The Radeon 7850 is an overclocking beast

[Dark Shroud]

Can anyone recommend a good site to buy those after market GPU coolers from?

 

[Arkadrel]

Can anyone recommend a good site to buy those after market GPU coolers from?

Maybe try one of these:

+

one of these:

Its about 43$ + 11$ = 54$ for this combo though.

If ordered from their site:
http://www.arctic.ac/en/p/cooling/vga/430/accelero-s1-plus.html?c=2182



other options:
Accelero Twin Turbo II ~65$

 

[w1nterchill]

I happen to stumble by this thread and it gave me inspiration to OC my sapphire 7850-OC.. With an asic quality of 86.2%, this results to a 250$ GPU reaching 7950/GTX 580 Territory

Core: 1,200Mhz
Mem: 6000Mhz
Voltage: 1.19v

 

[pantsaregood]

Is this card really doing this?

Visiontek Radeon HD 7850 (stock 860/1200) runs at 1050/1375 with a 10% voltage decrease. I believe it will run at 15% or 20% decrease, but I didn't attempt to try because I didn't have time to stability test it. OCCT wasn't picking up any errors - was it mistaken?

I didn't feel like flashing the BIOS to push it further, either.

 

[lakedude]

I demand to see page 41!

 

[Silverforce11]

Is this card really doing this?

Visiontek Radeon HD 7850 (stock 860/1200) runs at 1050/1375 with a 10% voltage decrease. I believe it will run at 15% or 20% decrease, but I didn't attempt to try because I didn't have time to stability test it. OCCT wasn't picking up any errors - was it mistaken?

I didn't feel like flashing the BIOS to push it further, either.

My 7950 runs 1.1ghz at well below stock so its possible. These cards are really poorly tuned by AMD, they a) give it too much volts for default clocks and b) put the clocks way too low

 

[country2]

Can anyone recommend a good site to buy those after market GPU coolers from?

I have a Diamond 7850 coming in this week that I got on ebay (150 shipped) and found a used (very good condition) Arctic Cooling Accelero Twin Turbo Pro Cooler - DCACO-V3400-BLA01 from Amazon Warehouse deals for 27.46 with free shipping figure it was worth the chance.

crap just noticed this is the old one rated at 120 watt cooling...time to cancel it!

 

[dmoney1980]

A friend of mine has the Sapphine 7950 OC edition, which software should I use to oc this card? AB? Trixx?

 

[thompo]

I bought myself a XFX DD (non-black editition) HD7850. Since GPU Tweak wouldn't let me change the voltage, I flashed it with the ASUS BIOS. Now, there is a voltage slider in GPU Tweak. The problem is this: no matter how I move the slider or set the voltage numerically i GPU Tweak, the voltage readings in GPU-Z do not change. Neither does my OC potential increase. Can anyone help me out here? Is my board simply restricted to stock voltage?
Cheers!

 

[Red Hawk]

Uh...probably. I don't know why you are expecting one board manufacturer's BIOS to work with a board from a different manufacturer.

 

[thompo]

Uh...probably. I don't know why you are expecting one board manufacturer's BIOS to work with a board from a different manufacturer.

I can't say I'm "expecting" it. Rather "hoping" for it. The reason is that alot of other people in this thread, using cards of different brands, flashed with the ASUS bios, and were all able to increase the voltage.

 

[3DVagabond]

It depends on the voltage control chip. Some aren't voltage adjustable. The one review I found of your card was a crap review that didn't show the components. They also didn't try overvolting the review sample. Without knowing the voltage control chip we can't tell you if it can have the voltage increased.

 

[thompo]

It depends on the voltage control chip. Some aren't voltage adjustable. The one review I found of your card was a crap review that didn't show the components. They also didn't try overvolting the review sample. Without knowing the voltage control chip we can't tell you if it can have the voltage increased.

Well, is there anyway I can find out which voltage control chip my card holds?

 

[3DVagabond]

You'd have to find a review that showed it in a hires pic.

This one doesn't offer voltage control

This one does.


To be honest, I'd be surprised if your card didn't use the "NCP5395T" in the first pic that doesn't offer voltage control. The CHiL chip is more costly and generally used in the more premium models and true reference designs.

 

[thompo]

You'd have to find a review that showed it in a hires pic.

To be honest, I'd be surprised if your card didn't use the "NCP5395T" in the first pic that doesn't offer voltage control. The CHiL chip is more costly and generally used in the more premium models and true reference designs.

OK, where on the card are these chips typically located? Are these chips the same as VRMs or MOSFETs?

 

[KingFatty]

Even if you have a chip that doesn't offer voltage control, you may still be able to use a pencil to draw on the circuit where the feedback resistor is, to manually increase voltage to your preference for getting a desired overclock.

 

[chimaxi83]

because you're buying epson cartridges from a retail store. Buy hte generics mail order and you save 90%

From what I've seen, typically on the right side of the board, below the PCI-e power connectors, to the right of the VRM's.

 

[thompo]

I bought myself a XFX DD (non-black editition) HD7850. Since GPU Tweak wouldn't let me change the voltage, I flashed it with the ASUS BIOS. Now, there is a voltage slider in GPU Tweak. The problem is this: no matter how I move the slider or set the voltage numerically i GPU Tweak, the voltage readings in GPU-Z do not change. Neither does my OC potential increase. Can anyone help me out here? Is my board simply restricted to stock voltage?
Cheers!

I might have set off a false alarm here :\ Sorry about that. As it turned out, GPU-Z is reporting the same voltage no matter the settings, but the GPU Tweak Monitor is infact reporting voltages according to my settings. Which one is more trustworthy?

 

[KingFatty]

I guess you could play with the voltage to see if the temperature changes. If no temperature change, then perhaps there is no voltage change despite what anything says.

 

[thompo]

I guess you could play with the voltage to see if the temperature changes. If no temperature change, then perhaps there is no voltage change despite what anything says.

Good idea! Thanks

 

[thompo]

I guess you could play with the voltage to see if the temperature changes. If no temperature change, then perhaps there is no voltage change despite what anything says.

The temperature stays at constant level, regardless the voltage being set to 1038 mV or 1300 mV. I therefore suppose that there is no real voltage control on this card However, running 1150 MHz on stock 1075 mV is pretty decent, so I'm not really that unhappy with my card anyway

 

[jacktesterson]

Just picked up a MSI Power Edition 7850.

Hope its as good as the Asus I had on launch!

 

[skipsneeky2]

My msi twin frozr 3 with a stock 1.21v voltage is running pretty swell out of box at 1150/1425,pumping it to 1200/1450 had my games locking up,and at 1175/1450,i was artifacting with lost of performance.

Love the card as the freaking thing runs very cool,even cooler then the more energy efficient xfx 6770 that got replaced,just trips me out.

 

[kalrith]

Just picked up a MSI Power Edition 7850.

Hope its as good as the Asus I had on launch!

I think you win the award for most new video card purchases this year!!! Please let us know how the overclocking goes.

 

[legcramp]

Have my Asus DCUII HD7850 for about a month now. 1180/1375 with 1.23 voltage fully stable. Runs everything I throw it at @ 1080p very nicely.