<?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="../4_X02.xsl"?><ownershipDocument>    <schemaVersion>X0303</schemaVersion>    <documentType>4</documentType>    <periodOfReport>2009-08-28</periodOfReport>    <notSubjectToSection16>0</notSubjectToSection16>    <issuer>        <issuerCik>0001045810</issuerCik>        <issuerName>NVIDIA CORP</issuerName>        <issuerTradingSymbol>NVDA</issuerTradingSymbol>    </issuer>    <reportingOwner>        <reportingOwnerId>            <rptOwnerCik>0001197652</rptOwnerCik>            <rptOwnerName>SEAWELL A BROOKE</rptOwnerName>        </reportingOwnerId>        <reportingOwnerAddress>            <rptOwnerStreet1>C/O NVIDIA CORPORATION</rptOwnerStreet1>            <rptOwnerStreet2>2701 SAN TOMAS EXPRESSWAY</rptOwnerStreet2>            <rptOwnerCity>SANTA CLARA</rptOwnerCity>            <rptOwnerState>CA</rptOwnerState>            <rptOwnerZipCode>95050</rptOwnerZipCode>            <rptOwnerStateDescription></rptOwnerStateDescription>        </reportingOwnerAddress>        <reportingOwnerRelationship>            <isDirector>1</isDirector>            <isOfficer>0</isOfficer>            <isTenPercentOwner>0</isTenPercentOwner>            <isOther>0</isOther>        </reportingOwnerRelationship>    </reportingOwner>    <nonDerivativeTable>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock</value>            </securityTitle>            <transactionDate>                <value>2009-08-28</value>            </transactionDate>            <deemedExecutionDate></deemedExecutionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>S</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionTimeliness>                <value></value>            </transactionTimeliness>            <transactionAmounts>                <transactionShares>                    <value>45000</value>                </transactionShares>                <transactionPricePerShare>                    <value>14.67</value>                    <footnoteId id="F1"/>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>90000</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>I</value>                </directOrIndirectOwnership>                <natureOfOwnership>                    <value>By Trust</value>                    <footnoteId id="F2"/>                </natureOfOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeHolding>            <securityTitle>                <value>Common Stock</value>            </securityTitle>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>75000</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>I</value>                </directOrIndirectOwnership>                <natureOfOwnership>                    <value>By Trust</value>                    <footnoteId id="F3"/>                </natureOfOwnership>            </ownershipNature>        </nonDerivativeHolding>    </nonDerivativeTable>    <footnotes>        <footnote id="F1">Represents weighted average sales price.  The shares were sold at prices ranging from $14.65 to $14.68.  The Reporting Person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.</footnote>        <footnote id="F2">By A. Brooke Seawell TTEE, Rosemary Warner Seawell TTEE, Rosemary &amp; A. Brooke Seawell Revocable Trust U/A Dtd 1/20/2009.</footnote>        <footnote id="F3">By The Seawell Revocable Trust, of which Mr. Seawell is the trustee.</footnote>    </footnotes>    <remarks></remarks>    <ownerSignature>        <signatureName>John T. McKenna, Attorney-in-Fact for A. Brooke Seawell</signatureName>        <signatureDate>2009-08-31</signatureDate>    </ownerSignature></ownershipDocument>
