Upgrading GPU from Gt430 to 7750

[akshayghai29785]

My Config is:

CPU-i5-760
MOBO:GA-H55M-D2H(PCIE 2.0)
PSU-Local Iball
RAM-Kingston High value 1333

Kindly suggest for GPU upgrade will 7750 or Gtx 650 run on its full potential on PcieX16. or should i go gor crossfire of 7750x4 7750X4??

 

[geekapproved]

Why wouldn't it run it's full potential?

7750 800mhz is a huge upgrade from a GT430. The 900mhz version is even faster.

 

[rdc85]

err please specify the PSU, Wattage / ampere rating..

what do u means by 7750x4? quad fire?

I don't think it good route to CFX 7750...

 

[Onus]

I see that your board has two PCIe slots, the second of which runs at x4. This will not be good for Crossfire; you'd want x8,x8 rather than x16,x4.
Fortunately, as geekapproved stated, the HD7750 is a big step up from the GT430.
I am not familiar with "Iball" PSUs, and to be safe would assume it is low-quality. Unless it has a PCIe power cable on it, do not get the 900MHz version of the HD7750, which needs that power cable (the 800MHz version does not). While it is possible to use an adapter, a PSU without that cable may not be able to provide sufficient power on +12V to run stably or safely.

 

[geekapproved]

I see that your board has two PCIe slots, the second of which runs at x4. This will not be good for Crossfire; you'd want x8,x8 rather than x16,x4.
Fortunately, as geekapproved stated, the HD7750 is a big step up from the GT430.
I am not familiar with "Iball" PSUs, and to be safe would assume it is low-quality. Unless it has a PCIe power cable on it, do not get the 900MHz version of the HD7750, which needs that power cable (the 800MHz version does not). While it is possible to use an adapter, a PSU without that cable may not be able to provide sufficient power on +12V to run stably or safely.

++++1

 

[pevkovic]

Just to pitch in here say that crossfire with low end video cards comes with more microstuttering. So u should consider that as well.

Correct me if i am wrong.

 

[geekapproved]

Yeah crossfiring low end cards doesn't make a lot of sense. It's kind of like having dual exhaust on your lawnmower.

 

[blazorthon]

Crossfire with the 77xx cards works much better than with most other lower end cards, but it's still no better than just getting a single 7850 or 7870 that roughly match 7750 CF and 7770 CF (kinda funny that the 7850 roughly matches 7750 CF and the 7870 roughly matches 7770 CF) in performance, but also have about the same price/performance and have double the VRAM capacity per GPU. 7750 CF also doesn't work well in an x4 PCIe slot. 7770 CF would work better with a CF bridge, but 7750 CF relies entirely on the PCIe lanes for CF talk between cards and PCIe 2.0 x4 might bottle-neck that severely. If you're considering 77xx CF, just get a 7850 or 7870 instead.

 

[stant1rm]

Crossfire with the 77xx cards works much better than with most other lower end cards, but it's still no better than just getting a single 7850 or 7870 that roughly match 7750 CF and 7770 CF (kinda funny that the 7850 roughly matches 7750 CF and the 7870 roughly matches 7770 CF) in performance, but also have about the same price/performance and have double the VRAM capacity per GPU. 7750 CF also doesn't work well in an x4 PCIe slot. 7770 CF would work better with a CF bridge, but 7750 CF relies entirely on the PCIe lanes for CF talk between cards and PCIe 2.0 x4 might bottle-neck that severely. If you're considering 77xx CF, just get the 7850 or 7870 instead.

+1

Also crossfiring 7750's on a suspect PSU might be too much for it.

 

[geekapproved]

2-7750's (800mhz model) uses 86w, the same as a single 7770. But yeah, he sais I-ball and doesn't even state a model.

 

[blazorthon]

2-7750's (800mhz model) uses 86w, the same as a single 7770. But yeah, he sais I-ball and doesn't even state a model.

Two 7750s (even the 800MHz model) use more power, not less power, than a single 7770, at least they do in every build that I've tested with these cards even when the rest of the builds' hardware and theirs PSUs were identical. Granted, that's only a few builds, but that shouldn't change the power consumption of the graphics cards.

 

[Onus]

Well, until the OP gives more information about his intended results, his PSU, and his budget, we're just nattering.

