New i5 3570k refuse to work with my asus 7850 graphics card

[andrewvoreakos]

Hello, Im having a big issue after yesterdays upgrade, I was running a Sandy Bridge Pentium g620 with Intel DH77EB M/B and Asus 7850 Graphics, Corsair Builder 430w v2. I decided to order a I5 3570k the other day and yesterday that i picked it up after installing the cpu the 7850 doesnt seem to be recognised at all in bios.

I tried flash every single of the 4 bios available from intel in the m/b, clear cmos, disabling i5's 4000 HD graphics with no result. Its like the card doesnt exist at all.

My First though was that there is something wrong with my card (card fan is working when booting). I replaced the cpu with my older one and card worked as intended.

Now my concern is that there is something wrong with the cpu. The cpu is working fine except from the issue with the card. Temperatures on idle are 40-45c. IntelBurnTest v2.54 runned with no error and temps topped 80-85c on full load.

I think there are 3 things that might be wrong,

1) 3570k have a bad pci-e 16x 3.0 bus. Dont know if its even possible but with g620 the graphics card is working in pci-e x16 2.0.
2) 7850 cant switch to pci-e 3.0. Doesnt seem possible too.
3) H77 chipset doesnt support pci-e 16x with k proccessors or m/b is failing.

or im missing something else?

Note that ofcourse there is no overclock in cpu or graphics card.

Any advise or idea is welcome.

 

[ShintaiDK]

Its not the mobo/chipset as far as I can tell. The chipset got nothing to do with the CPUs x16 lanes. Its roughly just traces on the mobo.

Best thing would be if you could get another GFX card to test with. If it works, its the 7850, if it dont, its the CPU.

Try reseating both GFX card and CPU as well.

 

[andrewvoreakos]

thnaks for the answer. the 7850 is working on the exact same pc with g620 instead of 3570k, thats confirms my initial concern that the cpu must be faulty or something, but can a cpu be faulty only in the pci lanes section? Im having a normal performance from the cpu and 4000 graphics.

 

[ShintaiDK]

thnaks for the answer. the 7850 is working on the exact same pc with g620 instead of 3570k, thats confirms my initial concern that the cpu must be faulty or something, but can a cpu be faulty only in the pci lanes section? Im having a normal performance from the cpu and 4000 graphics.

Or your 7850 fails in PCIe 3.0 mode.

You can also physically inspect the CPUs pads, see if any is broken.

Defective CPUs are pretty rare to say it mildly.

 

[andrewvoreakos]

is it possible 7850 to run in pci-e 2.0 with i5 3570k? even if it wasnt able to run in pci-e 3.0 wouldnt working in pci-e 2.0 with g620 make it run anyways (since pci-e 3.0 is compartible with 2.0)

 

[ShintaiDK]

is it possible 7850 to run in pci-e 2.0 with i5 3570k? even if it wasnt able to run in pci-e 3.0 wouldnt working in pci-e 2.0 with g620 make it run anyways (since pci-e 3.0 is compartible with 2.0)

No, there is no way for you to switch it.

Do you have any other type of PCIe cards? Then you can try plug one in the slot too.

 

[andrewvoreakos]

unfortunatly i dont have another graphics card available, also what i didnt mention is that the xonar dx in the pci-e 1.0 slot is working well with both cpus. dont know how this might be relevant however.

Also can i rule out a possible PSU problem since one cpu is 65w and the other 77w tdp?

 

[ShintaiDK]

unfortunatly i dont have another graphics card available, also what i didnt mention is that the xonar dx in the pci-e 1.0 slot is working well with both cpus. dont know how this might be relevant however.

Also can i rule out a possible PSU problem since one cpu is 65w and the other 77w tdp?

So the slot actually works with the soundcard? When you plug the soundcard in the x16 slot?

 

[andrewvoreakos]

im guessing there is no way i can check the pci-e status of the 7850 myself. my drivers or something then. most possible explanation for the issue is faulty 7850 as you say i guess. any way to notice any signes of faulty cpu? guess im stuck

 

[andrewvoreakos]

hmm havent thought plugging the sound card in 16x, soundcard works in the slot upper than the 16x. the 1x one.

But even then it wont reproduce the problem with pci-e 3.0.
Not sure myself but with pure logic wouldnt the chips on graphics card responsible for the pci-e 2.0 signal be the same as the pci-e 3.0 signal? the graphics card is working as a champ 2 months now.

 

[ShintaiDK]

Try plug the soundcard in the x16 slot. if it fails, its the CPU.

 

[andrewvoreakos]

anyway thanks for your help, will try a thing or two and see