How to overclock a 7850 past 1050MHz?

Defy Belief · 7 Apr 2012 at 20:57

morguk said:
OCUK deals with it

For the entire 2 years?

Nickjf20 · 7 Apr 2012 at 23:10

I'm even more on the fence now that I've seen these overclocking results and the offer of Dirt 3 !

I've currently got a VTX3D 5770 which is a noisy little thing that causes catalyst to crash with even the mildest overclock.

I'm just worried that the VTX3D 7850 isn't worth the £20 difference between it and the MSI, and I'd be better going with the better quality MSI or a Sapphire model.
Maybe VTX have upped their game, but judging from past experiences they cut too many corners.

On a sidenote, I've got a Lite-On 450W PSU with 18.5A on each of 2 rails with a combined max of 32A so I'm hoping this will be ok. I'm running an i7-920 at stock.

pieman109 · 7 Apr 2012 at 23:31

Just did a unigine run with the system in me sig and got:

FPS 38.8
score 977
min fps 25.5
max fps 80.7

Going by the scores attained by 555BUK and Hex, then providing you overclock, getting one of these to replace an unlocked 6950 is a no brainer really. Not only that but the Xfire possibilities are nice due to only one power socket used per card.

Ignorance · 7 Apr 2012 at 23:55

Noob question here, I've never overclocked before lol.

Does overclocking void your warranty.. because I was waiting for the 670 but I'm considering getting one of these and OC'ing it.

Warmagi · 8 Apr 2012 at 00:56

Thats a great topic as I bought a new DIY rig a week ago from OcUK and it was with this card Sapphire HD 7850 2048MB GDDR5. Would it overclock any better because of custom cooling? Although I dont know if its relevant cause I think my card just died without any overclocking and as I can see theyre out of stock so replacement wont be the same, right?

But apart from the fault a great card, I would say the best value to money atm.

welshdragon · 8 Apr 2012 at 07:22

pieman109 said:
Not only that but the Xfire possibilities are nice due to only one power socket used per card.

Exactly what I was thinking. Although less power and heat should make for a quieter system in my coolermaster silencio 550

psychodil · 8 Apr 2012 at 08:37

still no one has tried flashing with a 7870 bios? Might unlock some shaders

Locky · 8 Apr 2012 at 10:18

I have Asus GPU tool installed, I dont have a 7850 btw, I'm tweaking a 7970 - I don't get the option over voltage tweaking? looked everywhere, In MSI AB I get the opion etc, I'm using an unlocked bios btw.

HeX · 8 Apr 2012 at 10:24

You have to put ASUS Tweak into 'Advanced' mode to get the option to unlock.

ChrisD. · 8 Apr 2012 at 10:30

Why do I have a BIOS switch on my Sapphire 7950 OC 3GB?

Jerry64 · 8 Apr 2012 at 11:35

MilanoChris said:
Why do I have a BIOS switch on my Sapphire 7950 OC 3GB?

Both of the SAPPHIRE HD 7950 models have a dual BIOS, allowing for further experimentation by the enthusiast. On the OC edition, the second BIOS is pre-programmed to allow a higher maximum overclock and more aggressive fan profile.

Locky · 8 Apr 2012 at 11:36

HeX said:
You have to put ASUS Tweak into 'Advanced' mode to get the option to unlock.

Yes lol.

welshdragon · 8 Apr 2012 at 11:38

Nickjf20 said:
I'm even more on the fence now that I've seen these overclocking results and the offer of Dirt 3 !

I've currently got a VTX3D 5770 which is a noisy little thing that causes catalyst to crash with even the mildest overclock.

I'm just worried that the VTX3D 7850 isn't worth the £20 difference between it and the MSI, and I'd be better going with the better quality MSI or a Sapphire model.
Maybe VTX have upped their game, but judging from past experiences they cut too many corners.

On a sidenote, I've got a Lite-On 450W PSU with 18.5A on each of 2 rails with a combined max of 32A so I'm hoping this will be ok. I'm running an i7-920 at stock.

I was worried about VTX in this regard too. However, the model on offer is a reference one not a custom one. Did you get a 7850?

horrorwood · 8 Apr 2012 at 11:58

How would one of these compare to SLI GTX 460's?

ChrisD. · 8 Apr 2012 at 12:20

Jerry64 said:
Both of the SAPPHIRE HD 7950 models have a dual BIOS, allowing for further experimentation by the enthusiast. On the OC edition, the second BIOS is pre-programmed to allow a higher maximum overclock and more aggressive fan profile.

Thanks. Which switch position is which?

I have the card at 940/1290, any higher and the driver/game crashes.

I think I need to up the volts.

I would like to see 1000/1500, is it possible?

Jerry64 · 8 Apr 2012 at 12:37

MilanoChris said:
Thanks. Which switch position is which?

I have the card at 940/1290, any higher and the driver/game crashes.

I think I need to up the volts.

I would like to see 1000/1500, is it possible?

Sorry not sure which postion as don't own the card.

Info was found here. http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&lid=1&pid=1450&leg=0

555BUK · 8 Apr 2012 at 12:52

horrorwood said:
How would one of these compare to SLI GTX 460's?

GTX460 SLI will most likely be slightly faster, unless the 1GB VRAM becomes the limitation.

Nickjf20 · 8 Apr 2012 at 13:09

welshdragon said:
I was worried about VTX in this regard too. However, the model on offer is a reference one not a custom one. Did you get a 7850?

Nope, I've not got one yet, but probably will

I know it's a reference card, but surely the quality and therefore cost of the components used are up to VTX's discretion ?

If someone can confirm that the quality of the VTX reference card is comparable to any other brand, I'm sold.

welshdragon · 8 Apr 2012 at 13:59

Yes can anyone confirm this is just a vtx3d badged reference card?

welshdragon · 8 Apr 2012 at 14:47

Everything I can find suggests it is a reference card. Or at least teh one pictured is a reference card