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Does Vista (32bit) or HP have a built in cap to prevent overclocking?

post #1 of 7
Thread Starter 
I downloaded and installed the following software:
GPU-z
EVGA Precision

I have an HP Pavilion Slimline with Vista 32-bit OS.
The stock graphics card was replaced with nVidia GeForce 8400gs.

Base readings from the card:
Core clock: 520
Shader: 1240 (or something near that)
Memory: 400

I bumped it up a bit:
Core: 560
Shader: (some linked value)
Memory: 420

(Then I did a Windows performance score test just for the hell of it.
my Gaming Graphics went from 3.7 to 3.8)

Here's where my question starts:
Opened GPU-z to monitor the various settings. It reads:
Core: 560 Shader: (linked # that I can't remember) Mem: 420
default: 520 default: 1240 default: 400

Then I go to the sensor page and its reporting that the card is only functioning at 520 Mhz.
So I open Counter-Strike: Source and play a few rounds. My FPS is slightly higher... from 45 - 50; now at 60 - 70.

I go back and bump up the clock to 600. No more gain in FPS.

Go back to GPUz and it reports that its still running at 520. So I check the tab that says "Show Maximum" and its still 520. No matter what I do, it maintains that the card's maximum clock speed is capped at 520.

So, is this a problem with the sensors? Perhaps they aren't reading the card right.
Or, does HP or Vista have some sort of protection to cap the GPU settings?

I saw a bit of a gain, so something is working, but I would like to know if I could be reaping more gains.

[edit] Just for the sake of it, I bumped my core clock setting up to 700 and did a Windows Experience Score check. It just stayed at 3.8. So maxed out the core clock value, ca. 940 and did another windows experience score check. Still 3.8. Why did I gain one point for a 40 Mhz change and no gain for the 420 Mhz change?
Edited by Jazzaphone420 - 5/21/11 at 5:41am
post #2 of 7
Is the 8400gs even supported in Precision?

OEMs can't block gpu overclocking, they can only fail to provide overclocking options in the bios for cpu/ram/nb type overclocks. However once in windows there is nothing an OEM could do to prevent gpu overclocking.
    
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post #3 of 7
8400gs; not worth the trouble.

Does Vista (32bit) or HP have a built in bios lock to prevent gpu overclocking?: No
Does Vista (32bit) or HP have a built in bios lock to prevent cpu/mem overclocking?: Yes
Edited by Rowey - 5/21/11 at 5:51am
post #4 of 7
Thread Starter 
Ok, thanks. While the 8400gs may not be worth the trouble, it was given to me by a friend and better than stock.

But if there is no cap to the GPU and Precision is obviously compatible with the 8400gs, then that still leaves the most important aspect unaswered:

Why does GPUz say that the maximum clock speed reached is 520, when I have it set to clock at 600?
post #5 of 7
Quote:
Originally Posted by Jazzaphone420 View Post

Why does GPUz say that the maximum clock speed reached is 520, when I have it set to clock at 600?
There is no point to overclocking an 8400GS, u probably got .1 frame from that 520-600 overclock. Totally pointless basically.

u need a card with at least a 128 bit bus to see any real gains from overclocking, the 8400gs is 64 bit.
Um Stock....
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Um Stock....
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post #6 of 7
Quote:
Originally Posted by Jazzaphone420 View Post
Ok, thanks. While the 8400gs may not be worth the trouble, it was given to me by a friend and better than stock.

But if there is no cap to the GPU and Precision is obviously compatible with the 8400gs, then that still leaves the most important aspect unaswered:

Why does GPUz say that the maximum clock speed reached is 520, when I have it set to clock at 600?
You're assuming Precision is compatible simply because it read your clocks and when you moved the bar and hit apply it stayed there.

Check the Precision "support" list, I don't think you'll find your card on there. You might want to use the search feature for information on how to set up Riva Tuner, or search for how to overclock your card. Chances are Precision doesn't support your card at all.
    
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post #7 of 7
Shader straps! http://www.overclock.net/nvidia/4976...er-straps.html

Well, I think this is what your problem is. Though, going from 520 to 600 should have done SOMETHING.
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It plays TF2
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OCZ Vector 128GB Seagate 2TB  Seagate 500GB 7200.12 Some LG that works properly 
CoolingOSMonitorKeyboard
Corsair H105 Windows 8 Pro 64bit Samsung B2330h MS Digital Media Keyboard 
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