 

[stant1rm]

Well, until the OP gives more information about his intended results, his PSU, and his budget, we're just nattering.

I fully support the use of the word "nattering" in this context.

 

[geekapproved]

Two 7750s (even the 800MHz model) use more power, not less power, than a single 7770, at least they do in every build that I've tested with these cards even when the rest of the builds' hardware and theirs PSUs were identical. Granted, that's only a few builds, but that shouldn't change the power consumption of the graphics cards.

7750 (800mhz version) is rated at 43w. 7770 is rated at 86w.

http://www.guru3d.com/articles_pages/amd_radeon_hd_7750_and_7770_review,7.html

 

[blazorthon]

7750 (800mhz version) is rated at 43w. 7770 is rated at 86w.

http://www.guru3d.com/articles_pages/amd_radeon_hd_7750_and_7770_review,7.html

Right from your link:

Note: there has been a lot of discussion using FurMark as a stress test to measure power load. Furmark is so malicious on the GPU that it does not represent an objective power draw compared to really hefty gaming. If we take a very-harsh-on-the-GPU gaming title, then measure power consumption and then compare the very same with Furmark, the power consumption can be 50 to 100W higher on a high-end graphics card solely because of FurMark.

Those aren't very realistic power consumption numbers and not only that, but the measurements are hardly accurate for several other reasons that are also in that link.

 

[geekapproved]

So what do you suggest they test the power draw with?

 

[blazorthon]

So what do you suggest they test the power draw with?

Power draw of the graphics card is what is asked for, so that is what should be tested. This is usually not tested directly because it's more difficult, but it is the most accurate. It should be tested with a few games running instead of a stress test benchmark because you buy cards to game, not to stress test even if you do that occasionally. There's nothing wrong with providing stress test data, but it should not be replied on solely for realistic power draw tests.

 

[nforce4max]

Well going crossfire in its self is not a bad idea, it is when done upfront but later on having a second card at a much lower price is where it becomes a good value option. You can run the GT430 as a dedicated physx card in the bottom slot. As for 16x by 4x crossfire the performance won't match a 8x by 8x or 16x by 8x ect level crossfire but the loses from 8x to 4x turns out to be small so you can still get some decent gains. If 4x can handle much higher performing cards like a gtx480 then a simple 7770 is nothing to worry about.

http://www.hardocp.com/article/2010/08/25/gtx_480_sli_pcie_bandwidth_perf_x16x16_vs_x4x4/

 

[akshayghai29785]

Answering the questions

Iball local PSU is 400w local PSU no other details are mentioned on the PSU.

Been in india it was late night so late replies

Why i thought i would not run on its full potential was as the card is PCIe-3 whereas my board in is PCIe-2 x16

Upgrading the PSU & 7770 is costing around 15000 INR whereas 7750 is costing 7500 INR & 7850 is 21000 INR

I am tight on budget

 

[rdc85]

Pciex-3 full backwards compatible with Pciex-2,

don't worry about it the card will run fine

 

[akshayghai29785]

Oh that means on pcie-2 x16 all pcie-3 cards would run on their 100% potential

 

[rdc85]

Most of the time except maybe in 690 or 7990 u will lose 2-3 fps...

joking..

ehm Pci-ex3 card will run fine in pci-ex2 slot ....

(on notice: i'm don't know how HD8xxx or GTX7xx will perform)

 

[blazorthon]

Both AMD and Nvidia should make some big leaps in performance with the next generation. Nvidia is switching to the far superior Kepler FP64 micro-arch and AMD is making some very good improvements too.

Going from PCIe 3.0 x16 to PCIe 2.0 x16 is usually a performance drop of between 0% and 1%, so don't worry about it. Going from PCIe 3.0 x4 to PCIe 2.0 x4 is the main performance drop.

The only PCIe versions that are know to have trouble is PCIe 2.1 in a PCIe 1.x slot.

 

[stant1rm]

I think I saw a test that show the GTX 690 actually loses almost 5% of it's performance on PCI-E 2.x.

 

[blazorthon]

I think I saw a test that show the GTX 690 actually loses almost 5% of it's performance on PCI-E 2.x.

Well, yes, but that's a very high-end dual-GPU card. I suppose that I should have specified more, my bad.