
FB: Pin 6 | Ground: Pin 3
default resistance: 1057
recommended variable resistor: 50k | new resistance <= 1035

pencil mod is possible alternatively

p1030874ptii.jpg




voltage reading points

single output caps of GPU and VRAM switching regulators can be used as voltage reading points.

default voltages
GPU(Idle): 913mV
GPU(Last): 1002mV
VRAM(Idle): 1608mV
VRAM(Last): 1615mV

p1030871upl1.jpg




overclocking

The Sapphire card comes with default clocks of 625MHz(GPU)/667MHz(VRAM) and can be overclocked stable to 775MHz/1000MHz at stock voltages. Most benchmarks will still run at 800MHz/1050MHz.

GDDR3 ICs has been relabeled by AMD but regarding the overclocking capability and shape it might be some 1.1ns VRAMs in 96 FBGA package.

gpuz_1vqp4.png



more to follow ...
Edited by mAlkAv!An - 5/31/11 at 3:54am
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post #2 of 10
you doing/done this or just the info? smile.gif
was looking at getting something cheap like this thats low powered lol
    
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post #3 of 10
Can't see the pictures. Maybe host them on some other place?
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post #4 of 10
Thread Starter 
Quote:
Originally Posted by Liighthead;13696508 
you doing/done this or just the info? smile.gif
was looking at getting something cheap like this thats low powered lol

Both, you can't post a mod guide unless you have tested its functionality by yourself.
But since this is the gfx card of my office/working rig I won't do heavy overvoltage until i have a replacement smile.gif
I've just added a overclocking section to the OP.
Quote:
Originally Posted by Andr3az;13696541 
Can't see the pictures. Maybe host them on some other place?

thanks for the hint, rehost done.
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post #5 of 10
ahk sweet tongue.gif pics weren't showing was unsure smile.gif

tobad cant get some high volts through it yet.. smile.gif be watching to see how far it goes..
btw what temps is this card running at? stock and oced

any idear as to how far your gonna push this card? or
    
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post #6 of 10
Thread Starter 
card has got a small passive cooling block but I added a 70mm fan @ 7V because there is only little airflow in the low profile case. I also replaced the thermal paste.
GPU is at ~45°C in idle and below 60°C under load now with 775/1000MHz.

I might check what voltage it needs for 1000MHz GPU clock but I'm sure this card can handle 1200MHz+ with good air cooling.
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post #7 of 10
ahk nice smile.gif
    
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post #8 of 10
Hi I'm new here. I know this post is old but I'm reposting because it's the best reference I've seen to my card thus far (not because I'm new here). I currently have HD 6450 1gb engineering sample (Caicos) and can only get 815/900 out of it with CCC/AB combo. I looked into BIOS modding but I heard this is a difficult route for this card, not to mention my old gateway motherboard, so I'm looking into taking the next step and voltmodding it

Of course you can probably guess the question I have coming up already: is my card's configuration the same as far as the power control goes or is it different from the 512Mb? I am not too worried about overheating, I ghetto-rigged this wicked cooling setup for it, and now I want to get the most out of it. Thoughts for the necroposter?
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post #9 of 10
Here is me again. I guess I forgot to mention after being up all night that I haven't tried any of this yet, other than seeing how far I can get the sliders to go and stay there, took me about 4 different versions of each program and 20-30 reboots to get them to work together. Anyway, I have been doing lots of research and I am now making a semi-educated guess that I can only get a significant performance boost out of my card if I increase the voltage (1v max stock). Long story short, I don't have a magnifying glass, but after looking at my card the layout is significantly different than this one. Noobie question, where do I go to learn how to learn about where all the pins and resistors and other goodies are, and how to use them?
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The Mad Cow
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post #10 of 10
Ok super NOOB here (probably still suffering from lack of sleep too). Let me see if I can get some pictures of it up here. Gotta borrow me a digicam.
The Mad Cow
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The Mad Cow
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Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz Gigabyte H61M-S2H HIS Radeon HD 6670 Kingston 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 ... 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Blue Samsung/Hitachi something or other assortment of leftovers from old systems hot-gl... Xubuntu 15.04 
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Sony whatevs Logitech K400 Thermaltake Smart650 Hand-me-down Gateway case 
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Can you believe I got it at a gas station? worth more than the software it came with. Sup... JVC XX in-ears Logitech f310 
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