hd4890 changing speed randomly

[waynee]

another thing i find strage with this set up which ive never seen before is on the bootup black and white screen hat tells you mobo cpu ram and such under the cpu is had in brackets soemthing like (cpuid40750000003 patch) those are made up numbers by the way

[waynee]

yes im using same one but the psu in my old pc is 500w and cheap name which has ran it for 2years so why would it be that

[Dark Mantis]

Well the PSUs degrade with time so if you have been using it for two years old it is probably only actually outputting less than 440W now.

[waynee]

the one i use with new system is brand new im not using the old one in it http://www.ebuyer.com/product/204355?utm_source=google&utm_medium=products

[absic]

On an average system we feel that a single Radeon 4890 series requires you to have a 550 Watt power supply unit at minimum if you use it in a high-end system, and I feel that's a little on the safe side. Also recommended is a total of 32 AMPs on the +12 volt rails for stable power distribution (in a single card configuration).

Check all of this review with regard to power requirements for a 4890 GPU: http://www.guru3d.com/article/radeon-hd-4890-review-test/5

As DM stated, overtime the actual power from a PSU will deteriorate and this could be the cause of your problems.

[Dark Mantis]

the one i use with new system is brand new im not using the old one in it http://www.ebuyer.com/product/204355?utm_source=google&utm_medium=products

Even if you are using this one it is still outputting only 18amps on each of the two 12V rails.

[waynee]

people always say its the psu though but i have a feeling its no the psu i just wanna make sure before i have to spend antoher £60. do you know what that cpuid3489465653patchid means on the post screen?

[bytheway_r]

Well, I'll say that it's NOT very likely that the PSU is the problem. If it's a brand new one it should be enough to run this card. Unless you have some VERY power hungry setup it'll probably use only 250-350W when stressed. I'm not saying it's a good idea to run this GPU off a 500W PSU but it'll do for a year or 2 if there's no other option. 18amps per rail is a minimum for this card but should work.

My vote goes to damaged / buggy drivers. It'd be best to check the card with another PC or on a clean system.

[absic]

One of the reasons that so many people blame the PSU is because this is often the main cause of problems. People spend a fortune on other hardware but baulk at buying a good quality PSU and think anything will do.

The CPUID and PATCH ID that you see at POST is normal and it is telling you about your CPU.

[waynee]

card works fine on old system its in there now playing games no problem. with cheap 500w psu. i was googling for similar problem yesterday and someone said something like hard drive borowing memoy or soemthing what is causing but i couldnt understand what he was saying, soemthing about he changed in bios

[waynee]

would this do the job? http://www.eclipsecomputers.com/product.aspx?code=PSC-550GX by the way i noticed on that new psu ive got the pice and mobo or cpu forgot which is shard on first rail and other connectors on other rail hich i put the 4pin to 6pin on

[bytheway_r]

Then this is software related. What bios version do you have? If it's not the newest ( non-beta ) then update it via Q-Flash. Maybe it'll solve this.

If that won't help then I'm afraid your best bet would be a format and fresh install of the OS. If that won't fix it then it's either motherboard's bios or something hardware not working right in your new PC.

[waynee]

i installed f13 bios with @bios

[Dark Mantis]

Don't use @BIOS! It's far more dangerous and more likely to fail than QFlash which is part of the BIOS.

[bytheway_r]

Exactly, I'd reinstall that bios if I were you. Maybe it'll help.